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377 lines
15 KiB
Nix
377 lines
15 KiB
Nix
{
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lib,
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stdenv,
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enableMultilib,
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targetConfig,
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}:
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let
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forceLibgccToBuildCrtStuff = import ./libgcc-buildstuff.nix { inherit lib stdenv; };
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isCross = !lib.systems.equals stdenv.targetPlatform stdenv.hostPlatform;
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in
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# We don't support multilib and cross at the same time
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assert !(enableMultilib && isCross);
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originalAttrs:
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(stdenv.mkDerivation (
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finalAttrs:
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originalAttrs
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// {
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passthru = (originalAttrs.passthru or { }) // {
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inherit forceLibgccToBuildCrtStuff;
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};
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preUnpack = ''
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oldOpts="$(shopt -po nounset)" || true
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set -euo pipefail
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export NIX_FIXINC_DUMMY="$NIX_BUILD_TOP/dummy"
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mkdir "$NIX_FIXINC_DUMMY"
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if test "$staticCompiler" = "1"; then
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EXTRA_LDFLAGS="-static"
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elif test "''${NIX_DONT_SET_RPATH-}" != "1"; then
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EXTRA_LDFLAGS="-Wl,-rpath,''${!outputLib}/lib"
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else
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EXTRA_LDFLAGS=""
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fi
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# GCC interprets empty paths as ".", which we don't want.
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if test -z "''${CPATH-}"; then unset CPATH; fi
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if test -z "''${LIBRARY_PATH-}"; then unset LIBRARY_PATH; fi
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echo "\$CPATH is \`''${CPATH-}'"
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echo "\$LIBRARY_PATH is \`''${LIBRARY_PATH-}'"
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if test "$noSysDirs" = "1"; then
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declare -g \
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EXTRA_FLAGS_FOR_BUILD EXTRA_FLAGS EXTRA_FLAGS_FOR_TARGET \
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EXTRA_LDFLAGS_FOR_BUILD EXTRA_LDFLAGS_FOR_TARGET
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# Extract flags from Bintools Wrappers
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for post in '_FOR_BUILD' ""; do
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curBintools="NIX_BINTOOLS''${post}"
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declare -a extraLDFlags=()
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if [[ -e "''${!curBintools}/nix-support/orig-libc" ]]; then
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# Figure out what extra flags when linking to pass to the gcc
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# compilers being generated to make sure that they use our libc.
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extraLDFlags=($(< "''${!curBintools}/nix-support/libc-ldflags") $(< "''${!curBintools}/nix-support/libc-ldflags-before" || true))
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if [ -e ''${!curBintools}/nix-support/ld-set-dynamic-linker ]; then
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extraLDFlags=-dynamic-linker=$(< ''${!curBintools}/nix-support/dynamic-linker)
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fi
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# The path to the Libc binaries such as `crti.o'.
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libc_libdir="$(< "''${!curBintools}/nix-support/orig-libc")/lib"
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else
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# Hack: support impure environments.
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extraLDFlags=("-L/usr/lib64" "-L/usr/lib")
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libc_libdir="/usr/lib"
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fi
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declare -a prefixExtraLDFlags=()
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prefixExtraLDFlags=("-L$libc_libdir")
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nixDontSetRpathVar=NIX_DONT_SET_RPATH''${post}
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if test "''${!nixDontSetRpathVar-}" != "1"; then
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prefixExtraLDFlags+=("-rpath" "$libc_libdir")
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fi
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extraLDFlags=("''${prefixExtraLDFlags[@]}" "''${extraLDFlags[@]}")
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for i in "''${extraLDFlags[@]}"; do
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declare -g EXTRA_LDFLAGS''${post}+=" -Wl,$i"
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done
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done
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# Extract flags from CC Wrappers
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for post in '_FOR_BUILD' ""; do
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curCC="NIX_CC''${post}"
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curFIXINC="NIX_FIXINC_DUMMY''${post}"
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declare -a extraFlags=()
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if [[ -e "''${!curCC}/nix-support/orig-libc" ]]; then
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# Figure out what extra compiling flags to pass to the gcc compilers
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# being generated to make sure that they use our libc.
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extraFlags=($(< "''${!curCC}/nix-support/libc-crt1-cflags") $(< "''${!curCC}/nix-support/libc-cflags"))
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# The path to the Libc headers
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libc_devdir="$(< "''${!curCC}/nix-support/orig-libc-dev")"
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# Use *real* header files, otherwise a limits.h is generated that
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# does not include Libc's limits.h (notably missing SSIZE_MAX,
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# which breaks the build).
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declare -g NIX_FIXINC_DUMMY''${post}="$libc_devdir/include"
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else
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# Hack: support impure environments.
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extraFlags=("-isystem" "/usr/include")
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declare -g NIX_FIXINC_DUMMY''${post}=/usr/include
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fi
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extraFlags=("-I''${!curFIXINC}" "''${extraFlags[@]}")
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# BOOT_CFLAGS defaults to `-g -O2'; since we override it below, make
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# sure to explictly add them so that files compiled with the bootstrap
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# compiler are optimized and (optionally) contain debugging information
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# (info "(gccinstall) Building").
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if test -n "''${dontStrip-}"; then
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extraFlags=("-O2" "-g" "''${extraFlags[@]}")
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else
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# Don't pass `-g' at all; this saves space while building.
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extraFlags=("-O2" "''${extraFlags[@]}")
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fi
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declare -g EXTRA_FLAGS''${post}="''${extraFlags[*]}"
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done
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if test -z "''${targetConfig-}"; then
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# host = target, so the flags are the same
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EXTRA_FLAGS_FOR_TARGET="$EXTRA_FLAGS"
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EXTRA_LDFLAGS_FOR_TARGET="$EXTRA_LDFLAGS"
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fi
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# We include `-fmacro-prefix-map` in `cc-wrapper` for non‐GCC
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# platforms only, but they get picked up and passed down to
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# e.g. GFortran calls that complain about the option not
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# applying to the language. Hack around it by asking GCC not
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# to complain.
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#
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# TODO: Someone please fix this to do things that make sense.
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if [[ $EXTRA_FLAGS_FOR_BUILD == *-fmacro-prefix-map* ]]; then
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EXTRA_FLAGS_FOR_BUILD+=" -Wno-complain-wrong-lang"
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fi
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if [[ $EXTRA_FLAGS_FOR_TARGET == *-fmacro-prefix-map* ]]; then
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EXTRA_FLAGS_FOR_TARGET+=" -Wno-complain-wrong-lang"
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fi
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# CFLAGS_FOR_TARGET are needed for the libstdc++ configure script to find
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# the startfiles.
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# FLAGS_FOR_TARGET are needed for the target libraries to receive the -Bxxx
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# for the startfiles.
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makeFlagsArray+=(
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"BUILD_SYSTEM_HEADER_DIR=$NIX_FIXINC_DUMMY_FOR_BUILD"
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"SYSTEM_HEADER_DIR=$NIX_FIXINC_DUMMY_FOR_BUILD"
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"NATIVE_SYSTEM_HEADER_DIR=$NIX_FIXINC_DUMMY"
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"LDFLAGS_FOR_BUILD=$EXTRA_LDFLAGS_FOR_BUILD"
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#"LDFLAGS=$EXTRA_LDFLAGS"
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"LDFLAGS_FOR_TARGET=$EXTRA_LDFLAGS_FOR_TARGET"
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"CFLAGS_FOR_BUILD=$EXTRA_FLAGS_FOR_BUILD $EXTRA_LDFLAGS_FOR_BUILD"
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"CXXFLAGS_FOR_BUILD=$EXTRA_FLAGS_FOR_BUILD $EXTRA_LDFLAGS_FOR_BUILD"
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"FLAGS_FOR_BUILD=$EXTRA_FLAGS_FOR_BUILD $EXTRA_LDFLAGS_FOR_BUILD"
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# It seems there is a bug in GCC 5
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#"CFLAGS=$EXTRA_FLAGS $EXTRA_LDFLAGS"
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#"CXXFLAGS=$EXTRA_FLAGS $EXTRA_LDFLAGS"
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"CFLAGS_FOR_TARGET=$EXTRA_FLAGS_FOR_TARGET $EXTRA_LDFLAGS_FOR_TARGET"
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"CXXFLAGS_FOR_TARGET=$EXTRA_FLAGS_FOR_TARGET $EXTRA_LDFLAGS_FOR_TARGET"
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"FLAGS_FOR_TARGET=$EXTRA_FLAGS_FOR_TARGET $EXTRA_LDFLAGS_FOR_TARGET"
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)
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if test -z "''${targetConfig-}"; then
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makeFlagsArray+=(
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"BOOT_CFLAGS=$EXTRA_FLAGS $EXTRA_LDFLAGS"
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"BOOT_LDFLAGS=$EXTRA_FLAGS_FOR_TARGET $EXTRA_LDFLAGS_FOR_TARGET"
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)
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fi
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if test "$withoutTargetLibc" == 1; then
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# We don't want the gcc build to assume there will be a libc providing
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# limits.h in this stage
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makeFlagsArray+=(
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'LIMITS_H_TEST=false'
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)
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else
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makeFlagsArray+=(
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'LIMITS_H_TEST=true'
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)
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fi
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fi
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eval "$oldOpts"
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'';
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preConfigure = (originalAttrs.preConfigure or "") + ''
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if test -n "$newlibSrc"; then
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tar xvf "$newlibSrc" -C ..
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ln -s ../newlib-*/newlib newlib
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# Patch to get armvt5el working:
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sed -i -e 's/ arm)/ arm*)/' newlib/configure.host
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fi
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# Bug - they packaged zlib
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if test -d "zlib"; then
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# This breaks the build without-headers, which should build only
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# the target libgcc as target libraries.
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# See 'configure:5370'
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rm -Rf zlib
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fi
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if test -n "$crossMingw" -a -n "$withoutTargetLibc"; then
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mkdir -p ../mingw
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# --with-build-sysroot expects that:
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cp -R $libcCross/include ../mingw
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appendToVar configureFlags "--with-build-sysroot=`pwd`/.."
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fi
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# Perform the build in a different directory.
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mkdir ../build
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cd ../build
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configureScript=../$sourceRoot/configure
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'';
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postConfigure = ''
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# Avoid store paths when embedding ./configure flags into gcc.
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# Mangled arguments are still useful when reporting bugs upstream.
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sed -e "/TOPLEVEL_CONFIGURE_ARGUMENTS=/ s|$NIX_STORE/[a-z0-9]\{32\}-|$NIX_STORE/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-|g" -i Makefile
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'';
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preInstall =
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# What follows is a horribly cursed hack.
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#
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# GCC will install its libraries to $out/lib, $out/lib32, $out/lib64,
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# $out/$targetConfig/lib, $out/$targetConfig/lib32 or $out/$targetConfig/lib64,
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# depending on whether it's built as native or cross, and the exact target spec.
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#
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# We can't predict what it's actually going to do, and we also can't just tell it
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# to always install to lib, but we want everything to end up in lib
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# for consistency (multilib weirdness aside).
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#
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# So, we create a bunch of symlinks before we run GCC's install phase,
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# redirecting every possible directory it may want to write to to the place
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# we actually want things to be installed.
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# We will then nuke the symlinks in postInstall.
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#
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# FIXME: there must be a better way to do this.
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''
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declare -ga compatibilitySymlinks=()
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makeCompatibilitySymlink() {
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declare -a outputsToLink=("$out")
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if [ -n "$lib" ]; then
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outputsToLink+=("$lib")
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fi
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for output in "''${outputsToLink[@]}"; do
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local linkTarget="$1"
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local linkName="$output/$2"
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echo "Creating compatibility symlink: $linkTarget -> $linkName"
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mkdir -p "$(dirname "$linkName")"
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ln -s "$linkTarget" "$linkName"
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compatibilitySymlinks+=("$linkName")
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done
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}
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''
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+
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# This will redirect $output/lib{32,64} to $output/lib.
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# Multilib is special, because it creates $out/lib (for 32-bit)
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# and $out/lib64 (for 64-bit). No other targets can have both.
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lib.optionalString (!enableMultilib) ''
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makeCompatibilitySymlink lib lib32
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makeCompatibilitySymlink lib lib64
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''
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+
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# This will redirect $output/$targetConfig/lib{,32,64} to $output/$targetConfig/lib.
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lib.optionalString isCross ''
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makeCompatibilitySymlink lib $targetConfig/lib32
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makeCompatibilitySymlink lib $targetConfig/lib64
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'';
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postInstall = ''
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# Clean up our compatibility symlinks (see above)
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for link in "''${compatibilitySymlinks[@]}"; do
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echo "Removing compatibility symlink: $link"
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rm -f "$link"
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done
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# Move target runtime libraries to lib output.
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# For non-cross, they're in $out/lib; for cross, they're in $out/$targetConfig/lib.
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targetLibDir="''${targetConfig+$targetConfig/}lib"
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moveToOutput "$targetLibDir/lib*.so*" "''${!outputLib}"
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moveToOutput "$targetLibDir/lib*.dylib" "''${!outputLib}"
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moveToOutput "$targetLibDir/lib*.dll.a" "''${!outputLib}"
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moveToOutput "$targetLibDir/lib*.dll" "''${!outputLib}"
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moveToOutput "share/gcc-*/python" "''${!outputLib}"
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if [ -z "$enableShared" ]; then
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moveToOutput "$targetLibDir/lib*.a" "''${!outputLib}"
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fi
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for i in "''${!outputLib}"/$targetLibDir/*.py; do
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substituteInPlace "$i" --replace "$out" "''${!outputLib}"
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done
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# Multilib and cross can't exist at the same time, so just use lib64 here
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if [ -n "$enableMultilib" ]; then
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moveToOutput "lib64/lib*.so*" "''${!outputLib}"
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moveToOutput "lib64/lib*.dylib" "''${!outputLib}"
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moveToOutput "lib64/lib*.dll.a" "''${!outputLib}"
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moveToOutput "lib64/lib*.dll" "''${!outputLib}"
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for i in "''${!outputLib}"/lib64/*.py; do
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substituteInPlace "$i" --replace "$out" "''${!outputLib}"
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done
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fi
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# Remove `fixincl' to prevent a retained dependency on the
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# previous gcc.
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rm -rf $out/libexec/gcc/*/*/install-tools
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rm -rf $out/lib/gcc/*/*/install-tools
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# More dependencies with the previous gcc or some libs (gccbug stores the build command line)
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rm -rf $out/bin/gccbug
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# Remove .la files, they're not adjusted for the makeCompatibilitySymlink magic,
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# which confuses libtool and leads to weird linking errors.
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# Removing the files just makes libtool link .so files directly, which is usually
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# what we want anyway.
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find $out -name '*.la' -delete
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if type "install_name_tool"; then
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for i in "''${!outputLib}"/lib/*.*.dylib "''${!outputLib}"/lib/*.so.[0-9]; do
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install_name_tool -id "$i" "$i" || true
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for old_path in $(otool -L "$i" | grep "$out" | awk '{print $1}'); do
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new_path=`echo "$old_path" | sed "s,$out,''${!outputLib},"`
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install_name_tool -change "$old_path" "$new_path" "$i" || true
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done
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done
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fi
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# Get rid of some "fixed" header files
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rm -rfv $out/lib/gcc/*/*/include-fixed/{root,linux,sys/mount.h,bits/statx.h,pthread.h}
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# Replace hard links for i686-pc-linux-gnu-gcc etc. with symlinks.
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for i in $out/bin/*-gcc*; do
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if cmp -s $out/bin/gcc $i; then
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ln -sfn gcc $i
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fi
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done
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for i in $out/bin/c++ $out/bin/*-c++* $out/bin/*-g++*; do
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if cmp -s $out/bin/g++ $i; then
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ln -sfn g++ $i
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fi
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done
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# Two identical man pages are shipped (moving and compressing is done later)
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for i in "$out"/share/man/man1/*g++.1; do
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if test -e "$i"; then
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man_prefix=`echo "$i" | sed "s,.*/\(.*\)g++.1,\1,"`
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ln -sf "$man_prefix"gcc.1 "$i"
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fi
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done
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''
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# if cross-compiling, link from $lib/lib to $lib/${targetConfig}.
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# since native-compiles have $lib/lib as a directory (not a
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# symlink), this ensures that in every case we can assume that
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# $lib/lib contains the .so files
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+ lib.optionalString isCross ''
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if [ -e "$lib/$targetConfig/lib" ]; then
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ln -s "$lib/$targetConfig/lib" "$lib/lib"
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fi
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'';
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}
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))
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