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configure.ac: strip _GNU_SOURCE from llvm-config output

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Mesa already defines _GNU_SOURCE for glibc based systems and defining
_GNU_SOURCE will break the Mesa build on other systems such as OpenBSD.

_GNU_SOURCE only seems to be included in llvm-config output when
LLVM is built via autoconf and not when it is built by cmake.

Cc: "10.2 10.3" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Jonathan Gray <jsg@jsg.id.au>
(cherry picked from commit c68073e65f)
This commit is contained in:
Jonathan Gray 2014-09-06 01:44:41 +10:00 • committed by Emil Velikov
parent 07426ad102
commit 9f67c26d1b
1 changed files with 1 additions and 0 deletions
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configure.ac
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@ -1655,6 +1655,7 @@ strip_unwanted_llvm_flags() {
# Use \> (marks the end of the word)
echo `$1` | sed \
-e 's/-DNDEBUG\>//g' \
-e 's/-D_GNU_SOURCE\>//g' \
-e 's/-pedantic\>//g' \
-e 's/-Wcovered-switch-default\>//g' \
-e 's/-O.\>//g' \