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Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/configure.in b/configure.in index 197a4a4ed..a9e4c289a 100644 --- a/configure.in +++ b/configure.in @@ -425,6 +425,22 @@ AC_SUBST([WITH_PLUGINS]) # +# -O2 implies -fstrict-aliasing, but the code is not safe for that +# +AC_MSG_CHECKING([whether $CC supports -fno-strict-aliasing]) +OLD_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -fno-strict-aliasing" +AC_COMPILE_IFELSE( + [int foo;], + [AC_MSG_RESULT([yes])], + [ + AC_MSG_RESULT([no]) + CFLAGS="$OLD_CFLAGS" + ] +) + + +# # DB_MANUAL_CAST_TO_UNION # AC_MSG_CHECKING([whether $CC is able to typecast to union]) |