Fix flag that clang knows nothing about.

[awesomized/libmemcached] / m4 / ax_harden_compiler_flags.m4

diff --git a/m4/ax_harden_compiler_flags.m4 b/m4/ax_harden_compiler_flags.m4
index b847432141366f6df4e08269e55e5e286c37a770..4d647996dcd466f0ac97aa2cb9fa5772ebcebd3c 100644 (file)
--- a/m4/ax_harden_compiler_flags.m4
+++ b/m4/ax_harden_compiler_flags.m4
@@ -8,7 +8,7 @@
 #
 # DESCRIPTION
 #
-#   Any compiler flag that "hardens" or tests code.
+#   Any compiler flag that "hardens" or tests code. C99 is assumed.
 #
 #   NOTE: Implementation based on AX_APPEND_FLAG.
 #
@@ -45,28 +45,76 @@
 #  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 #  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#serial 1
+# The Following flags are not checked for
+# -Wdeclaration-after-statement is counter to C99
+# AX_APPEND_COMPILE_FLAGS([-std=c++11]) -- Not ready yet
+# AX_APPEND_COMPILE_FLAGS([-pedantic]) -- ?
+# AX_APPEND_COMPILE_FLAGS([-Wstack-protector]) -- Issues on 32bit compile
+# AX_APPEND_COMPILE_FLAGS([-fstack-protector-all]) -- Issues on 32bit compile
+# AX_APPEND_COMPILE_FLAGS([-Wlong-long]) -- Don't turn on for compatibility issues memcached_stat_st
 
-AC_DEFUN([AX_HARDEN_COMPILER_FLAGS],
-[AC_REQUIRE([AX_CHECK_COMPILE_FLAG])
-AC_REQUIRE([AX_APPEND_FLAG])
-AC_REQUIRE([AX_CHECK_LINK_FLAG])
-AX_APPEND_COMPILE_FLAGS([-O2])
-AX_APPEND_COMPILE_FLAGS([-Werror])
-AX_APPEND_COMPILE_FLAGS([-Wall])
-AX_APPEND_COMPILE_FLAGS([-Wextra])
-AX_APPEND_COMPILE_FLAGS([-Wmaybe-uninitialized])
-AX_APPEND_COMPILE_FLAGS([-Wsign-compare])
-AX_APPEND_COMPILE_FLAGS([-Wunused-result])
-AX_APPEND_COMPILE_FLAGS([-Wunused-variable])
-AX_APPEND_COMPILE_FLAGS([-floop-parallelize-all])
-AX_APPEND_COMPILE_FLAGS([-fstack-protector-all])
-AX_APPEND_COMPILE_FLAGS([-ggdb])
-AX_APPEND_COMPILE_FLAGS([-fstack-protector-all])
-AX_APPEND_COMPILE_FLAGS([-Wstack-protector])
-AX_APPEND_COMPILE_FLAGS([-fwrapv])
-AX_APPEND_COMPILE_FLAGS([-D_FORTIFY_SOURCE=2])
-AX_APPEND_COMPILE_FLAGS([--param],[ssp-buffer-size=1])
-AX_CHECK_LINK_FLAG([-Werror])
-AX_CHECK_LINK_FLAG([-z relro -z now])
-])dnl AX_HARDEN_COMPILER_FLAGS
+#serial 2
+
+  AC_DEFUN([AX_HARDEN_C_COMPILER_FLAGS], [
+      AC_REQUIRE([AX_APPEND_COMPILE_FLAGS])
+      AC_REQUIRE([AX_CHECK_LINK_FLAG])
+      AC_REQUIRE([AX_VCS_CHECKOUT])
+
+      AC_LANG_PUSH([C])
+      AX_APPEND_COMPILE_FLAGS([-O2])
+      AX_APPEND_COMPILE_FLAGS([-Werror])
+      AX_APPEND_COMPILE_FLAGS([-Wall])
+      AX_APPEND_COMPILE_FLAGS([-Wextra])
+      AX_APPEND_COMPILE_FLAGS([-std=c99])
+      AX_APPEND_COMPILE_FLAGS([-Wbad-function-cast])
+      AX_APPEND_COMPILE_FLAGS([-Wmissing-prototypes])
+      AX_APPEND_COMPILE_FLAGS([-Wnested-externs])
+      AX_APPEND_COMPILE_FLAGS([-Wold-style-definition])
+      AX_APPEND_COMPILE_FLAGS([-Woverride-init])
+      AX_APPEND_COMPILE_FLAGS([-Wstrict-prototypes])
+      AX_APPEND_COMPILE_FLAGS([-Wlogical-op])
+      AC_LANG_POP
+      ])
+
+  AC_DEFUN([AX_HARDEN_CC_COMPILER_FLAGS], [
+      AC_REQUIRE([AX_HARDEN_C_COMPILER_FLAGS])
+      AC_LANG_PUSH([C++])
+      AX_APPEND_COMPILE_FLAGS([-O2])
+      AX_APPEND_COMPILE_FLAGS([-Werror])
+      AX_APPEND_COMPILE_FLAGS([-Wall])
+      AX_APPEND_COMPILE_FLAGS([-Wextra])
+      AX_APPEND_COMPILE_FLAGS([-Wpragmas])
+      AX_APPEND_COMPILE_FLAGS([--paramssp-buffer-size=1])
+      AX_APPEND_COMPILE_FLAGS([-D_FORTIFY_SOURCE=2])
+      AX_APPEND_COMPILE_FLAGS([-Waddress])
+      AX_APPEND_COMPILE_FLAGS([-Warray-bounds])
+      AX_APPEND_COMPILE_FLAGS([-Wchar-subscripts])
+      AX_APPEND_COMPILE_FLAGS([-Wcomment])
+      AX_APPEND_COMPILE_FLAGS([-Wctor-dtor-privacy])
+      AX_APPEND_COMPILE_FLAGS([-Wfloat-equal])
+      AX_APPEND_COMPILE_FLAGS([-Wformat=2])
+      AX_APPEND_COMPILE_FLAGS([-Wmaybe-uninitialized])
+      AX_APPEND_COMPILE_FLAGS([-Wmissing-field-initializers])
+      AX_APPEND_COMPILE_FLAGS([-Wmissing-noreturn])
+      AX_APPEND_COMPILE_FLAGS([-Wlogical-op])
+      AX_APPEND_COMPILE_FLAGS([-Wnon-virtual-dtor])
+      AX_APPEND_COMPILE_FLAGS([-Wnormalized=id])
+      AX_APPEND_COMPILE_FLAGS([-Woverloaded-virtual])
+      AX_APPEND_COMPILE_FLAGS([-Wpointer-arith])
+      AX_APPEND_COMPILE_FLAGS([-Wredundant-decls])
+      AX_APPEND_COMPILE_FLAGS([-Wshadow])
+      AX_APPEND_COMPILE_FLAGS([-Wshorten-64-to-32])
+      AX_APPEND_COMPILE_FLAGS([-Wsign-compare])
+      AX_APPEND_COMPILE_FLAGS([-Wstrict-overflow=1])
+      AX_APPEND_COMPILE_FLAGS([-Wswitch-enum])
+      AX_APPEND_COMPILE_FLAGS([-Wundef])
+      AX_APPEND_COMPILE_FLAGS([-Wunused-result])
+      AX_APPEND_COMPILE_FLAGS([-Wunused-variable])
+      AX_APPEND_COMPILE_FLAGS([-Wwrite-strings])
+      AX_APPEND_COMPILE_FLAGS([-floop-parallelize-all])
+      AX_APPEND_COMPILE_FLAGS([-fwrapv])
+      AX_APPEND_COMPILE_FLAGS([-ggdb])
+      AX_CHECK_LINK_FLAG([-Werror])
+      AX_CHECK_LINK_FLAG([-z relro -z now])
+      AC_LANG_POP
+  ])