94 lines
2.7 KiB
Bash
94 lines
2.7 KiB
Bash
source $stdenv/setup
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FIXINC_DUMMY=$NIX_BUILD_TOP/dummy
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mkdir $FIXINC_DUMMY
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preConfigure() {
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if test "$noSysDirs" = "1"; then
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# Disable the standard include directories.
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cat >> ./gcc/cppdefault.h <<EOF
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#undef LOCAL_INCLUDE_DIR
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#undef SYSTEM_INCLUDE_DIR
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#undef STANDARD_INCLUDE_DIR
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EOF
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fi
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# Determine the frontends to build.
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langs="c"
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if test -n "$langCC"; then
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langs="$langs,c++"
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fi
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if test -n "$langF77"; then
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langs="$langs,f77"
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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=../$sourceRoot/configure
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configureFlags="--enable-languages=$langs"
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}
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preConfigure=preConfigure
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postConfigure() {
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if test "$noSysDirs" = "1"; then
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# Patch some of the makefiles to force linking against our own
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# glibc.
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if test -e $NIX_GCC/nix-support/orig-glibc; then
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glibc=$(cat $NIX_GCC/nix-support/orig-glibc)
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# Ugh. Copied from gcc-wrapper/builder.sh. We can't just
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# source in $NIX_GCC/nix-support/add-flags, since that
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# would cause *this* GCC to be linked against the
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# *previous* GCC. Need some more modularity there.
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extraFlags="-Wl,-s -B$glibc/lib -isystem $glibc/include \
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-L$glibc/lib -Wl,-dynamic-linker -Wl,$glibc/lib/ld-linux.so.2"
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# Oh, what a hack. I should be shot for this.
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# In stage 1, we should link against the previous GCC, but
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# not afterwards. Otherwise we retain a dependency.
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# However, ld-wrapper, which adds the linker flags for the
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# previous GCC, is also used in stage 2/3. We can prevent
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# it from adding them by NIX_GLIBC_FLAGS_SET, but then
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# gcc-wrapper will also not add them, thereby causing
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# stage 1 to fail. So we use a trick to only set the
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# flags in gcc-wrapper.
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hook=$(pwd)/ld-wrapper-hook
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echo "NIX_GLIBC_FLAGS_SET=1" > $hook
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export NIX_LD_WRAPPER_START_HOOK=$hook
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fi
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mf=Makefile
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sed \
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-e "s^FLAGS_FOR_TARGET =\(.*\)^FLAGS_FOR_TARGET = \1 $extraFlags^" \
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< $mf > $mf.tmp
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mv $mf.tmp $mf
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mf=gcc/Makefile
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sed \
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-e "s^X_CFLAGS =\(.*\)^X_CFLAGS = \1 $extraFlags^" \
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< $mf > $mf.tmp
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mv $mf.tmp $mf
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# Patch gcc/Makefile to prevent fixinc.sh from "fixing" system
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# header files from /usr/include.
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mf=gcc/Makefile
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sed \
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-e "s^NATIVE_SYSTEM_HEADER_DIR =\(.*\)^NATIVE_SYSTEM_HEADER_DIR = $FIXINC_DUMMY^" \
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< $mf > $mf.tmp
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mv $mf.tmp $mf
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fi
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}
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postConfigure=postConfigure
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makeFlags="bootstrap"
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genericBuild
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