crosstool-ng/packages/glibc/2.39/0001-aarch64-configure-Pass-mcpu-along-with-march-to-dete.patch
Chris Packham f0415c04e3 glibc: Add glibc 2.39
https://sourceware.org/pipermail/libc-announce/2024/000038.html

Add the new version and rebase the patches we're carrying.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
2024-03-01 14:46:12 +13:00

50 lines
1.9 KiB
Diff

From 68d57fd288c47c3cec7b94e2b4f863e6b216d69d Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Fri, 4 Aug 2023 09:34:50 -0700
Subject: [PATCH 2/2] aarch64/configure: Pass -mcpu along with -march to detect
sve support
SVE support logic in configure is rightly passing -march=<arch>+sve to
compiler to override whatever user might have passed via environment,
however GCC does not do as intended when -mcpu is part of environment
compiler flags, then it overrides the -march computed from -mcpu and
igonores other -march values so this test fails for lot of aarch64
machines which pass -mcpu that does not support sve. This is seemingly a
bug in GCC [1], until that is fixed we preempt -mcpu along with -march
in the configure test itself. It does not change functionality and yet
lets us through the GCC inconsistency.
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110901
Upstream-Status: Inappropriate [Workaround for a GCC issue]
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
sysdeps/aarch64/configure | 2 +-
sysdeps/aarch64/configure.ac | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
--- a/sysdeps/aarch64/configure
+++ b/sysdeps/aarch64/configure
@@ -327,7 +327,7 @@
cat > conftest.s <<\EOF
ptrue p0.b
EOF
-if { ac_try='${CC-cc} -c -march=armv8.2-a+sve conftest.s 1>&5'
+if { ac_try='${CC-cc} -c -mcpu=generic+sve -march=armv8.2-a+sve conftest.s 1>&5'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
--- a/sysdeps/aarch64/configure.ac
+++ b/sysdeps/aarch64/configure.ac
@@ -92,7 +92,7 @@
cat > conftest.s <<\EOF
ptrue p0.b
EOF
-if AC_TRY_COMMAND(${CC-cc} -c -march=armv8.2-a+sve conftest.s 1>&AS_MESSAGE_LOG_FD); then
+if AC_TRY_COMMAND(${CC-cc} -c -mcpu=generic+sve -march=armv8.2-a+sve conftest.s 1>&AS_MESSAGE_LOG_FD); then
libc_cv_aarch64_sve_asm=yes
else
libc_cv_aarch64_sve_asm=no