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From: "benh at kernel dot crashing.org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug build/29394] New: Possible typo in sysdeps/aarch64/configure{.ac}
Date: Fri, 22 Jul 2022 04:10:42 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29394

            Bug ID: 29394
           Summary: Possible typo in sysdeps/aarch64/configure{.ac}
           Product: glibc
           Version: unspecified
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: benh at kernel dot crashing.org
                CC: carlos at redhat dot com
  Target Milestone: ---

So I'm not super familiar with those configure macros, but I noticed this in
configure.ac"

# Check if asm support armv8.2-a+sve
AC_CACHE_CHECK(for SVE support in assembler, libc_cv_asm_sve, [dnl
cat > conftest.s <<\EOF
        ptrue p0.b
EOF
if AC_TRY_COMMAND(${CC-cc} -c -march=3Darmv8.2-a+sve conftest.s
1>&AS_MESSAGE_LOG_FD); then
  libc_cv_aarch64_sve_asm=3Dyes
else
  libc_cv_aarch64_sve_asm=3Dno
fi
rm -f conftest*])
if test $libc_cv_aarch64_sve_asm =3D yes; then
  AC_DEFINE(HAVE_AARCH64_SVE_ASM)
fi

Note the use of "libc_cv_asm_sve" vs. "libc_cv_aarch64_sve_asm"

This doesn't match other tests in the same file and might explain why the
result isn't displayed properly when running configure...

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