# This is the top level configure for the gcc source tree which actually does
# _global_ configuration and records some specific options you want to pass to
# the configuration stage of the actual gcc and related pieces of software,
# namely to know exactly how the real packages are configured, it is done in
# the top makefile. As of today, you cannot modularize the different
# sub-packages cleanly, coze depending on their configuration, they will use
# some stuff _inside_ the other packages. THIS IS *INSANE BAD DESIGN FOR THE
# CORE OF A GNU/LINUX SYSTEM* since in the middle of all that, *YOU NEED* an
# external component: the glibc!! Proper design: break gcc in ACTUAL modules,
# to make the glibc just one of them, God Damn It!
# native-system-header-dir is relative to sysroot (for a cross compiler)
opts_common="\
	--enable-serial-configure							\
	--disable-bootstrap								\
	--target=$x86_target_gnu_triple							\
	--enable-threads=posix								\
	--disable-decimal-float								\
	--disable-fixed-point								\
	--disable-plugin								\
	--disable-multilib								\
	--disable-multiarch								\
	--disable-vtable-verify								\
	--disable-libquadmath								\
	--disable-libquadmath-support							\
	--disable-libada								\
	--disable-libgomp								\
	--disable-libatomic								\
	--disable-libcilkrts								\
	--disable-libitm								\
	--disable-libsanitizer								\
	--disable-libmpx								\
	--disable-libhsail-rt								\
	--disable-libstdcxx-pch								\
	--disable-lto									\
	--disable-nls									\
	--disable-libssp								\
	--disable-default-ssp								\
	--enable-link-mutex
"

# don't let sysroot empty
# The prefix *MUST* be the same than the binutils one or gcc won't find them at
# runtime.
build_opts_common="\
	--with-sysroot=/
"

cross_static_target_libgcc_gcc_c_configure()
{
export 'CC=gcc -B/nyan/glibc/current/lib -L/nyan/glibc/current/lib -Wl,-rpath-link,/nyan/glibc/current/lib -static-libgcc'
export 'CXX=g++ -B/nyan/glibc/current/lib -L/nyan/glibc/current/lib -Wl,-rpath-link,/nyan/glibc/current/lib -static-libgcc -static-libstdc++'
export 'CFLAGS=-O2 -pipe -fPIC'
export "CFLAGS_FOR_TARGET=-fPIC -O2 -pipe"
$src_dir/configure									\
	--prefix=$x86_cross_toolchain_dir_root/static-libgcc				\
	--with-build-time-tools=$x86_cross_toolchain_dir_root/static-libgcc		\
	--with-native-system-header-dir=$x86_prefix/devel/include-glibc-static-libgcc	\
	--enable-languages=c								\
	--disable-shared								\
	$build_opts_common								\
	$opts_common
unset CFLAGS_FOR_TARGET
unset CFLAGS
unset CXX
unset CC
}

cross_gcc_compilers_configure()
{
export 'CC=gcc -B/nyan/glibc/current/lib -L/nyan/glibc/current/lib -Wl,-rpath-link,/nyan/glibc/current/lib -static-libgcc'
export 'CXX=g++ -B/nyan/glibc/current/lib -L/nyan/glibc/current/lib -Wl,-rpath-link,/nyan/glibc/current/lib -static-libgcc -static-libstdc++'
export 'CFLAGS=-O2 -pipe -fPIC'
export 'CXXFLAGS=-O2 -pipe -fPIC'
# from there, we must fix the compiler path for targets, becoze
# our stuff is not in /lib... but in $x86_prefix/lib to make shared libs
export "CFLAGS_FOR_TARGET=-O2 -pipe -fPIC -B$x86_prefix/lib -L$x86_prefix/lib"
export "CXXFLAGS_FOR_TARGET=-O2 -pipe -fPIC -B$x86_prefix/lib -L$x86_prefix/lib"
# slibdir does not work for libstdc++, but only libgcc_s location is important
# because the glibc must find it:
# REMEMBER, THE SHARED LIBGCC_S IS MANDATORY FOR GLIBC PTHREAD_CANCEL (and should not...)
$src_dir/configure								\
	--prefix=$x86_cross_toolchain_dir_root					\
	--with-build-time-tools=$x86_cross_toolchain_dir_root			\
	--with-native-system-header-dir=$x86_prefix/devel/include-glibc-linux	\
	--enable-languages=c,c++						\
	--with-slibdir=$x86_prefix/lib						\
	$build_opts_common							\
	$opts_common
unset CXXFLAGS_FOR_TARGET
unset CFLAGS_FOR_TARGET
unset CXXFLAGS
unset CFLAGS
unset CXX
unset CC
}