Re: [PATCH v3] LoongArch: Add LoongArch architecture detection to __float128 support in libgfortran and libquadmath [PR119408].

Mon, 07 Apr 2025 02:00:34 -0700 


在 2025/4/7 下午4:02, Jakub Jelinek 写道:

On Mon, Apr 07, 2025 at 03:44:52PM +0800, Lulu Cheng wrote:

In GCC14, LoongArch added __float128 as an alias for _Float128.
In commit r15-8962, support for q/Q suffixes for 128-bit floating point
numbers.  This will cause the compiler to automatically link libquadmath
when compiling Fortran programs.  But on LoongArch `long double` is
IEEE quad, so there is no need to implement libquadmath.
This causes link failure.

        PR target/119408

libgfortran/ChangeLog:

        * acinclude.m4: When checking for __float128 support, determine
        whether the current architecture is LoongArch.  If so, return false.
        * configure: Regenerate.

libquadmath/ChangeLog:

        * configure.ac: When checking for __float128 support, determine
        whether the current architecture is LoongArch.  If so, return false.
        * configure: Regenerate.

        Sigend-off-by: Xi Ruoyao <xry...@xry111.site>
        Sigend-off-by: Jakub Jelinek <ja...@redhat.com>

---
v1 -> v2:
        Corrected typos in commit information.
v2 -> v3:
        Regenerate libgfortran/configure using gnu autoconf2.69.

LGTM.

        Jakub

Thanks for your review.























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