* [PATCH] LoongArch: Allow using --with-arch=native if host CPU is LoongArch
@ 2023-07-20 13:28 Xi Ruoyao
2023-07-22 9:11 ` chenglulu
0 siblings, 1 reply; 2+ messages in thread
From: Xi Ruoyao @ 2023-07-20 13:28 UTC (permalink / raw)
To: gcc-patches; +Cc: Lulu Cheng, WANG Xuerui, Xi Ruoyao
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?
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 ${host} in
+ loongarch*) ;; # OK
+ *)
echo "--with-arch=native is illegal for cross-compiler." 1>&2
exit 1
- fi
+ ;;
+ esac
;;
"")
echo "Please set a default value for \${with_arch}" \
--
2.41.0
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] LoongArch: Allow using --with-arch=native if host CPU is LoongArch
2023-07-20 13:28 [PATCH] LoongArch: Allow using --with-arch=native if host CPU is LoongArch Xi Ruoyao
@ 2023-07-22 9:11 ` chenglulu
0 siblings, 0 replies; 2+ messages in thread
From: chenglulu @ 2023-07-22 9:11 UTC (permalink / raw)
To: Xi Ruoyao, gcc-patches
在 2023/7/20 下午9:28, Xi Ruoyao 写道:
> If the host triple and the target triple are different but the host is
> LoongArch, in some cases --with-arch=native can be useful. For example,
> if we are bootstrapping a loongarch64-linux-musl toolchain on a
> Glibc-based system and we don't intend to use the toolchain on other
> machines, we can use
>
> ../gcc/configure --{build,host}=loongarch64-linux-gnu \
> --target=loongarch64-linux-musl --with-arch=native
>
> Relax the check in config.gcc to allow such configurations.
>
> gcc/ChangeLog:
>
> * config.gcc [target=loongarch*-*-*, with_arch=native]: Allow
> building cross compiler if the host CPU is LoongArch.
> ---
>
> Tested on x86_64-linux-gnu (building a cross compiler targeting
> LoongArch --with-arch=native still rejected) and loongarch64-linux-gnu
> (building a cross compiler targeting loongarch64-linux-musl allowed).
> Ok for trunk?
Hi, Ruoyao:
I'm sorry that some things at home are late, can this usage scenario
be described in detail? I didn't really understand that.
>
> gcc/config.gcc | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/gcc/config.gcc b/gcc/config.gcc
> index 1446eb2b3ca..146bca22a38 100644
> --- a/gcc/config.gcc
> +++ b/gcc/config.gcc
> @@ -4939,10 +4939,13 @@ case "${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}" \
^ permalink raw reply [flat|nested] 2+ messages in thread
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