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

[Richard Purdie <richard.purdie@linuxfoundation.org>]

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@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} ${EXTRA_OECONF}
+		# Ugly hack, libgfortran configure looks for ../libquadmath/libquadmath.la 
+		# so we need to compile it before configure
+		if [ "$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
 	done
 }