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Build with `-fno-strict-aliasing' when available.

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* configure.ac (POTENTIAL_GCC_CFLAGS): Add `-fno-strict-aliasing'.
  Suggested by Mark H. Weaver.
This commit is contained in:
Ludovic Courtès 2012-01-27 22:02:31 +01:00
parent 04b2d77354
commit f5ea0499a4
1 changed files with 6 additions and 1 deletions
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7
configure.ac
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@ -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