source $stdenv/setup export NIX_FIXINC_DUMMY=$NIX_BUILD_TOP/dummy mkdir $NIX_FIXINC_DUMMY # libstdc++ needs this; otherwise it will use /lib/cpp, which is a Bad # Thing. export CPP="gcc -E" if test "$noSysDirs" = "1"; then # Figure out what extra flags to pass to the gcc compilers being # generated to make sure that they use our glibc. if test -e $NIX_GCC/nix-support/orig-glibc; then glibc=$(cat $NIX_GCC/nix-support/orig-glibc) # Ugh. Copied from gcc-wrapper/builder.sh. We can't just # source in $NIX_GCC/nix-support/add-flags, since that would # cause *this* GCC to be linked against the *previous* GCC. # Need some more modularity there. extraCFlags="-B$glibc/lib -isystem $glibc/include" extraLDFlags="-B$glibc/lib -L$glibc/lib -Wl,-s \ -Wl,-dynamic-linker,$glibc/lib/ld-linux.so.2" # Oh, what a hack. I should be shot for this. In stage 1, we # should link against the previous GCC, but not afterwards. # Otherwise we retain a dependency. However, ld-wrapper, # which adds the linker flags for the previous GCC, is also # used in stage 2/3. We can prevent it from adding them by # NIX_GLIBC_FLAGS_SET, but then gcc-wrapper will also not add # them, thereby causing stage 1 to fail. So we use a trick to # only set the flags in gcc-wrapper. hook=$(pwd)/ld-wrapper-hook echo "NIX_GLIBC_FLAGS_SET=1" > $hook export NIX_LD_WRAPPER_START_HOOK=$hook # Use *real* header files, otherwise a limits.h is generated # that does not include Glibc's limits.h (notably missing # SSIZE_MAX, which breaks the build). export NIX_FIXINC_DUMMY=$glibc/include fi export NIX_EXTRA_CFLAGS=$extraCFlags export NIX_EXTRA_LDFLAGS=$extraLDFlags export CFLAGS=$extraCFlags export CXXFLAGS=$extraCFlags export LDFLAGS=$extraLDFlags fi preConfigure=preConfigure preConfigure() { # Determine the frontends to build. langs="c" if test -n "$langCC"; then langs="$langs,c++" fi if test -n "$langF77"; then langs="$langs,f95" fi # Perform the build in a different directory. mkdir ../build cd ../build configureScript=../$sourceRoot/configure configureFlags="--enable-languages=$langs --disable-libstdcxx-pch" } postInstall=postInstall postInstall() { # Remove precompiled headers for now. They are very big and # probably not very useful yet. find $out/include -name "*.gch" -exec rm -rf {} \; -prune # Remove `fixincl' to prevent a retained dependency on the # previous gcc. rm -rf $out/libexec/gcc/*/*/install-tools } genericBuild