Improved glibc to handle multilib in combination with the new multlib parse-config

base/glibc/glibc.conf

@@ -32,8 +32,35 @@ if atstage toolchain; then
 	fi
 else
 	var_append confopt " " "--with-headers=$root/usr/include"
+
+	if [ "${SDECFG_MULTILIB:-0}" = 1 ] ; then
+		# set the ABI for each buildloop
+		echo_status "Glibc Buildloop: $buildloop"
+		hook_add preconf 3 'multilib_abi_loop $buildloop'
+	else
+		abi="$SDECFG_ABI_DEFAULT"
+	fi
+
+	if [ $buildloop -lt $buildloops ]; then
+		# as long as we did not reached the last loop we have to chdir
+		# back to the top-level source directory before we enter the
+		# next loop.
+		hook_add postmake 9 'cd .. ; pwd'
+	fi
+
+	# set slibdir according to the ABI we build
+	hook_add preconf 4 'pkg_glibc_set_slibdir $abi'
 fi
 
+# function to set slibdir depending on the ABI given as argument
+pkg_glibc_set_slibdir() {
+	slibdir="lib$1"
+	echo_status "slibdir: $slibdir"
+}
+
+# use at least "-O" when build without optimisation for debugging ...
+var_insert GCC_WRAPPER_INSERT " " "-O"
+
 # glibc does not like -ffast-math
 var_insert GCC_WRAPPER_REMOVE " " "-ffast-math"
 
@@ -50,9 +77,10 @@ hook_add preconf 3 "pkg_glibc_preconf"
 # We have to use an 'objdir' directory for building glibc and make its
 # name unique by appending $arch_target to distinguish while building
 # a multilib capable glibc using buildloops.
-pkg_glibc_objdir() {
-	mkdir -p "objdir-$arch_target"
-	cd "objdir-$arch_target"
+
+pkg_glibc_objdir(){
+	mkdir -p "objdir-$abi"
+	cd "objdir-$abi"
 }
 hook_add preconf 9 "pkg_glibc_objdir"
 
@@ -253,8 +281,6 @@ if atstage toolchain; then
 	makeinstopt="-k cross-compiling=yes install-headers"
 fi
 
-[[ $libdir = *lib64 ]] && slibdir=lib64 || slibdir=lib
-
 hook_add prepatch 3 "glibc_prepatch"
 hook_add postmake 5 "glibc_postmake"