141 lines
4.6 KiB
Nix
141 lines
4.6 KiB
Nix
{ lib, stdenvNoLibs, buildPackages
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, gcc, glibc
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, libiberty
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}:
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let
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stdenv = stdenvNoLibs;
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gccConfigureFlags = gcc.cc.configureFlags ++ [
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"--disable-fixincludes"
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"--disable-intl"
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"--enable-threads=posix"
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"--with-glibc-version=${glibc.version}"
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"--disable-plugin"
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# these are required in order to prevent inhibit_libc=true,
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# which will cripple libgcc's unwinder; see:
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# https://github.com/NixOS/nixpkgs/issues/213453#issuecomment-1616346163
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"--with-headers=${lib.getDev glibc}/include"
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"--with-native-system-header-dir=${lib.getDev glibc}${glibc.incdir or "/include"}"
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"--with-build-sysroot=/"
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];
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in stdenv.mkDerivation (finalAttrs: {
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pname = "libgcc";
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inherit (gcc.cc) src version;
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outputs = [ "out" "dev" ];
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strictDeps = true;
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depsBuildBuild = [ buildPackages.stdenv.cc ];
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nativeBuildInputs = [ libiberty ];
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buildInputs = [ glibc ];
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postUnpack = ''
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mkdir -p ./build
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buildRoot=$(readlink -e "./build")
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'';
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postPatch =
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gcc.cc.passthru.forceLibgccToBuildCrtStuff
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+ ''
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sourceRoot=$(readlink -e "./libgcc")
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'';
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hardeningDisable = [ "pie" ];
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preConfigure =
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''
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# Drop in libiberty, as external builds are not expected
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cd "$buildRoot"
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(
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mkdir -p build-${stdenv.buildPlatform.config}/libiberty/
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cd build-${stdenv.buildPlatform.config}/libiberty/
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ln -s ${buildPackages.libiberty}/lib/libiberty.a ./
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)
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mkdir -p "$buildRoot/gcc"
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cd "$buildRoot/gcc"
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(
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# We "shift" the tools over to fake platforms perspective from the previous stage.
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export AS_FOR_BUILD=${buildPackages.stdenv.cc}/bin/$AS_FOR_BUILD
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export CC_FOR_BUILD=${buildPackages.stdenv.cc}/bin/$CC_FOR_BUILD
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export CPP_FOR_BUILD=${buildPackages.stdenv.cc}/bin/$CPP_FOR_BUILD
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export CXX_FOR_BUILD=${buildPackages.stdenv.cc}/bin/$CXX_FOR_BUILD
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export LD_FOR_BUILD=${buildPackages.stdenv.cc.bintools}/bin/$LD_FOR_BUILD
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export AS=$AS_FOR_BUILD
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export CC=$CC_FOR_BUILD
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export CPP=$CPP_FOR_BUILD
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export CXX=$CXX_FOR_BUILD
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export LD=$LD_FOR_BUILD
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export AS_FOR_TARGET=${stdenv.cc}/bin/$AS
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export CC_FOR_TARGET=${stdenv.cc}/bin/$CC
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export CPP_FOR_TARGET=${stdenv.cc}/bin/$CPP
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export LD_FOR_TARGET=${stdenv.cc.bintools}/bin/$LD
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# We define GENERATOR_FILE so nothing bothers looking for GNU GMP.
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export NIX_CFLAGS_COMPILE_FOR_BUILD+=' -DGENERATOR_FILE=1'
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"$sourceRoot/../gcc/configure" ${lib.concatStringsSep " " gccConfigureFlags}
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# We remove the `libgcc.mvar` deps so that the bootstrap xgcc isn't built.
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sed -e 's,libgcc.mvars:.*$,libgcc.mvars:,' -i Makefile
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make \
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config.h \
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libgcc.mvars \
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tconfig.h \
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tm.h \
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options.h \
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insn-constants.h \
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'' + lib.optionalString stdenv.targetPlatform.isM68k ''
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sysroot-suffix.h \
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'' + lib.optionalString stdenv.targetPlatform.isAarch32 ''
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arm-isa.h \
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arm-cpu.h \
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'' + ''
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insn-modes.h
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)
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mkdir -p "$buildRoot/gcc/include"
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# Preparing to configure + build libgcc itself
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mkdir -p "$buildRoot/gcc/${stdenv.hostPlatform.config}/libgcc"
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cd "$buildRoot/gcc/${stdenv.hostPlatform.config}/libgcc"
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configureScript=$sourceRoot/configure
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chmod +x "$configureScript"
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export AS_FOR_BUILD=${buildPackages.stdenv.cc}/bin/$AS_FOR_BUILD
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export CC_FOR_BUILD=${buildPackages.stdenv.cc}/bin/$CC_FOR_BUILD
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export CPP_FOR_BUILD=${buildPackages.stdenv.cc}/bin/$CPP_FOR_BUILD
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export CXX_FOR_BUILD=${buildPackages.stdenv.cc}/bin/$CXX_FOR_BUILD
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export LD_FOR_BUILD=${buildPackages.stdenv.cc.bintools}/bin/$LD_FOR_BUILD
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export AS=${stdenv.cc}/bin/$AS
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export CC=${stdenv.cc}/bin/$CC
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export CPP=${stdenv.cc}/bin/$CPP
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export CXX=${stdenv.cc}/bin/$CXX
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export LD=${stdenv.cc.bintools}/bin/$LD
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export AS_FOR_TARGET=${stdenv.cc}/bin/$AS_FOR_TARGET
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export CC_FOR_TARGET=${stdenv.cc}/bin/$CC_FOR_TARGET
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export CPP_FOR_TARGET=${stdenv.cc}/bin/$CPP_FOR_TARGET
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export LD_FOR_TARGET=${stdenv.cc.bintools}/bin/$LD_FOR_TARGET
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'';
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configurePlatforms = [ "build" "host" ];
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configureFlags = [
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"cross_compiling=true"
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"--disable-gcov"
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"--with-glibc-version=${glibc.version}"
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];
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makeFlags = [ "MULTIBUILDTOP:=../" ];
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postInstall = ''
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moveToOutput "lib/gcc/${stdenv.hostPlatform.config}/${finalAttrs.version}/include" "$dev"
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mkdir -p "$out/lib" "$dev/include"
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ln -s "$out/lib/gcc/${stdenv.hostPlatform.config}/${finalAttrs.version}"/* "$out/lib"
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ln -s "$dev/lib/gcc/${stdenv.hostPlatform.config}/${finalAttrs.version}/include"/* "$dev/include/"
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'';
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})
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