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https://github.com/NixOS/nixpkgs.git
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28b6fb61e6
This is done for the sake of Yosemite, which does not have gcc, and yet this change is also compatible with Linux.
237 lines
8 KiB
Bash
237 lines
8 KiB
Bash
source $stdenv/setup
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export NIX_FIXINC_DUMMY=$NIX_BUILD_TOP/dummy
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mkdir $NIX_FIXINC_DUMMY
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# libstdc++ needs this; otherwise it will use /lib/cpp, which is a Bad
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# Thing.
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export CPP="gcc -E"
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if test "$staticCompiler" = "1"; then
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EXTRA_LDFLAGS="-static"
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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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if test -e $NIX_CC/nix-support/orig-libc; then
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# Figure out what extra flags to pass to the gcc compilers
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# being generated to make sure that they use our glibc.
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extraFlags="$(cat $NIX_CC/nix-support/libc-cflags)"
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extraLDFlags="$(cat $NIX_CC/nix-support/libc-ldflags) $(cat $NIX_CC/nix-support/libc-ldflags-before)"
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# Use *real* header files, otherwise a limits.h is generated
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# that does not include Glibc's limits.h (notably missing
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# SSIZE_MAX, which breaks the build).
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export NIX_FIXINC_DUMMY=$(cat $NIX_CC/nix-support/orig-libc)/include
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# The path to the Glibc binaries such as `crti.o'.
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glibc_libdir="$(cat $NIX_CC/nix-support/orig-libc)/lib"
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else
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# Hack: support impure environments.
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extraFlags="-isystem /usr/include"
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extraLDFlags="-L/usr/lib64 -L/usr/lib"
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glibc_libdir="/usr/lib"
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export NIX_FIXINC_DUMMY=/usr/include
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fi
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extraFlags="-I$NIX_FIXINC_DUMMY $extraFlags"
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extraLDFlags="-L$glibc_libdir -rpath $glibc_libdir $extraLDFlags"
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EXTRA_FLAGS="$extraFlags"
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for i in $extraLDFlags; do
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EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,$i"
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done
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if test -n "$targetConfig"; then
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# Cross-compiling, we need gcc not to read ./specs in order to build
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# the g++ compiler (after the specs for the cross-gcc are created).
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# Having LIBRARY_PATH= makes gcc read the specs from ., and the build
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# breaks. Having this variable comes from the default.nix code to bring
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# gcj in.
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unset LIBRARY_PATH
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unset CPATH
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if test -z "$crossStageStatic"; then
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EXTRA_TARGET_CFLAGS="-B${libcCross}/lib -idirafter ${libcCross}/include"
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EXTRA_TARGET_LDFLAGS="-Wl,-L${libcCross}/lib"
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fi
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else
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if test -z "$NIX_CC_CROSS"; then
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EXTRA_TARGET_CFLAGS="$EXTRA_FLAGS"
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EXTRA_TARGET_LDFLAGS="$EXTRA_LDFLAGS"
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else
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# This the case of cross-building the gcc.
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# We need special flags for the target, different than those of the build
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# Assertion:
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test -e $NIX_CC_CROSS/nix-support/orig-libc
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# Figure out what extra flags to pass to the gcc compilers
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# being generated to make sure that they use our glibc.
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extraFlags="$(cat $NIX_CC_CROSS/nix-support/libc-cflags)"
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extraLDFlags="$(cat $NIX_CC_CROSS/nix-support/libc-ldflags) $(cat $NIX_CC_CROSS/nix-support/libc-ldflags-before)"
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# Use *real* header files, otherwise a limits.h is generated
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# that does not include Glibc's limits.h (notably missing
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# SSIZE_MAX, which breaks the build).
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NIX_FIXINC_DUMMY_CROSS=$(cat $NIX_CC_CROSS/nix-support/orig-libc)/include
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# The path to the Glibc binaries such as `crti.o'.
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glibc_libdir="$(cat $NIX_CC_CROSS/nix-support/orig-libc)/lib"
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extraFlags="-I$NIX_FIXINC_DUMMY_CROSS $extraFlags"
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extraLDFlags="-L$glibc_libdir -rpath $glibc_libdir $extraLDFlags"
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EXTRA_TARGET_CFLAGS="$extraFlags"
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for i in $extraLDFlags; do
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EXTRA_TARGET_LDFLAGS="$EXTRA_TARGET_LDFLAGS -Wl,$i"
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done
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fi
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fi
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# CFLAGS_FOR_TARGET are needed for the libstdc++ configure script to find
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# the startfiles.
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# FLAGS_FOR_TARGET are needed for the target libraries to receive the -Bxxx
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# for the startfiles.
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makeFlagsArray=( \
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"${makeFlagsArray[@]}" \
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NATIVE_SYSTEM_HEADER_DIR="$NIX_FIXINC_DUMMY" \
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SYSTEM_HEADER_DIR="$NIX_FIXINC_DUMMY" \
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CFLAGS_FOR_BUILD="$EXTRA_FLAGS $EXTRA_LDFLAGS" \
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CFLAGS_FOR_TARGET="$EXTRA_TARGET_CFLAGS $EXTRA_TARGET_LDFLAGS" \
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FLAGS_FOR_TARGET="$EXTRA_TARGET_CFLAGS $EXTRA_TARGET_LDFLAGS" \
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LDFLAGS_FOR_BUILD="$EXTRA_FLAGS $EXTRA_LDFLAGS" \
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LDFLAGS_FOR_TARGET="$EXTRA_TARGET_LDFLAGS $EXTRA_TARGET_LDFLAGS" \
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)
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if test -z "$targetConfig"; then
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makeFlagsArray=( \
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"${makeFlagsArray[@]}" \
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BOOT_CFLAGS="$EXTRA_FLAGS $EXTRA_LDFLAGS" \
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BOOT_LDFLAGS="$EXTRA_TARGET_CFLAGS $EXTRA_TARGET_LDFLAGS" \
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)
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fi
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if test -n "$targetConfig" -a "$crossStageStatic" == 1; then
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# We don't want the gcc build to assume there will be a libc providing
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# limits.h in this stagae
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makeFlagsArray=( \
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"${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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"${makeFlagsArray[@]}" \
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LIMITS_H_TEST=true \
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)
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fi
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fi
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if test -n "$targetConfig"; then
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# The host strip will destroy some important details of the objects
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dontStrip=1
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fi
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preConfigure() {
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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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# Patch the configure script so it finds glibc headers
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# It's important for example in order not to get libssp built, because it's
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# functionality is in glibc already.
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glibc_headers="$(cat $NIX_CC/nix-support/orig-libc)/include"
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sed -i \
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-e s,glibc_header_dir=/usr/include,glibc_header_dir=$glibc_headers, \
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gcc/configure
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if test -n "$crossMingw" -a -n "$crossStageStatic"; then
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mkdir -p ../mingw
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# --with-build-sysroot expects that:
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cp -R $libcCross/include ../mingw
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configureFlags="$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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# Don't store the configure flags in the resulting executables.
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sed -e '/TOPLEVEL_CONFIGURE_ARGUMENTS=/d' -i Makefile
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}
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postInstall() {
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# Remove precompiled headers for now. They are very big and
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# probably not very useful yet.
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find $out/include -name "*.gch" -exec rm -rf {} \; -prune
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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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# Take out the bootstrap-tools from the rpath, as it's not needed at all having $out
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for i in $out/libexec/gcc/*/*/*; do
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PREV_RPATH=`patchelf --print-rpath $i`
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patchelf --set-rpath `echo $PREV_RPATH | sed 's,:[^:]*bootstrap-tools/lib,,'` $i
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done
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# Get rid of some "fixed" header files
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rm -rf $out/lib/gcc/*/*/include/root
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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++ $i
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fi
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done
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eval "$postInstallGhdl"
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}
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if test -z "$targetConfig" && test -z "$crossConfig"; then
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if test -z "$profiledCompiler"; then
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buildFlags="bootstrap $buildFlags"
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else
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buildFlags="profiledbootstrap $buildFlags"
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fi
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fi
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genericBuild
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