152 lines
4.5 KiB
Nix
152 lines
4.5 KiB
Nix
{ stdenvNoLibs, buildPackages, buildPlatform, hostPlatform
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, gcc, glibc
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, libiberty
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}:
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stdenvNoLibs.mkDerivation rec {
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name = "libgcc-${version}";
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inherit (gcc.cc) src version;
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outputs = [ "out" "dev" ];
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strictDeps = true;
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depsBuildBuild = [ buildPackages.stdenv.cc ];
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nativeBuildInputs = [ libiberty ];
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postUnpack = ''
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mkdir -p ./build
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buildRoot=$(readlink -e "./build")
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'';
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postPatch = ''
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sourceRoot=$(readlink -e "./libgcc")
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'';
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preConfigure = ''
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cd "$buildRoot"
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''
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# Drop in libiberty, as external builds are not expected
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+ ''
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(
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mkdir -p build-${buildPlatform.config}/libiberty/
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cd build-${buildPlatform.config}/libiberty/
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ln -s ${buildPackages.libiberty}/lib/libiberty.a ./
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)
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''
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# A few misc bits of gcc need to be built.
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#
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# - We "shift" the tools over to fake platforms perspective from the previous
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# stage.
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#
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# - We define GENERATOR_FILE so nothing bothers looking for GNU GMP.
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#
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# - We remove the `libgcc.mvar` deps so that the bootstrap xgcc isn't built.
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+ ''
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mkdir -p "$buildRoot/gcc"
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cd "$buildRoot/gcc"
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(
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export AS_FOR_BUILD=${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=${stdenvNoLibs.cc}/bin/$AS
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export CC_FOR_TARGET=${stdenvNoLibs.cc}/bin/$CC
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export CPP_FOR_TARGET=${stdenvNoLibs.cc}/bin/$CPP
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export LD_FOR_TARGET=${stdenvNoLibs.cc.bintools}/bin/$LD
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export NIX_BUILD_CFLAGS_COMPILE+=' -DGENERATOR_FILE=1'
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"$sourceRoot/../gcc/configure" $gccConfigureFlags
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sed -e 's,libgcc.mvars:.*$,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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insn-modes.h \
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gcov-iov.h
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)
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mkdir -p "$buildRoot/gcc/include"
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''
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# Preparing to configure + build libgcc itself
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+ ''
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mkdir -p "$buildRoot/gcc/${hostPlatform.config}/libgcc"
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cd "$buildRoot/gcc/${hostPlatform.config}/libgcc"
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configureScript=$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/$LD_FOR_BUILD
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export AS=${stdenvNoLibs.cc}/bin/$AS
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export CC=${stdenvNoLibs.cc}/bin/$CC
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export CPP=${stdenvNoLibs.cc}/bin/$CPP
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export CXX=${stdenvNoLibs.cc}/bin/$CXX
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export LD=${stdenvNoLibs.cc.bintools}/bin/$LD
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export AS_FOR_TARGET=${stdenvNoLibs.cc}/bin/$AS_FOR_TARGET
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export CC_FOR_TARGET=${stdenvNoLibs.cc}/bin/$CC_FOR_TARGET
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export CPP_FOR_TARGET=${stdenvNoLibs.cc}/bin/$CPP_FOR_TARGET
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export LD_FOR_TARGET=${stdenvNoLibs.cc.bintools}/bin/$LD_FOR_TARGET
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'';
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gccConfigureFlags = [
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"--build=${buildPlatform.config}"
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"--host=${buildPlatform.config}"
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"--target=${hostPlatform.config}"
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"--disable-bootstrap"
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"--disable-multilib" "--with-multilib-list="
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"--enable-languages=c"
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"--disable-fixincludes"
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"--disable-intl"
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"--disable-lto"
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"--disable-libatomic"
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"--disable-libbacktrace"
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"--disable-libcpp"
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"--disable-libssp"
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"--disable-libquadmath"
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"--disable-libgomp"
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"--disable-libvtv"
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"--disable-vtable-verify"
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"--with-system-zlib"
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] ++ stdenvNoLibs.lib.optional (hostPlatform.libc == "glibc")
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"--with-glibc-version=${glibc.version}";
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configurePlatforms = [ "build" "host" ];
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configureFlags = [
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"--disable-dependency-tracking"
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# $CC cannot link binaries, let alone run then
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"cross_compiling=true"
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# Do not have dynamic linker without libc
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"--enable-static"
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"--disable-shared"
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];
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makeFlags = [ "MULTIBUILDTOP:=../" ];
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postInstall = ''
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moveToOutput "lib/gcc/${hostPlatform.config}/${version}/include" "$dev"
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mkdir -p "$out/lib" "$dev/include"
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ln -s "$out/lib/gcc/${hostPlatform.config}/${version}"/* "$out/lib"
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ln -s "$dev/lib/gcc/${hostPlatform.config}/${version}/include"/* "$dev/include/"
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'';
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}
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