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source $stdenv/setup
FIXINC_DUMMY=$NIX_BUILD_TOP/dummy
mkdir $FIXINC_DUMMY
# libstdc++ needs this; otherwise it will use /lib/cpp, which is a Bad
# Thing.
export CPP="gcc -E"
preConfigure() {
if test "$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 "$langFortran"; then
langs="$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 $NIX_GCC/nix-support/orig-libc; then
# Figure out what extra flags to pass to the gcc compilers
# being generated to make sure that they use our glibc.
extraFlags="$(cat $NIX_GCC/nix-support/libc-cflags)"
for i in $(cat $NIX_GCC/nix-support/libc-ldflags) $(cat $NIX_GCC/nix-support/libc-ldflags-before); do
extraFlags="$extraFlags -Wl,$i"
done
# Use *real* header files, otherwise a limits.h is generated
# that does not include Glibc's limits.h (notably missing
# SSIZE_MAX, which breaks the build).
export FIXINC_DUMMY=$(cat $NIX_GCC/nix-support/orig-libc)/include
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
buildFlags="bootstrap"
genericBuild
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