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cares-compilers.m4: -Wstrict-aliasing=3 for warning enabled gcc and clang builds

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This commit is contained in:
Yang Tse
2012-06-26 21:22:35 +02:00
parent a85ba35816
commit bc0c3c62cc
1 changed files with 7 additions and 1 deletions
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8
m4/cares-compilers.m4
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@ -15,7 +15,7 @@
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
# serial 70
# serial 71
dnl CARES_CHECK_COMPILER
@ -870,6 +870,7 @@ AC_DEFUN([CARES_SET_COMPILER_WARNING_OPTS], [
tmp_CFLAGS="$tmp_CFLAGS -Wcast-align"
tmp_CFLAGS="$tmp_CFLAGS -Wno-system-headers"
tmp_CFLAGS="$tmp_CFLAGS -Wshorten-64-to-32"
tmp_CFLAGS="$tmp_CFLAGS -Wstrict-aliasing=3"
#
dnl Only clang 1.1 or later
if test "$compiler_num" -ge "101"; then
@ -960,6 +961,11 @@ AC_DEFUN([CARES_SET_COMPILER_WARNING_OPTS], [
tmp_CFLAGS="$tmp_CFLAGS -Wdeclaration-after-statement"
fi
#
dnl Only gcc 4.0 or later
if test "$compiler_num" -ge "400"; then
tmp_CFLAGS="$tmp_CFLAGS -Wstrict-aliasing=3"
fi
#
dnl Only gcc 4.2 or later
if test "$compiler_num" -ge "402"; then
tmp_CFLAGS="$tmp_CFLAGS -Wcast-align"