From: Richard Purdie <richard.purdie@linuxfoundation.org>
Date: Wed, 14 May 2025 14:29:16 +0000 (+0100)
Subject: gcc: Fix riscv multilib issues in plain toolchains
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3081f62c18fcee642ab43efa717c8f71d51ae587;p=thirdparty%2Fopenembedded%2Fopenembedded-core-contrib.git

gcc: Fix riscv multilib issues in plain toolchains

RISC-V multilib currently doesn't work at all. We could disable multilib for
the riscv platform but that would then behave differently to all our others.
Instead, copy the non-multilib config over the multilib config for now for
riscv, meaning we can keep the platforms similar.

This isn't quite enough as the triplet specific c++ headers are in the wrong
place leading to compiler issues and testimage failures. Work around that too
until someone adds full multilib support for the platform (if desired).

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---

diff --git a/meta/recipes-devtools/gcc/gcc-multilib-config.inc b/meta/recipes-devtools/gcc/gcc-multilib-config.inc
index 2dbbc23c94..d9959364c3 100644
--- a/meta/recipes-devtools/gcc/gcc-multilib-config.inc
+++ b/meta/recipes-devtools/gcc/gcc-multilib-config.inc
@@ -34,6 +34,7 @@ python gcc_multilib_setup() {
                 '%s/aarch64/aarch64-linux.h' % src_conf_dir,
                 '%s/aarch64/aarch64-cores.def' % src_conf_dir,
                 '%s/arm/linux-eabi.h' % src_conf_dir,
+                '%s/riscv/t-linux*' % src_conf_dir,
                 '%s/*/linux.h' % src_conf_dir,
                 '%s/linux.h' % src_conf_dir)
 
@@ -45,6 +46,9 @@ python gcc_multilib_setup() {
             bb.utils.mkdirhier('%s/%s' % (build_conf_dir, parent_dir))
             bb.utils.copyfile(fn, '%s/%s' % (build_conf_dir, rel_path))
 
+    # For now, force the riscv multilib view to our own meaning we can always enable multilib
+    bb.utils.copyfile('%s/riscv/t-linux' % src_conf_dir, '%s/riscv/t-linux-multilib' % build_conf_dir)
+
     pn = d.getVar('PN')
     multilibs = (d.getVar('MULTILIB_VARIANTS') or '').split()
     if not multilibs and pn != "nativesdk-gcc":
@@ -145,6 +149,7 @@ python gcc_multilib_setup() {
         'i686'      : ['gcc/config/i386/t-linux64'],
         'mips'      : ['gcc/config/mips/t-linux64'],
         'mips64'    : ['gcc/config/mips/t-linux64'],
+        'riscv64'     : ['gcc/config/riscv/t-linux-multilib'],
         'powerpc'   : ['gcc/config/rs6000/t-linux64'],
         'powerpc64' : ['gcc/config/rs6000/t-linux64'],
         'aarch64'   : ['gcc/config/aarch64/t-aarch64'],
@@ -161,6 +166,7 @@ python gcc_multilib_setup() {
         'powerpc64' : ['gcc/config/linux.h', 'gcc/config/rs6000/linux64.h'],
         'aarch64'   : ['gcc/config/linux.h', 'gcc/config/aarch64/aarch64-linux.h', 'gcc/config/arm/linux-eabi.h'],
         'arm'       : ['gcc/config/linux.h', 'gcc/config/aarch64/aarch64-linux.h', 'gcc/config/arm/linux-eabi.h'],
+        'riscv64'     : ['gcc/config/linux.h'],
     }
 
     libdir32 = 'SYSTEMLIBS_DIR'
diff --git a/meta/recipes-devtools/gcc/gcc-runtime.inc b/meta/recipes-devtools/gcc/gcc-runtime.inc
index afcc13a310..fe1f43b2fd 100644
--- a/meta/recipes-devtools/gcc/gcc-runtime.inc
+++ b/meta/recipes-devtools/gcc/gcc-runtime.inc
@@ -144,6 +144,11 @@ do_install:append:class-target () {
 		ln -sf ../${X86ARCH32}${TARGET_VENDOR}-${TARGET_OS} ${D}${includedir}/c++/${BINV}/${TARGET_ARCH}${TARGET_VENDOR}-${TARGET_OS}/32
 	fi
 
+	if [ "${TARGET_ARCH}" = "riscv64" -a "${MULTILIB_VARIANTS}" = "" ]; then
+		mv ${D}${includedir}/c++/${BINV}/${TARGET_SYS}/bits/* ${D}${includedir}/c++/${BINV}/bits
+		mv ${D}${includedir}/c++/${BINV}/${TARGET_SYS}/ext/* ${D}${includedir}/c++/${BINV}/ext
+	fi
+
 	if [ "${TCLIBC}" != "glibc" ]; then
 		case "${TARGET_OS}" in
 			"linux-musl" | "linux-*spe") extra_target_os="linux";;