# The Nixpkgs CC is not directly usable, since it doesn't know where
# the C library and standard header files are. Therefore the compiler
# produced by that package cannot be installed directly in a user
# environment and used from the command line. So we use a wrapper
# script that sets up the right environment variables so that the
# compiler and the linker just "work".
{ name ? ""
, lib
, stdenvNoCC
, runtimeShell
, cc ? null, libc ? null, bintools, coreutils ? null
, apple-sdk ? null
, zlib ? null
, nativeTools, noLibc ? false, nativeLibc, nativePrefix ? ""
, propagateDoc ? cc != null && cc ? man
, extraTools ? [], extraPackages ? [], extraBuildCommands ? ""
, nixSupport ? {}
, isGNU ? false, isClang ? cc.isClang or false, isZig ? cc.isZig or false
, isArocc ? cc.isArocc or false, isCcache ? cc.isCcache or false
, gnugrep ? null
, expand-response-params
, libcxx ? null
# Whether or not to add `-B` and `-L` to `nix-support/cc-{c,ld}flags`
, useCcForLibs ?
# Always add these flags for Clang, because in order to compile (most
# software) it needs libraries that are shipped and compiled with gcc.
if isClang then true
# Never add these flags for a build!=host cross-compiler or a host!=target
# ("cross-built-native") compiler; currently nixpkgs has a special build
# path for these (`crossStageStatic`). Hopefully at some point that build
# path will be merged with this one and this conditional will be removed.
else if (with stdenvNoCC; buildPlatform != hostPlatform || hostPlatform != targetPlatform) then false
# Never add these flags when wrapping the bootstrapFiles' compiler; it has a
# /usr/-like layout with everything smashed into a single outpath, so it has
# no trouble finding its own libraries.
else if (cc.passthru.isFromBootstrapFiles or false) then false
# Add these flags when wrapping `xgcc` (the first compiler that nixpkgs builds)
else if (cc.passthru.isXgcc or false) then true
# Add these flags when wrapping `stdenv.cc`
else if (cc.stdenv.cc.cc.passthru.isXgcc or false) then true
# Do not add these flags in any other situation. This is `false` mainly to
# prevent these flags from being added when wrapping *old* versions of gcc
# (e.g. `gcc6Stdenv`), since they will cause the old gcc to get `-B` and
# `-L` flags pointing at the new gcc's libstdc++ headers. Example failure:
# https://hydra.nixos.org/build/213125495
else false
# the derivation at which the `-B` and `-L` flags added by `useCcForLibs` will point
, gccForLibs ? if useCcForLibs then cc else null
, fortify-headers ? null
, includeFortifyHeaders ? null
}:
assert nativeTools -> !propagateDoc && nativePrefix != "";
assert !nativeTools -> cc != null && coreutils != null && gnugrep != null;
assert !(nativeLibc && noLibc);
assert (noLibc || nativeLibc) == (libc == null);
let
inherit (lib)
attrByPath
concatMapStrings
concatStringsSep
escapeShellArg
escapeShellArgs
getBin
getDev
getLib
getName
getVersion
mapAttrsToList
optional
optionalAttrs
optionals
optionalString
removePrefix
replaceStrings
toList
versionAtLeast
;
inherit (stdenvNoCC) hostPlatform targetPlatform;
includeFortifyHeaders' = if includeFortifyHeaders != null
then includeFortifyHeaders
else (targetPlatform.libc == "musl" && isGNU);
# Prefix for binaries. Customarily ends with a dash separator.
#
# TODO(@Ericson2314) Make unconditional, or optional but always true by default.
targetPrefix = optionalString (targetPlatform != hostPlatform) (targetPlatform.config + "-");
ccVersion = getVersion cc;
ccName = removePrefix targetPrefix (getName cc);
libc_bin = optionalString (libc != null) (getBin libc);
libc_dev = optionalString (libc != null) (getDev libc);
libc_lib = optionalString (libc != null) (getLib libc);
cc_solib = getLib cc
+ optionalString (targetPlatform != hostPlatform) "/${targetPlatform.config}";
# The wrapper scripts use 'cat' and 'grep', so we may need coreutils.
coreutils_bin = optionalString (!nativeTools) (getBin coreutils);
# The "suffix salt" is a arbitrary string added in the end of env vars
# defined by cc-wrapper's hooks so that multiple cc-wrappers can be used
# without interfering. For the moment, it is defined as the target triple,
# adjusted to be a valid bash identifier. This should be considered an
# unstable implementation detail, however.
suffixSalt = replaceStrings ["-" "."] ["_" "_"] targetPlatform.config
+ lib.optionalString (targetPlatform.isDarwin && targetPlatform.isStatic) "_static";
useGccForLibs = useCcForLibs
&& libcxx == null
&& !targetPlatform.isDarwin
&& !(targetPlatform.useLLVM or false)
&& !(targetPlatform.useAndroidPrebuilt or false)
&& !(targetPlatform.isiOS or false)
&& gccForLibs != null;
gccForLibs_solib = getLib gccForLibs
+ optionalString (targetPlatform != hostPlatform) "/${targetPlatform.config}";
# Analogously to cc_solib and gccForLibs_solib
libcxx_solib = "${getLib libcxx}/lib";
# The following two functions, `isGccArchSupported` and
# `isGccTuneSupported`, only handle those situations where a flag
# (`-march` or `-mtune`) is accepted by one compiler but rejected
# by another, and both compilers are relevant to nixpkgs. We are
# not trying to maintain a complete list of all flags accepted by
# all versions of all compilers ever in nixpkgs.
#
# The two main cases of interest are:
#
# - One compiler is gcc and the other is clang
# - One compiler is pkgs.gcc and the other is bootstrap-files.gcc
# -- older compilers (for example bootstrap's GCC 5) fail with
# -march=too-modern-cpu
isGccArchSupported = arch:
if targetPlatform.isPower then false else # powerpc does not allow -march=
if isGNU then
{ # Generic
x86-64-v2 = versionAtLeast ccVersion "11.0";
x86-64-v3 = versionAtLeast ccVersion "11.0";
x86-64-v4 = versionAtLeast ccVersion "11.0";
# Intel
skylake = true;
skylake-avx512 = true;
cannonlake = versionAtLeast ccVersion "8.0";
icelake-client = versionAtLeast ccVersion "8.0";
icelake-server = versionAtLeast ccVersion "8.0";
cascadelake = versionAtLeast ccVersion "9.0";
cooperlake = versionAtLeast ccVersion "10.0";
tigerlake = versionAtLeast ccVersion "10.0";
knm = versionAtLeast ccVersion "8.0";
alderlake = versionAtLeast ccVersion "12.0";
sapphirerapids = versionAtLeast ccVersion "11.0";
emeraldrapids = versionAtLeast ccVersion "13.0";
# AMD
znver1 = true;
znver2 = versionAtLeast ccVersion "9.0";
znver3 = versionAtLeast ccVersion "11.0";
znver4 = versionAtLeast ccVersion "13.0";
}.${arch} or true
else if isClang then
{ #Generic
x86-64-v2 = versionAtLeast ccVersion "12.0";
x86-64-v3 = versionAtLeast ccVersion "12.0";
x86-64-v4 = versionAtLeast ccVersion "12.0";
# Intel
cannonlake = versionAtLeast ccVersion "5.0";
icelake-client = versionAtLeast ccVersion "7.0";
icelake-server = versionAtLeast ccVersion "7.0";
knm = versionAtLeast ccVersion "7.0";
alderlake = versionAtLeast ccVersion "16.0";
sapphirerapids = versionAtLeast ccVersion "12.0";
emeraldrapids = versionAtLeast ccVersion "16.0";
# AMD
znver1 = versionAtLeast ccVersion "4.0";
znver2 = versionAtLeast ccVersion "9.0";
znver3 = versionAtLeast ccVersion "12.0";
znver4 = versionAtLeast ccVersion "16.0";
}.${arch} or true
else
false;
isGccTuneSupported = tune:
# for x86 -mtune= takes the same values as -march, plus two more:
if targetPlatform.isx86 then
{
generic = true;
intel = true;
}.${tune} or (isGccArchSupported tune)
# on arm64, the -mtune= values are specific processors
else if targetPlatform.isAarch64 then
(if isGNU then
{
cortex-a53 = true;
cortex-a72 = true;
"cortex-a72.cortex-a53" = true;
}.${tune} or false
else if isClang then
{
cortex-a53 = versionAtLeast ccVersion "3.9"; # llvm dfc5d1
}.${tune} or false
else false)
else if targetPlatform.isPower then
# powerpc does not support -march
true
else if targetPlatform.isMips then
# for mips -mtune= takes the same values as -march
isGccArchSupported tune
else
false;
# Clang does not support as many `-mtune=` values as gcc does;
# this function will return the best possible approximation of the
# provided `-mtune=` value, or `null` if none exists.
#
# Note: this function can make use of ccVersion; for example, `if
# versionOlder ccVersion "12" then ...`
findBestTuneApproximation = tune:
let guess = if isClang
then {
# clang does not tune for big.LITTLE chips
"cortex-a72.cortex-a53" = "cortex-a72";
}.${tune} or tune
else tune;
in if isGccTuneSupported guess
then guess
else null;
thumb = if targetPlatform.gcc.thumb then "thumb" else "arm";
tune = if targetPlatform ? gcc.tune
then findBestTuneApproximation targetPlatform.gcc.tune
else null;
# Machine flags. These are necessary to support
# TODO: We should make a way to support miscellaneous machine
# flags and other gcc flags as well.
machineFlags =
# Always add -march based on cpu in triple. Sometimes there is a
# discrepency (x86_64 vs. x86-64), so we provide an "arch" arg in
# that case.
optional (targetPlatform ? gcc.arch && !(targetPlatform.isDarwin && targetPlatform.isAarch64) && isGccArchSupported targetPlatform.gcc.arch) "-march=${targetPlatform.gcc.arch}" ++
# TODO: aarch64-darwin has mcpu incompatible with gcc
optional (targetPlatform ? gcc.cpu && !(targetPlatform.isDarwin && targetPlatform.isAarch64)) "-mcpu=${targetPlatform.gcc.cpu}" ++
# -mfloat-abi only matters on arm32 but we set it here
# unconditionally just in case. If the abi specifically sets hard
# vs. soft floats we use it here.
optional (targetPlatform ? gcc.float-abi) "-mfloat-abi=${targetPlatform.gcc.float-abi}" ++
optional (targetPlatform ? gcc.fpu) "-mfpu=${targetPlatform.gcc.fpu}" ++
optional (targetPlatform ? gcc.mode) "-mmode=${targetPlatform.gcc.mode}" ++
optional (targetPlatform ? gcc.thumb) "-m${thumb}" ++
optional (tune != null) "-mtune=${tune}";
defaultHardeningFlags = bintools.defaultHardeningFlags or [];
# if cc.hardeningUnsupportedFlagsByTargetPlatform exists, this is
# called with the targetPlatform as an argument and
# cc.hardeningUnsupportedFlags is completely ignored - the function
# is responsible for including the constant hardeningUnsupportedFlags
# list however it sees fit.
ccHardeningUnsupportedFlags = if cc ? hardeningUnsupportedFlagsByTargetPlatform
then cc.hardeningUnsupportedFlagsByTargetPlatform targetPlatform
else (cc.hardeningUnsupportedFlags or []);
darwinPlatformForCC = optionalString targetPlatform.isDarwin (
if (targetPlatform.darwinPlatform == "macos" && isGNU) then "macosx"
else targetPlatform.darwinPlatform
);
darwinMinVersion = optionalString targetPlatform.isDarwin (
targetPlatform.darwinMinVersion
);
darwinMinVersionVariable = optionalString targetPlatform.isDarwin
targetPlatform.darwinMinVersionVariable;
in
assert includeFortifyHeaders' -> fortify-headers != null;
# Ensure bintools matches
assert libc_bin == bintools.libc_bin;
assert libc_dev == bintools.libc_dev;
assert libc_lib == bintools.libc_lib;
assert nativeTools == bintools.nativeTools;
assert nativeLibc == bintools.nativeLibc;
assert nativePrefix == bintools.nativePrefix;
stdenvNoCC.mkDerivation {
pname = targetPrefix
+ (if name != "" then name else "${ccName}-wrapper");
version = optionalString (cc != null) ccVersion;
preferLocalBuild = true;
outputs = [ "out" ] ++ optionals propagateDoc [ "man" "info" ];
# Cannot be in "passthru" due to "substituteAll"
inherit isArocc;
passthru = {
inherit targetPrefix suffixSalt;
# "cc" is the generic name for a C compiler, but there is no one for package
# providing the linker and related tools. The two we use now are GNU
# Binutils, and Apple's "cctools"; "bintools" as an attempt to find an
# unused middle-ground name that evokes both.
inherit bintools;
inherit cc libc libcxx nativeTools nativeLibc nativePrefix isGNU isClang isZig;
emacsBufferSetup = pkgs: ''
; We should handle propagation here too
(mapc
(lambda (arg)
(when (file-directory-p (concat arg "/include"))
(setenv "NIX_CFLAGS_COMPILE_${suffixSalt}" (concat (getenv "NIX_CFLAGS_COMPILE_${suffixSalt}") " -isystem " arg "/include"))))
'(${concatStringsSep " " (map (pkg: "\"${pkg}\"") pkgs)}))
'';
# Expose expand-response-params we are /actually/ using. In stdenv
# bootstrapping, expand-response-params usually comes from an earlier stage,
# so it is important to expose this for reference checking.
inherit expand-response-params;
inherit nixSupport;
inherit defaultHardeningFlags;
};
dontBuild = true;
dontConfigure = true;
enableParallelBuilding = true;
unpackPhase = ''
src=$PWD
'';
wrapper = ./cc-wrapper.sh;
installPhase =
''
mkdir -p $out/bin $out/nix-support
wrap() {
local dst="$1"
local wrapper="$2"
export prog="$3"
export use_response_file_by_default=${if isClang && !isCcache then "1" else "0"}
substituteAll "$wrapper" "$out/bin/$dst"
chmod +x "$out/bin/$dst"
}
''
+ (if nativeTools then ''
echo ${if targetPlatform.isDarwin then cc else nativePrefix} > $out/nix-support/orig-cc
ccPath="${if targetPlatform.isDarwin then cc else nativePrefix}/bin"
'' else ''
echo $cc > $out/nix-support/orig-cc
ccPath="${cc}/bin"
'')
# Create symlinks to everything in the bintools wrapper.
+ ''
for bbin in $bintools/bin/*; do
mkdir -p "$out/bin"
ln -s "$bbin" "$out/bin/$(basename $bbin)"
done
''
# We export environment variables pointing to the wrapped nonstandard
# cmds, lest some lousy configure script use those to guess compiler
# version.
+ ''
export named_cc=${targetPrefix}cc
export named_cxx=${targetPrefix}c++
if [ -e $ccPath/${targetPrefix}gcc ]; then
wrap ${targetPrefix}gcc $wrapper $ccPath/${targetPrefix}gcc
ln -s ${targetPrefix}gcc $out/bin/${targetPrefix}cc
export named_cc=${targetPrefix}gcc
export named_cxx=${targetPrefix}g++
elif [ -e $ccPath/clang ]; then
wrap ${targetPrefix}clang $wrapper $ccPath/clang
ln -s ${targetPrefix}clang $out/bin/${targetPrefix}cc
export named_cc=${targetPrefix}clang
export named_cxx=${targetPrefix}clang++
elif [ -e $ccPath/arocc ]; then
wrap ${targetPrefix}arocc $wrapper $ccPath/arocc
ln -s ${targetPrefix}arocc $out/bin/${targetPrefix}cc
export named_cc=${targetPrefix}arocc
fi
if [ -e $ccPath/${targetPrefix}g++ ]; then
wrap ${targetPrefix}g++ $wrapper $ccPath/${targetPrefix}g++
ln -s ${targetPrefix}g++ $out/bin/${targetPrefix}c++
elif [ -e $ccPath/clang++ ]; then
wrap ${targetPrefix}clang++ $wrapper $ccPath/clang++
ln -s ${targetPrefix}clang++ $out/bin/${targetPrefix}c++
fi
if [ -e $ccPath/${targetPrefix}cpp ]; then
wrap ${targetPrefix}cpp $wrapper $ccPath/${targetPrefix}cpp
elif [ -e $ccPath/cpp ]; then
wrap ${targetPrefix}cpp $wrapper $ccPath/cpp
fi
''
# No need to wrap gnat, gnatkr, gnatname or gnatprep; we can just symlink them in
+ optionalString cc.langAda or false ''
for cmd in gnatbind gnatchop gnatclean gnatlink gnatls gnatmake; do
wrap ${targetPrefix}$cmd ${./gnat-wrapper.sh} $ccPath/${targetPrefix}$cmd
done
for cmd in gnat gnatkr gnatname gnatprep; do
ln -s $ccPath/${targetPrefix}$cmd $out/bin/${targetPrefix}$cmd
done
# this symlink points to the unwrapped gnat's output "out". It is used by
# our custom gprconfig compiler description to find GNAT's ada runtime. See
# ../../development/ada-modules/gprbuild/{boot.nix, nixpkgs-gnat.xml}
ln -sf ${cc} $out/nix-support/gprconfig-gnat-unwrapped
''
+ optionalString cc.langD or false ''
wrap ${targetPrefix}gdc $wrapper $ccPath/${targetPrefix}gdc
''
+ optionalString cc.langFortran or false ''
wrap ${targetPrefix}gfortran $wrapper $ccPath/${targetPrefix}gfortran
ln -sv ${targetPrefix}gfortran $out/bin/${targetPrefix}g77
ln -sv ${targetPrefix}gfortran $out/bin/${targetPrefix}f77
export named_fc=${targetPrefix}gfortran
''
+ optionalString cc.langJava or false ''
wrap ${targetPrefix}gcj $wrapper $ccPath/${targetPrefix}gcj
''
+ optionalString cc.langGo or false ''
wrap ${targetPrefix}gccgo $wrapper $ccPath/${targetPrefix}gccgo
wrap ${targetPrefix}go ${./go-wrapper.sh} $ccPath/${targetPrefix}go
'';
strictDeps = true;
propagatedBuildInputs = [ bintools ] ++ extraTools ++ optionals cc.langD or cc.langJava or false [ zlib ];
depsTargetTargetPropagated = optional (libcxx != null) libcxx ++ extraPackages;
setupHooks = [
../setup-hooks/role.bash
] ++ optional (cc.langC or true) ./setup-hook.sh
++ optional (cc.langFortran or false) ./fortran-hook.sh
++ optional (targetPlatform.isWindows) (stdenvNoCC.mkDerivation {
name = "win-dll-hook.sh";
dontUnpack = true;
installPhase = ''
echo addToSearchPath "LINK_DLL_FOLDERS" "${cc_solib}/lib" > $out
echo addToSearchPath "LINK_DLL_FOLDERS" "${cc_solib}/lib64" >> $out
echo addToSearchPath "LINK_DLL_FOLDERS" "${cc_solib}/lib32" >> $out
'';
});
postFixup =
# Ensure flags files exists, as some other programs cat them. (That these
# are considered an exposed interface is a bit dubious, but fine for now.)
''
touch "$out/nix-support/cc-cflags"
touch "$out/nix-support/cc-ldflags"
''
# Backwards compatibility for packages expecting this file, e.g. with
# `$NIX_CC/nix-support/dynamic-linker`.
#
# TODO(@Ericson2314): Remove this after stable release and force
# everyone to refer to bintools-wrapper directly.
+ optionalString (!isArocc) ''
if [[ -f "$bintools/nix-support/dynamic-linker" ]]; then
ln -s "$bintools/nix-support/dynamic-linker" "$out/nix-support"
fi
if [[ -f "$bintools/nix-support/dynamic-linker-m32" ]]; then
ln -s "$bintools/nix-support/dynamic-linker-m32" "$out/nix-support"
fi
''
##
## GCC libs for non-GCC support
##
+ optionalString (useGccForLibs && isClang) ''
echo "-B${gccForLibs}/lib/gcc/${targetPlatform.config}/${gccForLibs.version}" >> $out/nix-support/cc-cflags
''
+ optionalString (useGccForLibs && !isArocc) ''
echo "-L${gccForLibs}/lib/gcc/${targetPlatform.config}/${gccForLibs.version}" >> $out/nix-support/cc-ldflags
echo "-L${gccForLibs_solib}/lib" >> $out/nix-support/cc-ldflags
''
# TODO We would like to connect this to `useGccForLibs`, but we cannot yet
# because `libcxxStdenv` on linux still needs this. Maybe someday we'll
# always set `useLLVM` on Darwin, and maybe also break down `useLLVM` into
# fine-grained use flags (libgcc vs compiler-rt, ld.lld vs legacy, libc++
# vs libstdc++, etc.) since Darwin isn't `useLLVM` on all counts. (See
# https://clang.llvm.org/docs/Toolchain.html for all the axes one might
# break `useLLVM` into.)
+ optionalString (isClang
&& targetPlatform.isLinux
&& !(targetPlatform.useAndroidPrebuilt or false)
&& !(targetPlatform.useLLVM or false)
&& gccForLibs != null) (''
echo "--gcc-toolchain=${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" >> $out/nix-support/cc-ldflags
''
# this ensures that when clang passes -lgcc_s to lld (as it does
# when building e.g. firefox), lld is able to find libgcc_s.so
+ optionals (!isArocc) (concatMapStrings (libgcc: ''
echo "-L${libgcc}/lib" >> $out/nix-support/cc-ldflags
'') (toList (gccForLibs.libgcc or []))))
##
## General libc support
##
# The "-B${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"
'' + optionalString (!isArocc) ''
echo "-B${libc_lib}${libc.libdir or "/lib/"}" >> $out/nix-support/libc-crt1-cflags
'' + optionalString (!(cc.langD or false)) ''
echo "-${if isArocc then "I" else "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 ${getDev libcxx}/include/c++/v1" >> $out/nix-support/libcxx-cxxflags
echo "-stdlib=libc++" >> $out/nix-support/libcxx-ldflags
''
##
## Initial CFLAGS
##
# GCC shows ${cc_solib}/lib in `gcc -print-search-dirs', but not
# ${cc_solib}/lib64 (even though it does actually search there...)..
# This confuses libtool. So add it to the compiler tool search
# path explicitly.
+ optionalString (!nativeTools && !isArocc) ''
if [ -e "${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${cc_solib}/lib"
'' + optionalString (cc.langAda or false && !isArocc) ''
touch "$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} $info
'' + optionalString (cc.langD or cc.langJava or false && !isArocc) ''
echo "-B${zlib}${zlib.libdir or "/lib/"}" >> $out/nix-support/libc-cflags
''
##
## Hardening support
##
+ ''
export hardening_unsupported_flags="${concatStringsSep " " ccHardeningUnsupportedFlags}"
''
# For clang, this is handled in add-clang-cc-cflags-before.sh
+ lib.optionalString (!isClang && machineFlags != []) ''
printf "%s\n" ${lib.escapeShellArgs machineFlags} >> $out/nix-support/cc-cflags-before
''
# TODO: categorize these and figure out a better place for them
+ optionalString targetPlatform.isWindows ''
hardening_unsupported_flags+=" pic"
'' + optionalString targetPlatform.isMinGW ''
hardening_unsupported_flags+=" stackprotector fortify"
'' + optionalString targetPlatform.isAvr ''
hardening_unsupported_flags+=" stackprotector pic"
'' + optionalString (targetPlatform.libc == "newlib" || targetPlatform.libc == "newlib-nano") ''
hardening_unsupported_flags+=" stackprotector fortify pie pic"
'' + optionalString (targetPlatform.libc == "musl" && targetPlatform.isx86_32) ''
hardening_unsupported_flags+=" stackprotector"
'' + optionalString targetPlatform.isNetBSD ''
hardening_unsupported_flags+=" stackprotector fortify"
'' + optionalString cc.langAda or false ''
hardening_unsupported_flags+=" format stackprotector strictoverflow"
'' + optionalString cc.langD or false ''
hardening_unsupported_flags+=" format"
'' + optionalString cc.langFortran or false ''
hardening_unsupported_flags+=" format"
'' + optionalString targetPlatform.isWasm ''
hardening_unsupported_flags+=" stackprotector fortify pie pic"
'' + optionalString targetPlatform.isMicroBlaze ''
hardening_unsupported_flags+=" stackprotector"
''
+ optionalString (libc != null && targetPlatform.isAvr && !isArocc) ''
for isa in avr5 avr3 avr4 avr6 avr25 avr31 avr35 avr51 avrxmega2 avrxmega4 avrxmega5 avrxmega6 avrxmega7 tiny-stack; do
echo "-B${getLib libc}/avr/lib/$isa" >> $out/nix-support/libc-crt1-cflags
done
''
+ optionalString targetPlatform.isDarwin ''
echo "-arch ${targetPlatform.darwinArch}" >> $out/nix-support/cc-cflags
''
+ optionalString targetPlatform.isAndroid ''
echo "-D__ANDROID_API__=${targetPlatform.androidSdkVersion}" >> $out/nix-support/cc-cflags
''
# There are a few tools (to name one libstdcxx5) which do not work
# well with multi line flags, so make the flags single line again
+ ''
for flags in "$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} $out/nix-support/add-gnat-extra-flags.sh
''
##
## General Clang support
## Needs to go after ^ because the for loop eats \n and makes this file an invalid script
##
+ optionalString isClang ''
# Escape twice: once for this script, once for the one it gets substituted into.
export machineFlags=${escapeShellArg (escapeShellArgs machineFlags)}
export defaultTarget=${targetPlatform.config}
substituteAll ${./add-clang-cc-cflags-before.sh} $out/nix-support/add-local-cc-cflags-before.sh
''
##
## Extra custom steps
##
+ extraBuildCommands
+ concatStringsSep "; "
(mapAttrsToList
(name: value: "echo ${toString value} >> $out/nix-support/${name}")
nixSupport);
env = {
inherit isClang;
# for substitution in utils.bash
# TODO(@sternenseemann): invent something cleaner than passing in "" in case of absence
expandResponseParams = lib.optionalString (expand-response-params != "") (lib.getExe expand-response-params);
# TODO(@sternenseemann): rename env var via stdenv rebuild
shell = getBin runtimeShell + runtimeShell.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;
} // lib.optionalAttrs (apple-sdk != null && stdenvNoCC.targetPlatform.isDarwin) {
# Wrapped compilers should do something useful even when no SDK is provided at `DEVELOPER_DIR`.
fallback_sdk = apple-sdk.__spliced.buildTarget or apple-sdk;
};
meta =
let cc_ = optionalAttrs (cc != null) cc; in
(optionalAttrs (cc_ ? meta) (removeAttrs cc.meta ["priority"])) //
{ description = attrByPath ["meta" "description"] "System C compiler" cc_ + " (wrapper script)";
priority = 10;
mainProgram = if name != "" then name else "${targetPrefix}${ccName}";
};
}