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source $stdenv/setup
FIXINC_DUMMY=$NIX_BUILD_TOP/dummy
mkdir $FIXINC_DUMMY
preConfigure() {
if test "$noSysDirs" = "1"; then
# Disable the standard include directories.
cat >> ./gcc/cppdefault.h <<EOF
#undef LOCAL_INCLUDE_DIR
#undef SYSTEM_INCLUDE_DIR
#undef STANDARD_INCLUDE_DIR
EOF
fi
# 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"
}
preConfigure=preConfigure
postConfigure() {
if test "$noSysDirs" = "1"; then
# Patch some of the makefiles to force linking against our own
# 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 $NIX_GCC/nix-support/add-flags, since that
# would cause *this* GCC to be linked against the
# *previous* GCC. Need some more modularity there.
extraFlags="-Wl,-s -B$glibc/lib -isystem $glibc/include \
-L$glibc/lib -Wl,-dynamic-linker -Wl,$glibc/lib/ld-linux.so.2"
# Oh, what a hack. I should be shot for this.
# In stage 1, we should link against the previous GCC, but
# not afterwards. Otherwise we retain a dependency.
# However, ld-wrapper, which adds the linker flags for the
# previous GCC, is also used in stage 2/3. We can prevent
# it from adding them by NIX_GLIBC_FLAGS_SET, but then
# gcc-wrapper will also not add them, thereby causing
# stage 1 to fail. So we use a trick to only set the
# flags in gcc-wrapper.
hook=$(pwd)/ld-wrapper-hook
echo "NIX_GLIBC_FLAGS_SET=1" > $hook
export NIX_LD_WRAPPER_START_HOOK=$hook
fi
mf=Makefile
sed \
-e "s^FLAGS_FOR_TARGET =\(.*\)^FLAGS_FOR_TARGET = \1 $extraFlags^" \
< $mf > $mf.tmp
mv $mf.tmp $mf
mf=gcc/Makefile
sed \
-e "s^X_CFLAGS =\(.*\)^X_CFLAGS = \1 $extraFlags^" \
< $mf > $mf.tmp
mv $mf.tmp $mf
# Patch gcc/Makefile to prevent fixinc.sh from "fixing" system
# header files from /usr/include.
mf=gcc/Makefile
sed \
-e "s^NATIVE_SYSTEM_HEADER_DIR =\(.*\)^NATIVE_SYSTEM_HEADER_DIR = $FIXINC_DUMMY^" \
< $mf > $mf.tmp
mv $mf.tmp $mf
fi
}
postConfigure=postConfigure
makeFlags="bootstrap"
genericBuild
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