737 lines
29 KiB
Nix
737 lines
29 KiB
Nix
# The Nixpkgs CC is not directly usable, since it doesn't know where
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# the C library and standard header files are. Therefore the compiler
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# produced by that package cannot be installed directly in a user
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# environment and used from the command line. So we use a wrapper
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# script that sets up the right environment variables so that the
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# compiler and the linker just "work".
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{ name ? ""
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, lib
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, stdenvNoCC
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, cc ? null, libc ? null, bintools, coreutils ? null, shell ? stdenvNoCC.shell
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, zlib ? null
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, nativeTools, noLibc ? false, nativeLibc, nativePrefix ? ""
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, propagateDoc ? cc != null && cc ? man
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, extraTools ? [], extraPackages ? [], extraBuildCommands ? ""
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, nixSupport ? {}
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, isGNU ? false, isClang ? cc.isClang or false, isCcache ? cc.isCcache or false, gnugrep ? null
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, buildPackages ? {}
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, libcxx ? null
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# Whether or not to add `-B` and `-L` to `nix-support/cc-{c,ld}flags`
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, useCcForLibs ?
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# Always add these flags for Clang, because in order to compile (most
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# software) it needs libraries that are shipped and compiled with gcc.
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if isClang then true
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# Never add these flags for a build!=host cross-compiler or a host!=target
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# ("cross-built-native") compiler; currently nixpkgs has a special build
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# path for these (`crossStageStatic`). Hopefully at some point that build
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# path will be merged with this one and this conditional will be removed.
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else if (with stdenvNoCC; buildPlatform != hostPlatform || hostPlatform != targetPlatform) then false
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# Never add these flags when wrapping the bootstrapFiles' compiler; it has a
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# /usr/-like layout with everything smashed into a single outpath, so it has
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# no trouble finding its own libraries.
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else if (cc.passthru.isFromBootstrapFiles or false) then false
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# Add these flags when wrapping `xgcc` (the first compiler that nixpkgs builds)
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else if (cc.passthru.isXgcc or false) then true
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# Add these flags when wrapping `stdenv.cc`
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else if (cc.stdenv.cc.cc.passthru.isXgcc or false) then true
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# Do not add these flags in any other situation. This is `false` mainly to
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# prevent these flags from being added when wrapping *old* versions of gcc
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# (e.g. `gcc6Stdenv`), since they will cause the old gcc to get `-B` and
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# `-L` flags pointing at the new gcc's libstdc++ headers. Example failure:
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# https://hydra.nixos.org/build/213125495
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else false
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# the derivation at which the `-B` and `-L` flags added by `useCcForLibs` will point
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, gccForLibs ? if useCcForLibs then cc else null
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, fortify-headers ? null
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, includeFortifyHeaders ? null
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}:
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with lib;
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assert nativeTools -> !propagateDoc && nativePrefix != "";
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assert !nativeTools ->
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cc != null && coreutils != null && gnugrep != null;
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assert !(nativeLibc && noLibc);
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assert (noLibc || nativeLibc) == (libc == null);
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let
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stdenv = stdenvNoCC;
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inherit (stdenv) hostPlatform targetPlatform;
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includeFortifyHeaders' = if includeFortifyHeaders != null
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then includeFortifyHeaders
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else (targetPlatform.libc == "musl" && isGNU);
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# Prefix for binaries. Customarily ends with a dash separator.
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#
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# TODO(@Ericson2314) Make unconditional, or optional but always true by
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# default.
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targetPrefix = lib.optionalString (targetPlatform != hostPlatform)
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(targetPlatform.config + "-");
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ccVersion = lib.getVersion cc;
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ccName = lib.removePrefix targetPrefix (lib.getName cc);
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libc_bin = optionalString (libc != null) (getBin libc);
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libc_dev = optionalString (libc != null) (getDev libc);
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libc_lib = optionalString (libc != null) (getLib libc);
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cc_solib = getLib cc
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+ optionalString (targetPlatform != hostPlatform) "/${targetPlatform.config}";
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# The wrapper scripts use 'cat' and 'grep', so we may need coreutils.
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coreutils_bin = optionalString (!nativeTools) (getBin coreutils);
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# The "suffix salt" is a arbitrary string added in the end of env vars
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# defined by cc-wrapper's hooks so that multiple cc-wrappers can be used
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# without interfering. For the moment, it is defined as the target triple,
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# adjusted to be a valid bash identifier. This should be considered an
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# unstable implementation detail, however.
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suffixSalt = replaceStrings ["-" "."] ["_" "_"] targetPlatform.config;
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expand-response-params =
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lib.optionalString ((buildPackages.stdenv.hasCC or false) && buildPackages.stdenv.cc != "/dev/null") (import ../expand-response-params { inherit (buildPackages) stdenv; });
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useGccForLibs = useCcForLibs
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&& libcxx == null
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&& !stdenv.targetPlatform.isDarwin
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&& !(stdenv.targetPlatform.useLLVM or false)
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&& !(stdenv.targetPlatform.useAndroidPrebuilt or false)
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&& !(stdenv.targetPlatform.isiOS or false)
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&& gccForLibs != null;
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gccForLibs_solib = getLib gccForLibs
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+ optionalString (targetPlatform != hostPlatform) "/${targetPlatform.config}";
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# Analogously to cc_solib and gccForLibs_solib
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libcxx_solib = "${lib.getLib libcxx}/lib";
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# The following two functions, `isGccArchSupported` and
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# `isGccTuneSupported`, only handle those situations where a flag
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# (`-march` or `-mtune`) is accepted by one compiler but rejected
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# by another, and both compilers are relevant to nixpkgs. We are
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# not trying to maintain a complete list of all flags accepted by
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# all versions of all compilers ever in nixpkgs.
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#
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# The two main cases of interest are:
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#
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# - One compiler is gcc and the other is clang
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# - One compiler is pkgs.gcc and the other is bootstrap-files.gcc
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# -- older compilers (for example bootstrap's GCC 5) fail with
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# -march=too-modern-cpu
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isGccArchSupported = arch:
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if targetPlatform.isPower then false else # powerpc does not allow -march=
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if isGNU then
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{ # Generic
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x86-64-v2 = versionAtLeast ccVersion "11.0";
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x86-64-v3 = versionAtLeast ccVersion "11.0";
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x86-64-v4 = versionAtLeast ccVersion "11.0";
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# Intel
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skylake = versionAtLeast ccVersion "6.0";
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skylake-avx512 = versionAtLeast ccVersion "6.0";
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cannonlake = versionAtLeast ccVersion "8.0";
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icelake-client = versionAtLeast ccVersion "8.0";
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icelake-server = versionAtLeast ccVersion "8.0";
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cascadelake = versionAtLeast ccVersion "9.0";
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cooperlake = versionAtLeast ccVersion "10.0";
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tigerlake = versionAtLeast ccVersion "10.0";
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knm = versionAtLeast ccVersion "8.0";
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alderlake = versionAtLeast ccVersion "12.0";
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# AMD
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znver1 = versionAtLeast ccVersion "6.0";
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znver2 = versionAtLeast ccVersion "9.0";
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znver3 = versionAtLeast ccVersion "11.0";
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znver4 = versionAtLeast ccVersion "13.0";
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}.${arch} or true
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else if isClang then
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{ #Generic
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x86-64-v2 = versionAtLeast ccVersion "12.0";
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x86-64-v3 = versionAtLeast ccVersion "12.0";
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x86-64-v4 = versionAtLeast ccVersion "12.0";
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# Intel
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cannonlake = versionAtLeast ccVersion "5.0";
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icelake-client = versionAtLeast ccVersion "7.0";
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icelake-server = versionAtLeast ccVersion "7.0";
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knm = versionAtLeast ccVersion "7.0";
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alderlake = versionAtLeast ccVersion "16.0";
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# AMD
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znver1 = versionAtLeast ccVersion "4.0";
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znver2 = versionAtLeast ccVersion "9.0";
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znver3 = versionAtLeast ccVersion "12.0";
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znver4 = versionAtLeast ccVersion "16.0";
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}.${arch} or true
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else
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false;
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isGccTuneSupported = tune:
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# for x86 -mtune= takes the same values as -march, plus two more:
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if targetPlatform.isx86 then
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{
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generic = true;
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intel = true;
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}.${tune} or (isGccArchSupported tune)
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# on arm64, the -mtune= values are specific processors
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else if targetPlatform.isAarch64 then
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(if isGNU then
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{
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cortex-a53 = versionAtLeast ccVersion "4.8"; # gcc 8c075f
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cortex-a72 = versionAtLeast ccVersion "5.1"; # gcc d8f70d
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"cortex-a72.cortex-a53" = versionAtLeast ccVersion "5.1"; # gcc d8f70d
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}.${tune} or false
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else if isClang then
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{
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cortex-a53 = versionAtLeast ccVersion "3.9"; # llvm dfc5d1
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}.${tune} or false
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else false)
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else if targetPlatform.isPower then
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# powerpc does not support -march
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true
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else if targetPlatform.isMips then
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# for mips -mtune= takes the same values as -march
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isGccArchSupported tune
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else
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false;
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# Clang does not support as many `-mtune=` values as gcc does;
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# this function will return the best possible approximation of the
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# provided `-mtune=` value, or `null` if none exists.
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#
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# Note: this function can make use of ccVersion; for example, `if
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# versionOlder ccVersion "12" then ...`
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findBestTuneApproximation = tune:
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let guess = if isClang
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then {
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# clang does not tune for big.LITTLE chips
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"cortex-a72.cortex-a53" = "cortex-a72";
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}.${tune} or tune
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else tune;
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in if isGccTuneSupported guess
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then guess
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else null;
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defaultHardeningFlags = bintools.defaultHardeningFlags or [];
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# if cc.hardeningUnsupportedFlagsByTargetPlatform exists, this is
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# called with the targetPlatform as an argument and
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# cc.hardeningUnsupportedFlags is completely ignored - the function
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# is responsible for including the constant hardeningUnsupportedFlags
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# list however it sees fit.
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ccHardeningUnsupportedFlags = if cc ? hardeningUnsupportedFlagsByTargetPlatform
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then cc.hardeningUnsupportedFlagsByTargetPlatform targetPlatform
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else (cc.hardeningUnsupportedFlags or []);
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darwinPlatformForCC = optionalString stdenv.targetPlatform.isDarwin (
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if (targetPlatform.darwinPlatform == "macos" && isGNU) then "macosx"
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else targetPlatform.darwinPlatform
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);
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darwinMinVersion = optionalString stdenv.targetPlatform.isDarwin (
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stdenv.targetPlatform.darwinMinVersion
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);
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darwinMinVersionVariable = optionalString stdenv.targetPlatform.isDarwin
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stdenv.targetPlatform.darwinMinVersionVariable;
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in
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assert includeFortifyHeaders' -> fortify-headers != null;
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# Ensure bintools matches
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assert libc_bin == bintools.libc_bin;
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assert libc_dev == bintools.libc_dev;
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assert libc_lib == bintools.libc_lib;
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assert nativeTools == bintools.nativeTools;
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assert nativeLibc == bintools.nativeLibc;
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assert nativePrefix == bintools.nativePrefix;
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stdenv.mkDerivation {
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pname = targetPrefix
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+ (if name != "" then name else "${ccName}-wrapper");
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version = optionalString (cc != null) ccVersion;
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preferLocalBuild = true;
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outputs = [ "out" ] ++ optionals propagateDoc [ "man" "info" ];
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passthru = {
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inherit targetPrefix suffixSalt;
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# "cc" is the generic name for a C compiler, but there is no one for package
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# providing the linker and related tools. The two we use now are GNU
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# Binutils, and Apple's "cctools"; "bintools" as an attempt to find an
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# unused middle-ground name that evokes both.
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inherit bintools;
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inherit cc libc libcxx nativeTools nativeLibc nativePrefix isGNU isClang;
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emacsBufferSetup = pkgs: ''
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; We should handle propagation here too
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(mapc
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(lambda (arg)
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(when (file-directory-p (concat arg "/include"))
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(setenv "NIX_CFLAGS_COMPILE_${suffixSalt}" (concat (getenv "NIX_CFLAGS_COMPILE_${suffixSalt}") " -isystem " arg "/include"))))
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'(${concatStringsSep " " (map (pkg: "\"${pkg}\"") pkgs)}))
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'';
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inherit expand-response-params;
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inherit nixSupport;
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inherit defaultHardeningFlags;
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};
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dontBuild = true;
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dontConfigure = true;
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enableParallelBuilding = true;
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unpackPhase = ''
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src=$PWD
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'';
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wrapper = ./cc-wrapper.sh;
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installPhase =
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''
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mkdir -p $out/bin $out/nix-support
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wrap() {
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local dst="$1"
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local wrapper="$2"
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export prog="$3"
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export use_response_file_by_default=${if isClang && !isCcache then "1" else "0"}
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substituteAll "$wrapper" "$out/bin/$dst"
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chmod +x "$out/bin/$dst"
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}
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''
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+ (if nativeTools then ''
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echo ${if targetPlatform.isDarwin then cc else nativePrefix} > $out/nix-support/orig-cc
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ccPath="${if targetPlatform.isDarwin then cc else nativePrefix}/bin"
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'' else ''
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echo $cc > $out/nix-support/orig-cc
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ccPath="${cc}/bin"
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'')
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# Create symlinks to everything in the bintools wrapper.
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+ ''
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for bbin in $bintools/bin/*; do
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mkdir -p "$out/bin"
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ln -s "$bbin" "$out/bin/$(basename $bbin)"
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done
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''
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# We export environment variables pointing to the wrapped nonstandard
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# cmds, lest some lousy configure script use those to guess compiler
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# version.
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+ ''
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export named_cc=${targetPrefix}cc
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export named_cxx=${targetPrefix}c++
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if [ -e $ccPath/${targetPrefix}gcc ]; then
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wrap ${targetPrefix}gcc $wrapper $ccPath/${targetPrefix}gcc
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ln -s ${targetPrefix}gcc $out/bin/${targetPrefix}cc
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export named_cc=${targetPrefix}gcc
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export named_cxx=${targetPrefix}g++
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elif [ -e $ccPath/clang ]; then
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wrap ${targetPrefix}clang $wrapper $ccPath/clang
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ln -s ${targetPrefix}clang $out/bin/${targetPrefix}cc
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export named_cc=${targetPrefix}clang
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export named_cxx=${targetPrefix}clang++
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fi
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if [ -e $ccPath/${targetPrefix}g++ ]; then
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wrap ${targetPrefix}g++ $wrapper $ccPath/${targetPrefix}g++
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ln -s ${targetPrefix}g++ $out/bin/${targetPrefix}c++
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elif [ -e $ccPath/clang++ ]; then
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wrap ${targetPrefix}clang++ $wrapper $ccPath/clang++
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ln -s ${targetPrefix}clang++ $out/bin/${targetPrefix}c++
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fi
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if [ -e $ccPath/${targetPrefix}cpp ]; then
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wrap ${targetPrefix}cpp $wrapper $ccPath/${targetPrefix}cpp
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elif [ -e $ccPath/cpp ]; then
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wrap ${targetPrefix}cpp $wrapper $ccPath/cpp
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fi
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''
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# No need to wrap gnat, gnatkr, gnatname or gnatprep; we can just symlink them in
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+ optionalString cc.langAda or false ''
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for cmd in gnatbind gnatchop gnatclean gnatlink gnatls gnatmake; do
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wrap ${targetPrefix}$cmd ${./gnat-wrapper.sh} $ccPath/${targetPrefix}$cmd
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done
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for cmd in gnat gnatkr gnatname gnatprep; do
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ln -s $ccPath/${targetPrefix}$cmd $out/bin/${targetPrefix}$cmd
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done
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# this symlink points to the unwrapped gnat's output "out". It is used by
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# our custom gprconfig compiler description to find GNAT's ada runtime. See
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# ../../development/ada-modules/gprbuild/{boot.nix, nixpkgs-gnat.xml}
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ln -sf ${cc} $out/nix-support/gprconfig-gnat-unwrapped
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''
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+ optionalString cc.langD or false ''
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wrap ${targetPrefix}gdc $wrapper $ccPath/${targetPrefix}gdc
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''
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+ optionalString cc.langFortran or false ''
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wrap ${targetPrefix}gfortran $wrapper $ccPath/${targetPrefix}gfortran
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ln -sv ${targetPrefix}gfortran $out/bin/${targetPrefix}g77
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ln -sv ${targetPrefix}gfortran $out/bin/${targetPrefix}f77
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export named_fc=${targetPrefix}gfortran
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''
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+ optionalString cc.langJava or false ''
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wrap ${targetPrefix}gcj $wrapper $ccPath/${targetPrefix}gcj
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''
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+ optionalString cc.langGo or false ''
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wrap ${targetPrefix}gccgo $wrapper $ccPath/${targetPrefix}gccgo
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wrap ${targetPrefix}go ${./go-wrapper.sh} $ccPath/${targetPrefix}go
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'';
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strictDeps = true;
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propagatedBuildInputs = [ bintools ] ++ extraTools ++ optionals cc.langD or cc.langJava or false [ zlib ];
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depsTargetTargetPropagated = optional (libcxx != null) libcxx ++ extraPackages;
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setupHooks = [
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../setup-hooks/role.bash
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] ++ lib.optional (cc.langC or true) ./setup-hook.sh
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++ lib.optional (cc.langFortran or false) ./fortran-hook.sh
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++ lib.optional (targetPlatform.isWindows) (stdenv.mkDerivation {
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name = "win-dll-hook.sh";
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dontUnpack = true;
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installPhase = ''
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echo addToSearchPath "LINK_DLL_FOLDERS" "${cc_solib}/lib" > $out
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echo addToSearchPath "LINK_DLL_FOLDERS" "${cc_solib}/lib64" >> $out
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echo addToSearchPath "LINK_DLL_FOLDERS" "${cc_solib}/lib32" >> $out
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'';
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});
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postFixup =
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# Ensure flags files exists, as some other programs cat them. (That these
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# are considered an exposed interface is a bit dubious, but fine for now.)
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''
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touch "$out/nix-support/cc-cflags"
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touch "$out/nix-support/cc-ldflags"
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''
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# Backwards compatibility for packages expecting this file, e.g. with
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# `$NIX_CC/nix-support/dynamic-linker`.
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#
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# TODO(@Ericson2314): Remove this after stable release and force
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# everyone to refer to bintools-wrapper directly.
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+ ''
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if [[ -f "$bintools/nix-support/dynamic-linker" ]]; then
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ln -s "$bintools/nix-support/dynamic-linker" "$out/nix-support"
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fi
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if [[ -f "$bintools/nix-support/dynamic-linker-m32" ]]; then
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ln -s "$bintools/nix-support/dynamic-linker-m32" "$out/nix-support"
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fi
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''
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##
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## GCC libs for non-GCC support
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##
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+ optionalString (useGccForLibs && isClang) ''
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|
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echo "-B${gccForLibs}/lib/gcc/${targetPlatform.config}/${gccForLibs.version}" >> $out/nix-support/cc-cflags
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''
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+ optionalString useGccForLibs ''
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echo "-L${gccForLibs}/lib/gcc/${targetPlatform.config}/${gccForLibs.version}" >> $out/nix-support/cc-ldflags
|
|
echo "-L${gccForLibs_solib}/lib" >> $out/nix-support/cc-ldflags
|
|
''
|
|
|
|
# TODO We would like to connect this to `useGccForLibs`, but we cannot yet
|
|
# because `libcxxStdenv` on linux still needs this. Maybe someday we'll
|
|
# always set `useLLVM` on Darwin, and maybe also break down `useLLVM` into
|
|
# fine-grained use flags (libgcc vs compiler-rt, ld.lld vs legacy, libc++
|
|
# vs libstdc++, etc.) since Darwin isn't `useLLVM` on all counts. (See
|
|
# https://clang.llvm.org/docs/Toolchain.html for all the axes one might
|
|
# break `useLLVM` into.)
|
|
+ optionalString (isClang
|
|
&& targetPlatform.isLinux
|
|
&& !(stdenv.targetPlatform.useAndroidPrebuilt or false)
|
|
&& !(stdenv.targetPlatform.useLLVM or false)
|
|
&& gccForLibs != null) (''
|
|
echo "--gcc-toolchain=${gccForLibs}" >> $out/nix-support/cc-cflags
|
|
|
|
# Pull in 'cc.out' target to get 'libstdc++fs.a'. It should be in
|
|
# 'cc.lib'. But it's a gcc package bug.
|
|
# TODO(trofi): remove once gcc is fixed to move libraries to .lib output.
|
|
echo "-L${gccForLibs}/${optionalString (targetPlatform != hostPlatform) "/${targetPlatform.config}"}/lib" >> $out/nix-support/cc-ldflags
|
|
''
|
|
# this ensures that when clang passes -lgcc_s to lld (as it does
|
|
# when building e.g. firefox), lld is able to find libgcc_s.so
|
|
+ concatMapStrings (libgcc: ''
|
|
echo "-L${libgcc}/lib" >> $out/nix-support/cc-ldflags
|
|
'') (lib.toList (gccForLibs.libgcc or [])))
|
|
|
|
##
|
|
## General libc support
|
|
##
|
|
|
|
# The "-B${libc_lib}/lib/" flag is a quick hack to force gcc to link
|
|
# against the crt1.o from our own glibc, rather than the one in
|
|
# /usr/lib. (This is only an issue when using an `impure'
|
|
# compiler/linker, i.e., one that searches /usr/lib and so on.)
|
|
#
|
|
# Unfortunately, setting -B appears to override the default search
|
|
# path. Thus, the gcc-specific "../includes-fixed" directory is
|
|
# now longer searched and glibc's <limits.h> header fails to
|
|
# compile, because it uses "#include_next <limits.h>" to find the
|
|
# limits.h file in ../includes-fixed. To remedy the problem,
|
|
# another -idirafter is necessary to add that directory again.
|
|
+ optionalString (libc != null) (''
|
|
touch "$out/nix-support/libc-cflags"
|
|
touch "$out/nix-support/libc-ldflags"
|
|
echo "-B${libc_lib}${libc.libdir or "/lib/"}" >> $out/nix-support/libc-crt1-cflags
|
|
'' + optionalString (!(cc.langD or false)) ''
|
|
echo "-idirafter ${libc_dev}${libc.incdir or "/include"}" >> $out/nix-support/libc-cflags
|
|
'' + optionalString (isGNU && (!(cc.langD or false))) ''
|
|
for dir in "${cc}"/lib/gcc/*/*/include-fixed; do
|
|
echo '-idirafter' ''${dir} >> $out/nix-support/libc-cflags
|
|
done
|
|
'' + ''
|
|
|
|
echo "${libc_lib}" > $out/nix-support/orig-libc
|
|
echo "${libc_dev}" > $out/nix-support/orig-libc-dev
|
|
''
|
|
# fortify-headers is a set of wrapper headers that augment libc
|
|
# and use #include_next to pass through to libc's true
|
|
# implementations, so must appear before them in search order.
|
|
# in theory a correctly placed -idirafter could be used, but in
|
|
# practice the compiler may have been built with a --with-headers
|
|
# like option that forces the libc headers before all -idirafter,
|
|
# hence -isystem here.
|
|
+ optionalString includeFortifyHeaders' ''
|
|
echo "-isystem ${fortify-headers}/include" >> $out/nix-support/libc-cflags
|
|
'')
|
|
|
|
##
|
|
## General libc++ support
|
|
##
|
|
|
|
# We have a libc++ directly, we have one via "smuggled" GCC, or we have one
|
|
# bundled with the C compiler because it is GCC
|
|
+ optionalString (libcxx != null || (useGccForLibs && gccForLibs.langCC or false) || (isGNU && cc.langCC or false)) ''
|
|
touch "$out/nix-support/libcxx-cxxflags"
|
|
touch "$out/nix-support/libcxx-ldflags"
|
|
''
|
|
# Adding -isystem flags should be done only for clang; gcc
|
|
# already knows how to find its own libstdc++, and adding
|
|
# additional -isystem flags will confuse gfortran (see
|
|
# https://github.com/NixOS/nixpkgs/pull/209870#issuecomment-1500550903)
|
|
+ optionalString (libcxx == null && isClang && (useGccForLibs && gccForLibs.langCC or false)) ''
|
|
for dir in ${gccForLibs}/include/c++/*; do
|
|
echo "-isystem $dir" >> $out/nix-support/libcxx-cxxflags
|
|
done
|
|
for dir in ${gccForLibs}/include/c++/*/${targetPlatform.config}; do
|
|
echo "-isystem $dir" >> $out/nix-support/libcxx-cxxflags
|
|
done
|
|
''
|
|
+ optionalString (libcxx.isLLVM or false) ''
|
|
echo "-isystem ${lib.getDev libcxx}/include/c++/v1" >> $out/nix-support/libcxx-cxxflags
|
|
echo "-isystem ${lib.getDev libcxx.cxxabi}/include/c++/v1" >> $out/nix-support/libcxx-cxxflags
|
|
echo "-stdlib=libc++" >> $out/nix-support/libcxx-ldflags
|
|
echo "-l${libcxx.cxxabi.libName}" >> $out/nix-support/libcxx-ldflags
|
|
''
|
|
|
|
##
|
|
## Initial CFLAGS
|
|
##
|
|
|
|
# GCC shows ${cc_solib}/lib in `gcc -print-search-dirs', but not
|
|
# ${cc_solib}/lib64 (even though it does actually search there...)..
|
|
# This confuses libtool. So add it to the compiler tool search
|
|
# path explicitly.
|
|
+ optionalString (!nativeTools) ''
|
|
if [ -e "${cc_solib}/lib64" -a ! -L "${cc_solib}/lib64" ]; then
|
|
ccLDFlags+=" -L${cc_solib}/lib64"
|
|
ccCFlags+=" -B${cc_solib}/lib64"
|
|
fi
|
|
ccLDFlags+=" -L${cc_solib}/lib"
|
|
ccCFlags+=" -B${cc_solib}/lib"
|
|
|
|
'' + optionalString cc.langAda or false ''
|
|
touch "$out/nix-support/gnat-cflags"
|
|
touch "$out/nix-support/gnat-ldflags"
|
|
basePath=$(echo $cc/lib/*/*/*)
|
|
ccCFlags+=" -B$basePath -I$basePath/adainclude"
|
|
gnatCFlags="-I$basePath/adainclude -I$basePath/adalib"
|
|
|
|
echo "$gnatCFlags" >> $out/nix-support/gnat-cflags
|
|
'' + ''
|
|
echo "$ccLDFlags" >> $out/nix-support/cc-ldflags
|
|
echo "$ccCFlags" >> $out/nix-support/cc-cflags
|
|
'' + optionalString (targetPlatform.isDarwin && (libcxx != null) && (cc.isClang or false)) ''
|
|
echo " -L${libcxx_solib}" >> $out/nix-support/cc-ldflags
|
|
''
|
|
|
|
##
|
|
## Man page and info support
|
|
##
|
|
+ optionalString propagateDoc ''
|
|
ln -s ${cc.man} $man
|
|
ln -s ${cc.info} $info
|
|
'' + optionalString (cc.langD or cc.langJava or false) ''
|
|
echo "-B${zlib}${zlib.libdir or "/lib/"}" >> $out/nix-support/libc-cflags
|
|
''
|
|
|
|
##
|
|
## Hardening support
|
|
##
|
|
+ ''
|
|
export hardening_unsupported_flags="${builtins.concatStringsSep " " ccHardeningUnsupportedFlags}"
|
|
''
|
|
|
|
# Machine flags. These are necessary to support
|
|
|
|
# TODO: We should make a way to support miscellaneous machine
|
|
# flags and other gcc flags as well.
|
|
|
|
# Always add -march based on cpu in triple. Sometimes there is a
|
|
# discrepency (x86_64 vs. x86-64), so we provide an "arch" arg in
|
|
# that case.
|
|
# TODO: aarch64-darwin has mcpu incompatible with gcc
|
|
+ optionalString ((targetPlatform ? gcc.arch) && (isClang || !(stdenv.isDarwin && stdenv.isAarch64)) &&
|
|
isGccArchSupported targetPlatform.gcc.arch) ''
|
|
echo "-march=${targetPlatform.gcc.arch}" >> $out/nix-support/cc-cflags-before
|
|
''
|
|
|
|
# -mcpu is not very useful, except on PowerPC where it is used
|
|
# instead of march. On all other platforms you should use mtune
|
|
# and march instead.
|
|
# TODO: aarch64-darwin has mcpu incompatible with gcc
|
|
+ optionalString ((targetPlatform ? gcc.cpu) && (isClang || !(stdenv.isDarwin && stdenv.isAarch64))) ''
|
|
echo "-mcpu=${targetPlatform.gcc.cpu}" >> $out/nix-support/cc-cflags-before
|
|
''
|
|
|
|
# -mfloat-abi only matters on arm32 but we set it here
|
|
# unconditionally just in case. If the abi specifically sets hard
|
|
# vs. soft floats we use it here.
|
|
+ optionalString (targetPlatform ? gcc.float-abi) ''
|
|
echo "-mfloat-abi=${targetPlatform.gcc.float-abi}" >> $out/nix-support/cc-cflags-before
|
|
''
|
|
+ optionalString (targetPlatform ? gcc.fpu) ''
|
|
echo "-mfpu=${targetPlatform.gcc.fpu}" >> $out/nix-support/cc-cflags-before
|
|
''
|
|
+ optionalString (targetPlatform ? gcc.mode) ''
|
|
echo "-mmode=${targetPlatform.gcc.mode}" >> $out/nix-support/cc-cflags-before
|
|
''
|
|
+ optionalString (targetPlatform ? gcc.thumb) ''
|
|
echo "-m${if targetPlatform.gcc.thumb then "thumb" else "arm"}" >> $out/nix-support/cc-cflags-before
|
|
''
|
|
+ (let tune = if targetPlatform ? gcc.tune
|
|
then findBestTuneApproximation targetPlatform.gcc.tune
|
|
else null;
|
|
in optionalString (tune != null) ''
|
|
echo "-mtune=${tune}" >> $out/nix-support/cc-cflags-before
|
|
'')
|
|
|
|
# TODO: categorize these and figure out a better place for them
|
|
+ optionalString targetPlatform.isWindows ''
|
|
hardening_unsupported_flags+=" pic"
|
|
'' + optionalString targetPlatform.isMinGW ''
|
|
hardening_unsupported_flags+=" stackprotector fortify"
|
|
'' + optionalString targetPlatform.isAvr ''
|
|
hardening_unsupported_flags+=" stackprotector pic"
|
|
'' + optionalString (targetPlatform.libc == "newlib" || targetPlatform.libc == "newlib-nano") ''
|
|
hardening_unsupported_flags+=" stackprotector fortify pie pic"
|
|
'' + optionalString (targetPlatform.libc == "musl" && targetPlatform.isx86_32) ''
|
|
hardening_unsupported_flags+=" stackprotector"
|
|
'' + optionalString targetPlatform.isNetBSD ''
|
|
hardening_unsupported_flags+=" stackprotector fortify"
|
|
'' + optionalString cc.langAda or false ''
|
|
hardening_unsupported_flags+=" format stackprotector strictoverflow"
|
|
'' + optionalString cc.langD or false ''
|
|
hardening_unsupported_flags+=" format"
|
|
'' + optionalString cc.langFortran or false ''
|
|
hardening_unsupported_flags+=" format"
|
|
'' + optionalString targetPlatform.isWasm ''
|
|
hardening_unsupported_flags+=" stackprotector fortify pie pic"
|
|
'' + optionalString targetPlatform.isMicroBlaze ''
|
|
hardening_unsupported_flags+=" stackprotector"
|
|
''
|
|
|
|
+ optionalString stdenv.targetPlatform.isDarwin ''
|
|
echo "-arch ${targetPlatform.darwinArch}" >> $out/nix-support/cc-cflags
|
|
''
|
|
|
|
+ optionalString targetPlatform.isAndroid ''
|
|
echo "-D__ANDROID_API__=${targetPlatform.sdkVer}" >> $out/nix-support/cc-cflags
|
|
''
|
|
|
|
# There are a few tools (to name one libstdcxx5) which do not work
|
|
# well with multi line flags, so make the flags single line again
|
|
+ ''
|
|
for flags in "$out/nix-support"/*flags*; do
|
|
substituteInPlace "$flags" --replace $'\n' ' '
|
|
done
|
|
|
|
substituteAll ${./add-flags.sh} $out/nix-support/add-flags.sh
|
|
substituteAll ${./add-hardening.sh} $out/nix-support/add-hardening.sh
|
|
substituteAll ${../wrapper-common/utils.bash} $out/nix-support/utils.bash
|
|
''
|
|
|
|
+ optionalString cc.langAda or false ''
|
|
substituteAll ${./add-gnat-extra-flags.sh} $out/nix-support/add-gnat-extra-flags.sh
|
|
''
|
|
|
|
##
|
|
## General Clang support
|
|
## Needs to go after ^ because the for loop eats \n and makes this file an invalid script
|
|
##
|
|
+ optionalString isClang ''
|
|
export defaultTarget=${targetPlatform.config}
|
|
substituteAll ${./add-clang-cc-cflags-before.sh} $out/nix-support/add-local-cc-cflags-before.sh
|
|
''
|
|
|
|
##
|
|
## Extra custom steps
|
|
##
|
|
+ extraBuildCommands
|
|
+ lib.strings.concatStringsSep "; "
|
|
(lib.attrsets.mapAttrsToList
|
|
(name: value: "echo ${toString value} >> $out/nix-support/${name}")
|
|
nixSupport);
|
|
|
|
|
|
env = {
|
|
inherit isClang;
|
|
|
|
# for substitution in utils.bash
|
|
expandResponseParams = "${expand-response-params}/bin/expand-response-params";
|
|
shell = getBin shell + shell.shellPath or "";
|
|
gnugrep_bin = optionalString (!nativeTools) gnugrep;
|
|
# stdenv.cc.cc should not be null and we have nothing better for now.
|
|
# if the native impure bootstrap is gotten rid of this can become `inherit cc;` again.
|
|
cc = optionalString (!nativeTools) cc;
|
|
wrapperName = "CC_WRAPPER";
|
|
inherit suffixSalt coreutils_bin bintools;
|
|
inherit libc_bin libc_dev libc_lib;
|
|
inherit darwinPlatformForCC darwinMinVersion darwinMinVersionVariable;
|
|
default_hardening_flags_str = builtins.toString defaultHardeningFlags;
|
|
};
|
|
|
|
meta =
|
|
let cc_ = lib.optionalAttrs (cc != null) cc; in
|
|
(lib.optionalAttrs (cc_ ? meta) (removeAttrs cc.meta ["priority"])) //
|
|
{ description =
|
|
lib.attrByPath ["meta" "description"] "System C compiler" cc_
|
|
+ " (wrapper script)";
|
|
priority = 10;
|
|
mainProgram = if name != "" then name else ccName;
|
|
};
|
|
}
|