[Guile-commits] GNU Guile branch, stable-2.0, updated. v2.0.3-203-gf5ea049

[Ludovic Courtès]

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- Log -----------------------------------------------------------------
commit f5ea0499a411309014475dc7f7983e827f431af2
Author: Ludovic Courtès <address@hidden>
Date:   Fri Jan 27 22:02:31 2012 +0100

    Build with `-fno-strict-aliasing' when available.
    
    * configure.ac (POTENTIAL_GCC_CFLAGS): Add `-fno-strict-aliasing'.
      Suggested by Mark H. Weaver.

-----------------------------------------------------------------------

Summary of changes:
 configure.ac |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/configure.ac b/configure.ac
index 0455375..ccc5fa5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1527,9 +1527,14 @@ case "$GCC" in
     ## and it became equally exasperating (gcc 2.95 and/or glibc 2.1.2).
     ## -Wundef was removed because Gnulib prevented it (see
     ## <http://thread.gmane.org/gmane.lisp.guile.bugs/5329>.)
+
+    ## Build with `-fno-strict-aliasing' to prevent miscompilation on
+    ## some platforms.  See
+    ## <http://lists.gnu.org/archive/html/guile-devel/2012-01/msg00487.html>.
+
     POTENTIAL_GCC_CFLAGS="-Wall -Wmissing-prototypes \
       -Wdeclaration-after-statement \
-      -Wswitch-enum"
+      -Wswitch-enum -fno-strict-aliasing"
     # Do this here so we don't screw up any of the tests above that might
     # not be "warning free"
     if test "${GUILE_ERROR_ON_WARNING}" = yes


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