From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1791) id DF6AF3875DD6; Thu, 28 Sep 2023 17:50:26 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org DF6AF3875DD6 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1695923426; bh=6GCTvkWeq7iEa1MiiIOtGj6XL1G6rAo2q4LE74za/aU=; h=From:To:Subject:Date:From; b=dLGM4nuDtOPzcpSlnPSgOIFvHLZJt4fbvnIIVpxY6t7kRuz/c3DHi8RPenZAos4n4 N9rGqr5PUUY31Aa6HmEJ/eHYEVgKAND+H02PZmgBVScAvaMmFfKQqD7/mbejhL7qaL By0Sb4w9A3ZdQB0A9RBBL4S4+nuNVOXlD6VybAg0= Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Adhemerval Zanella To: glibc-cvs@sourceware.org Subject: [glibc/azanella/clang] configure: Fix check for -fno-tree-loop-distribute-patterns X-Act-Checkin: glibc X-Git-Author: Fangrui Song X-Git-Refname: refs/heads/azanella/clang X-Git-Oldrev: 6248c3674e9acbc33afed2a65d4916cbb9873a77 X-Git-Newrev: ffcaa3c6710fbaec084b8c66e3f480ef50aaf311 Message-Id: <20230928175026.DF6AF3875DD6@sourceware.org> Date: Thu, 28 Sep 2023 17:50:26 +0000 (GMT) List-Id: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=ffcaa3c6710fbaec084b8c66e3f480ef50aaf311 commit ffcaa3c6710fbaec084b8c66e3f480ef50aaf311 Author: Fangrui Song Date: Sun Sep 26 00:15:23 2021 -0700 configure: Fix check for -fno-tree-loop-distribute-patterns clang does not support -fno-tree-loop-distribute-patterns and using on __attribute__ ((__optimize__ (...))) only triggers a warning with AC_TRY_COMMAND. Add -Werror so the tests fails if compiler does not support it. Diff: --- configure | 2 +- configure.ac | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/configure b/configure index 45ee893d49..85226db392 100755 --- a/configure +++ b/configure @@ -7402,7 +7402,7 @@ __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns"))) foo (void) {} EOF libc_cv_cc_loop_to_function=no -if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c' +if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -Werror -c conftest.c' { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5 (eval $ac_try) 2>&5 ac_status=$? diff --git a/configure.ac b/configure.ac index 7a7fe4a28a..f508411c25 100644 --- a/configure.ac +++ b/configure.ac @@ -1504,7 +1504,7 @@ __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns"))) foo (void) {} EOF libc_cv_cc_loop_to_function=no -if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c]) +if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -Werror -c conftest.c]) then libc_cv_cc_loop_to_function=yes fi