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source $stdenv/setup
export NIX_FIXINC_DUMMY=$NIX_BUILD_TOP/dummy
mkdir $NIX_FIXINC_DUMMY
if test "$noSysDirs" = "1"; then
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
fi
export NIX_EXTRA_CFLAGS=$extraCFlags
export NIX_EXTRA_LDFLAGS=$extraLDFlags
export CFLAGS=$extraCFlags
export CXXFLAGS=$extraCFlags
export LDFLAGS=$extraLDFlags
export BOOT_LDFLAGS=$extraLDFlags
fi
else
patches=""
fi
preConfigure() {
# Determine the frontends to build.
langs="c"
if test -n "$langCC"; then
langs="$langs,c++"
fi
if test -n "$langF77"; then
langs="$langs,f77"
fi
# Perform the build in a different directory.
mkdir ../build
cd ../build
configureScript=../$sourceRoot/configure
configureFlags="--enable-languages=$langs"
}
buildFlags="bootstrap"
genericBuild
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