[OE-core] [PATCH RFC] gcc-runtime: Hacks for libgfortran with gcc-4.8

[Khem Raj]

On Sep 5, 2013, at 2:17 PM, Richard Purdie <richard.purdie at linuxfoundation.org> wrote:

> These are the hacks I needed to make libgfortran build. This is ugly, no
> argument from me. We could probably get better results if we patch
> configure and libtool to stop doing nasty things. I've probably taken
> this as far as I'd want to though, not being a particular fan of
> fortran...
> 
> Khem: Any thoughts on this?
> 
> Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
> ---
> diff --git a/meta/recipes-devtools/gcc/gcc-runtime.inc b/meta/recipes-devtools/gcc/gcc-runtime.inc
> index 2599760..395623f 100644
> --- a/meta/recipes-devtools/gcc/gcc-runtime.inc
> +++ b/meta/recipes-devtools/gcc/gcc-runtime.inc
> @@ -18,6 +18,9 @@ RUNTIMETARGET = "libssp libstdc++-v3 libgomp"
> # libmudflap
> # libgfortran
> 
> +DEPENDS_append = " chrpath-replacement-native"
> +EXTRANATIVEPATH += "chrpath-native"
> +
> do_configure () {
> 	export CXX="${CXX} -nostdinc++ -nostdlib++"
> 	mtarget=`echo ${MULTIMACH_TARGET_SYS} | sed -e s#-${SDKPKGSUFFIX}##`
> @@ -30,6 +33,11 @@ do_configure () {
> 		cd ${B}/$target/$d/
> 		chmod a+x ${S}/$d/configure
> 		${S}/$d/configure ${CONFIGUREOPTS} ${EXTRA_OECONF}
> +		# Ugly hack, libgfortran configure looks for ../libquadmath/libquadmath.la

Maybe we should explicitly --enable-libquadmath in gcc-cross when fortran is asked for in RUNTIMETARGETS
might avoid some of below.

> 
> +		# so we need to compile it before configure
> +		if [ "$d" = "libquadmath" ]; then
> +			oe_runmake MULTIBUILDTOP=${B}/$target/$d/
> +		fi
> 	done
> }
> 
> @@ -38,6 +46,16 @@ do_compile () {
> 	for d in libgcc ${RUNTIMETARGET}; do
> 		cd ${B}/$target/$d/
> 		oe_runmake MULTIBUILDTOP=${B}/$target/$d/
> +		if [ "$d" = "libgfortran" ]; then
> +			# libtool needs libdir to match the final installation directory which configure
> +			# sets from output from this command (e.g. both set to /usr/lib/../lib
> +			# It also adds bogus RPATHS which we have to delete
> +			fulllibdir=`$CC -print-multi-os-directory`
> +			if [ $fulllibdir != "." ]; then
> +				sed -i -e "s#relink_command=.*#relink_command=#" ${B}/$target/$d/libgfortran.la
> +				chrpath -d `readlink -f ${B}/$target/$d/.libs/libgfortran.so`
> +			fi
> +		fi

hmm remind me but I think we use unmodified libtool that comes with gcc IIRC. if we used libtool-cross then this could
be fixed there

> 	done
> }
> 
> 
> 
>