在 2023/7/20 下午9:28, Xi Ruoyao 写道:
If the host triple and the target triple are different but the host is
LoongArch, in some cases --with-arch=native can be useful. For example,
if we are bootstrapping a loongarch64-linux-musl toolchain on a
Glibc-based system and we don't intend to use the toolchain on other
machines, we can use
../gcc/configure --{build,host}=loongarch64-linux-gnu \
--target=loongarch64-linux-musl --with-arch=native
Relax the check in config.gcc to allow such configurations.
gcc/ChangeLog:
* config.gcc [target=loongarch*-*-*, with_arch=native]: Allow
building cross compiler if the host CPU is LoongArch.
---
Tested on x86_64-linux-gnu (building a cross compiler targeting
LoongArch --with-arch=native still rejected) and loongarch64-linux-gnu
(building a cross compiler targeting loongarch64-linux-musl allowed).
Ok for trunk?
Hi, Ruoyao:
I'm sorry that some things at home are late, can this usage scenario
be described in detail? I didn't really understand that.
gcc/config.gcc | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/gcc/config.gcc b/gcc/config.gcc
index 1446eb2b3ca..146bca22a38 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -4939,10 +4939,13 @@ case "${target}" in
case ${with_arch} in
"" | loongarch64 | la464) ;; # OK, append here.
native)
- if test x${host} != x${target}; then
+ case ${host} in
+ loongarch*) ;; # OK
+ *)
echo "--with-arch=native is illegal for
cross-compiler." 1>&2
exit 1
- fi
+ ;;
+ esac
;;
"")
echo "Please set a default value for \${with_arch}" \
