mirror of
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.
252 lines
8.6 KiB
Bash
252 lines
8.6 KiB
Bash
source $stdenv/setup
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export NIX_FIXINC_DUMMY=$NIX_BUILD_TOP/dummy
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mkdir $NIX_FIXINC_DUMMY
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if test "$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 $extraLDFlags"
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# BOOT_CFLAGS defaults to `-g -O2'; since we override it below,
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# make sure to explictly add them so that files compiled with the
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# bootstrap compiler are optimized and (optionally) contain
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# debugging information (info "(gccinstall) Building").
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if test -n "$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 $extraFlags"
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fi
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EXTRA_FLAGS="$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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if test -f "$NIX_CC/nix-support/orig-libc"; then
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# Patch the configure script so it finds glibc headers. It's
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# important for example in order not to get libssp built,
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# because its functionality is in glibc already.
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glibc_headers="$(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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fi
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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=../$sourceRoot/configure
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}
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postConfigure() {
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# Don't store the configure flags in the resulting executables.
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sed -e '/TOPLEVEL_CONFIGURE_ARGUMENTS=/d' -i Makefile
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}
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preInstall() {
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# Make ‘lib64’ a symlink to ‘lib’.
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if [ -n "$is64bit" -a -z "$enableMultilib" ]; then
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mkdir -p $out/lib
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ln -s lib $out/lib64
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fi
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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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if PREV_RPATH=`patchelf --print-rpath $i`; then
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patchelf --set-rpath `echo $PREV_RPATH | sed 's,:[^:]*bootstrap-tools/lib,,'` $i
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fi
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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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# Disable RANDMMAP on grsec, which causes segfaults when using
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# precompiled headers.
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# See https://bugs.gentoo.org/show_bug.cgi?id=301299#c31
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paxmark r $out/libexec/gcc/*/*/{cc1,cc1plus}
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eval "$postInstallGhdl"
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}
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genericBuild
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