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From: Adhemerval Zanella <>
Subject: [glibc/azanella/clang] configure: Fix check for -fno-tree-loop-distribute-patterns
Date: Tue,  2 Apr 2024 15:51:54 +0000 (GMT)	[thread overview]
Message-ID: <> (raw);h=c241a205b60a2cb2fb3b00ce7bdeb44fa9ceb218

commit c241a205b60a2cb2fb3b00ce7bdeb44fa9ceb218
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.

 configure    | 2 +- | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index c18fb48ba5..85136296bf 100755
--- a/configure
+++ b/configure
@@ -7280,7 +7280,7 @@ __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns")))
 foo (void) {}
-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 $ac_try) 2>&5
diff --git a/ b/
index 55e131f9dd..1260c2189d 100644
--- a/
+++ b/
@@ -1442,7 +1442,7 @@ __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns")))
 foo (void) {}
-if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c])
+if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -Werror -c conftest.c])

             reply	other threads:[~2024-04-02 15:51 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-04-02 15:51 Adhemerval Zanella [this message]
  -- strict thread matches above, loose matches on Subject: below --
2024-04-17 20:05 Adhemerval Zanella
2024-02-09 17:30 Adhemerval Zanella
2024-02-07 14:05 Adhemerval Zanella
2024-01-29 17:55 Adhemerval Zanella
2023-12-21 18:52 Adhemerval Zanella
2023-09-28 17:50 Adhemerval Zanella

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