Attachment 884999 Details for Bug 1082957 – Upstream patches ported to 5.18.2

[patch] Upstream patches ported to 5.18.2

perl-5.18.2-Pass-fwrapv-to-stricter-GCC-4.9.patch (text/plain), 1.76 KB, created by Petr Pisar on 2014-04-10 15:12:47 UTC

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Creator: Petr Pisar

Created: 2014-04-10 15:12:47 UTC

Size: 1.76 KB

patch

obsolete

>From a8d0bb2102bc09bfdc7e661fb159d9257474f168 Mon Sep 17 00:00:00 2001
>From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com>
>Date: Thu, 10 Apr 2014 16:16:31 +0200
>Subject: [PATCH] Pass -fwrapv to stricter GCC 4.9
>MIME-Version: 1.0
>Content-Type: text/plain; charset=UTF-8
>Content-Transfer-Encoding: 8bit
>
>This is port to 5.18.2 of the two upstream patches:
>
>commit 869747506fd0081f6c7eed149ec6f7adbcc4d5b1
>Author: H.Merijn Brand <h.m.brand@xs4all.nl>
>Date:   Wed Apr 9 11:16:55 2014 +0200
>
>    gcc 4.9 by default does some optimizations that break perl (#121505)
>
>    Patch by Tony Cook
>
>commit 00051dd553979bd2a1dee100c324b59ee76a49e7
>Author: H.Merijn Brand <h.m.brand@xs4all.nl>
>Date:   Wed Apr 9 12:31:23 2014 +0200
>
>    -fwrapv is broken prior to gcc-4.3 (googled and patched by Zefram)
>
>Signed-off-by: Petr PÃsaÅ <ppisar@redhat.com>
>---
> Configure | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
>diff --git a/Configure b/Configure
>index 37b49c8..47e7b8f 100755
>--- a/Configure
>+++ b/Configure
>@@ -4520,6 +4520,22 @@ case "$gccversion" in
>     $rm -f try try.*
> esac
> 
>+# gcc 4.9 by default does some optimizations that break perl.
>+# see ticket 121505.
>+#
>+# The -fwrapv disables those optimizations (and probably others,) so
>+# for gcc 4.9 (and later, since the optimizations probably won't go
>+# away), add -fwrapv unless the user requests -fno-wrapv, which
>+# disables -fwrapv, or if the user requests -fsanitize=undefined,
>+# which turns the overflows -fwrapv ignores into runtime errors.
>+case "$gccversion" in
>+4.[3-9].*|4.[1-9][0-9]*|[5-9].*|[1-9][0-9]*)
>+    case "$ccflags" in
>+    *-fno-wrapv*|*-fsanitize=undefined*|*-fwrapv*) ;;
>+    *) ccflags="$ccflags -fwrapv" ;;
>+    esac
>+esac
>+
> : What should the include directory be ?
> echo " "
> $echo $n "Hmm...  $c"
>-- 
>1.9.0
>

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Attachments on bug 1082957: 884999