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cares-compilers.m4: remove -Wstrict-aliasing=3 from clang

Currently it is unknown if there is any version of clang that
actually supports -Wstrict-aliasing. What is known is that there
are several that don't support it.
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1 parent bc0c3c6 commit 54751f4d33e6788392ac4637865efc216dec2774 @yangtse yangtse committed Jun 29, 2012
Showing with 1 addition and 4 deletions.
  1. +1 −4 m4/cares-compilers.m4
@@ -15,7 +15,7 @@
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
-# serial 71
+# serial 72
dnl CARES_CHECK_COMPILER
@@ -851,8 +851,6 @@ AC_DEFUN([CARES_SET_COMPILER_WARNING_OPTS], [
CLANG)
#
if test "$want_warnings" = "yes"; then
- dnl All versions of clang support the same warnings as at least
- dnl gcc 4.2.1 except -Wunused.
tmp_CFLAGS="$tmp_CFLAGS -pedantic"
tmp_CFLAGS="$tmp_CFLAGS -Wall -Wextra"
tmp_CFLAGS="$tmp_CFLAGS -Wpointer-arith -Wwrite-strings"
@@ -870,7 +868,6 @@ 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

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