nixpkgs/pkgs/development/compilers/gcc/builder.sh
Jörg Thalheim 96092dc936
stdenv: make -nostdinc work as intended
Right now we add glibc to search path also -nostdinc was provided,
which breaks projects providing their own gcc.
2020-07-23 08:39:46 +01:00

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source $stdenv/setup
oldOpts="$(shopt -po nounset)" || true
set -euo pipefail
export NIX_FIXINC_DUMMY="$NIX_BUILD_TOP/dummy"
mkdir "$NIX_FIXINC_DUMMY"
if test "$staticCompiler" = "1"; then
EXTRA_LDFLAGS="-static"
else
EXTRA_LDFLAGS="-Wl,-rpath,${!outputLib}/lib"
fi
# GCC interprets empty paths as ".", which we don't want.
if test -z "${CPATH-}"; then unset CPATH; fi
if test -z "${LIBRARY_PATH-}"; then unset LIBRARY_PATH; fi
echo "\$CPATH is \`${CPATH-}'"
echo "\$LIBRARY_PATH is \`${LIBRARY_PATH-}'"
if test "$noSysDirs" = "1"; then
declare \
EXTRA_FLAGS_FOR_BUILD EXTRA_FLAGS EXTRA_FLAGS_FOR_TARGET \
EXTRA_LDFLAGS_FOR_BUILD EXTRA_LDFLAGS_FOR_TARGET
# Extract flags from Bintools Wrappers
for post in '_FOR_BUILD' ''; do
curBintools="NIX_BINTOOLS${post}"
declare -a extraLDFlags=()
if [[ -e "${!curBintools}/nix-support/orig-libc" ]]; then
# Figure out what extra flags when linking to pass to the gcc
# compilers being generated to make sure that they use our libc.
extraLDFlags=($(< "${!curBintools}/nix-support/libc-ldflags") $(< "${!curBintools}/nix-support/libc-ldflags-before" || true))
# The path to the Libc binaries such as `crti.o'.
libc_libdir="$(< "${!curBintools}/nix-support/orig-libc")/lib"
else
# Hack: support impure environments.
extraLDFlags=("-L/usr/lib64" "-L/usr/lib")
libc_libdir="/usr/lib"
fi
extraLDFlags=("-L$libc_libdir" "-rpath" "$libc_libdir"
"${extraLDFlags[@]}")
for i in "${extraLDFlags[@]}"; do
declare EXTRA_LDFLAGS${post}+=" -Wl,$i"
done
done
# Extract flags from CC Wrappers
for post in '_FOR_BUILD' ''; do
curCC="NIX_CC${post}"
curFIXINC="NIX_FIXINC_DUMMY${post}"
declare -a extraFlags=()
if [[ -e "${!curCC}/nix-support/orig-libc" ]]; then
# Figure out what extra compiling flags to pass to the gcc compilers
# being generated to make sure that they use our libc.
extraFlags=($(< "${!curCC}/nix-support/libc-crt1-cflags") $(< "${!curCC}/nix-support/libc-cflags"))
# The path to the Libc headers
libc_devdir="$(< "${!curCC}/nix-support/orig-libc-dev")"
# Use *real* header files, otherwise a limits.h is generated that
# does not include Libc's limits.h (notably missing SSIZE_MAX,
# which breaks the build).
declare NIX_FIXINC_DUMMY${post}="$libc_devdir/include"
else
# Hack: support impure environments.
extraFlags=("-isystem" "/usr/include")
declare NIX_FIXINC_DUMMY${post}=/usr/include
fi
extraFlags=("-I${!curFIXINC}" "${extraFlags[@]}")
# BOOT_CFLAGS defaults to `-g -O2'; since we override it below, make
# sure to explictly add them so that files compiled with the bootstrap
# compiler are optimized and (optionally) contain debugging information
# (info "(gccinstall) Building").
if test -n "${dontStrip-}"; then
extraFlags=("-O2" "-g" "${extraFlags[@]}")
else
# Don't pass `-g' at all; this saves space while building.
extraFlags=("-O2" "${extraFlags[@]}")
fi
declare EXTRA_FLAGS${post}="${extraFlags[*]}"
done
if test -z "${targetConfig-}"; then
# host = target, so the flags are the same
EXTRA_FLAGS_FOR_TARGET="$EXTRA_FLAGS"
EXTRA_LDFLAGS_FOR_TARGET="$EXTRA_LDFLAGS"
fi
# CFLAGS_FOR_TARGET are needed for the libstdc++ configure script to find
# the startfiles.
# FLAGS_FOR_TARGET are needed for the target libraries to receive the -Bxxx
# for the startfiles.
makeFlagsArray+=(
"BUILD_SYSTEM_HEADER_DIR=$NIX_FIXINC_DUMMY_FOR_BUILD"
"SYSTEM_HEADER_DIR=$NIX_FIXINC_DUMMY_FOR_BUILD"
"NATIVE_SYSTEM_HEADER_DIR=$NIX_FIXINC_DUMMY"
"LDFLAGS_FOR_BUILD=$EXTRA_LDFLAGS_FOR_BUILD"
#"LDFLAGS=$EXTRA_LDFLAGS"
"LDFLAGS_FOR_TARGET=$EXTRA_LDFLAGS_FOR_TARGET"
"CFLAGS_FOR_BUILD=$EXTRA_FLAGS_FOR_BUILD $EXTRA_LDFLAGS_FOR_BUILD"
"CXXFLAGS_FOR_BUILD=$EXTRA_FLAGS_FOR_BUILD $EXTRA_LDFLAGS_FOR_BUILD"
"FLAGS_FOR_BUILD=$EXTRA_FLAGS_FOR_BUILD $EXTRA_LDFLAGS_FOR_BUILD"
# It seems there is a bug in GCC 5
#"CFLAGS=$EXTRA_FLAGS $EXTRA_LDFLAGS"
#"CXXFLAGS=$EXTRA_FLAGS $EXTRA_LDFLAGS"
"CFLAGS_FOR_TARGET=$EXTRA_FLAGS_FOR_TARGET $EXTRA_LDFLAGS_FOR_TARGET"
"CXXFLAGS_FOR_TARGET=$EXTRA_FLAGS_FOR_TARGET $EXTRA_LDFLAGS_FOR_TARGET"
"FLAGS_FOR_TARGET=$EXTRA_FLAGS_FOR_TARGET $EXTRA_LDFLAGS_FOR_TARGET"
)
if test -z "${targetConfig-}"; then
makeFlagsArray+=(
"BOOT_CFLAGS=$EXTRA_FLAGS $EXTRA_LDFLAGS"
"BOOT_LDFLAGS=$EXTRA_FLAGS_FOR_TARGET $EXTRA_LDFLAGS_FOR_TARGET"
)
fi
if test "$crossStageStatic" == 1; then
# We don't want the gcc build to assume there will be a libc providing
# limits.h in this stage
makeFlagsArray+=(
'LIMITS_H_TEST=false'
)
else
makeFlagsArray+=(
'LIMITS_H_TEST=true'
)
fi
fi
if test -n "${targetConfig-}"; then
# The host strip will destroy some important details of the objects
dontStrip=1
fi
eval "$oldOpts"
providedPreConfigure="$preConfigure";
preConfigure() {
if test -n "$newlibSrc"; then
tar xvf "$newlibSrc" -C ..
ln -s ../newlib-*/newlib newlib
# Patch to get armvt5el working:
sed -i -e 's/ arm)/ arm*)/' newlib/configure.host
fi
# Bug - they packaged zlib
if test -d "zlib"; then
# This breaks the build without-headers, which should build only
# the target libgcc as target libraries.
# See 'configure:5370'
rm -Rf zlib
fi
if test -f "$NIX_CC/nix-support/orig-libc"; then
# Patch the configure script so it finds glibc headers. It's
# important for example in order not to get libssp built,
# because its functionality is in glibc already.
sed -i \
-e "s,glibc_header_dir=/usr/include,glibc_header_dir=$libc_dev/include", \
gcc/configure
fi
if test -n "$crossMingw" -a -n "$crossStageStatic"; then
mkdir -p ../mingw
# --with-build-sysroot expects that:
cp -R $libcCross/include ../mingw
configureFlags="$configureFlags --with-build-sysroot=`pwd`/.."
fi
# Eval the preConfigure script from nix expression.
eval "$providedPreConfigure"
# Perform the build in a different directory.
mkdir ../build
cd ../build
configureScript=../$sourceRoot/configure
}
postConfigure() {
# Don't store the configure flags in the resulting executables.
sed -e '/TOPLEVEL_CONFIGURE_ARGUMENTS=/d' -i Makefile
}
preInstall() {
mkdir -p "$out/${targetConfig}/lib"
mkdir -p "${!outputLib}/${targetConfig}/lib"
# Make lib64 symlinks to lib.
if [ -n "$is64bit" -a -z "$enableMultilib" ]; then
ln -s lib "$out/${targetConfig}/lib64"
ln -s lib "${!outputLib}/${targetConfig}/lib64"
fi
}
postInstall() {
# Move runtime libraries to lib output.
moveToOutput "${targetConfig+$targetConfig/}lib/lib*.so*" "${!outputLib}"
moveToOutput "${targetConfig+$targetConfig/}lib/lib*.la" "${!outputLib}"
moveToOutput "${targetConfig+$targetConfig/}lib/lib*.dylib" "${!outputLib}"
moveToOutput "${targetConfig+$targetConfig/}lib/lib*.dll.a" "${!outputLib}"
moveToOutput "share/gcc-*/python" "${!outputLib}"
for i in "${!outputLib}/${targetConfig}"/lib/*.{la,py}; do
substituteInPlace "$i" --replace "$out" "${!outputLib}"
done
if [ -n "$enableMultilib" ]; then
moveToOutput "${targetConfig+$targetConfig/}lib64/lib*.so*" "${!outputLib}"
moveToOutput "${targetConfig+$targetConfig/}lib64/lib*.la" "${!outputLib}"
moveToOutput "${targetConfig+$targetConfig/}lib64/lib*.dylib" "${!outputLib}"
for i in "${!outputLib}/${targetConfig}"/lib64/*.{la,py}; do
substituteInPlace "$i" --replace "$out" "${!outputLib}"
done
fi
# Remove `fixincl' to prevent a retained dependency on the
# previous gcc.
rm -rf $out/libexec/gcc/*/*/install-tools
rm -rf $out/lib/gcc/*/*/install-tools
# More dependencies with the previous gcc or some libs (gccbug stores the build command line)
rm -rf $out/bin/gccbug
if type "patchelf"; then
# Take out the bootstrap-tools from the rpath, as it's not needed at all having $out
for i in $(find "$out"/libexec/gcc/*/*/* -type f -a \! -name '*.la'); do
PREV_RPATH=`patchelf --print-rpath "$i"`
NEW_RPATH=`echo "$PREV_RPATH" | sed 's,:[^:]*bootstrap-tools/lib,,g'`
patchelf --set-rpath "$NEW_RPATH" "$i" && echo OK
done
fi
if type "install_name_tool"; then
for i in "${!outputLib}"/lib/*.*.dylib; do
install_name_tool -id "$i" "$i" || true
for old_path in $(otool -L "$i" | grep "$out" | awk '{print $1}'); do
new_path=`echo "$old_path" | sed "s,$out,${!outputLib},"`
install_name_tool -change "$old_path" "$new_path" "$i" || true
done
done
fi
# Get rid of some "fixed" header files
rm -rfv $out/lib/gcc/*/*/include-fixed/{root,linux}
# Replace hard links for i686-pc-linux-gnu-gcc etc. with symlinks.
for i in $out/bin/*-gcc*; do
if cmp -s $out/bin/gcc $i; then
ln -sfn gcc $i
fi
done
for i in $out/bin/c++ $out/bin/*-c++* $out/bin/*-g++*; do
if cmp -s $out/bin/g++ $i; then
ln -sfn g++ $i
fi
done
# Two identical man pages are shipped (moving and compressing is done later)
ln -sf gcc.1 "$out"/share/man/man1/g++.1
}
genericBuild