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Enable various compiler warnings
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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David Woodhouse authored and David Woodhouse committed Sep 15, 2011
1 parent e43fcd9 commit 37e598aa815a6052cc410381456af19b3b6dee4e
Showing with 81 additions and 0 deletions.
  1. +61 −0 acinclude.m4
  2. +20 −0 configure.ac
@@ -0,0 +1,61 @@
dnl as-compiler-flag.m4 0.1.0

dnl autostars m4 macro for detection of compiler flags

dnl David Schleef <ds@schleef.org>

dnl $Id: as-compiler-flag.m4,v 1.1 2005/12/15 23:35:19 ds Exp $

dnl AS_COMPILER_FLAG(CFLAGS, ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED])
dnl Tries to compile with the given CFLAGS.
dnl Runs ACTION-IF-ACCEPTED if the compiler can compile with the flags,
dnl and ACTION-IF-NOT-ACCEPTED otherwise.

AC_DEFUN([AS_COMPILER_FLAG],
[
AC_MSG_CHECKING([to see if compiler understands $1])
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $1"
AC_TRY_COMPILE([ ], [], [flag_ok=yes], [flag_ok=no])
CFLAGS="$save_CFLAGS"
if test "X$flag_ok" = Xyes ; then
m4_ifvaln([$2],[$2])
true
else
m4_ifvaln([$3],[$3])
true
fi
AC_MSG_RESULT([$flag_ok])
])

dnl AS_COMPILER_FLAGS(VAR, FLAGS)
dnl Tries to compile with the given CFLAGS.

AC_DEFUN([AS_COMPILER_FLAGS],
[
list=$2
flags_supported=""
flags_unsupported=""
AC_MSG_CHECKING([for supported compiler flags])
for each in $list
do
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $each"
AC_TRY_COMPILE([ ], [], [flag_ok=yes], [flag_ok=no])
CFLAGS="$save_CFLAGS"
if test "X$flag_ok" = Xyes ; then
flags_supported="$flags_supported $each"
else
flags_unsupported="$flags_unsupported $each"
fi
done
AC_MSG_RESULT([$flags_supported])
if test "X$flags_unsupported" != X ; then
AC_MSG_WARN([unsupported compiler flags: $flags_unsupported])
fi
$1="$$1 $flags_supported"
])
@@ -5,6 +5,26 @@ AC_LANG_C
AM_INIT_AUTOMAKE([foreign])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

AS_COMPILER_FLAGS(CFLAGS,
"-Wall
-Wextra
-Wno-missing-field-initializers
-Wno-sign-compare
-Wno-unused-parameter
-Werror=pointer-to-int-cast
-Wdeclaration-after-statement
-Werror-implicit-function-declaration
-Wformat-nonliteral
-Wformat-security
-Winit-self
-Wmissing-declarations
-Wmissing-include-dirs
-Wmissing-noreturn
-Wnested-externs
-Wpointer-arith
-Wundef
-Wwrite-strings")

AC_ARG_WITH([openssl],
AS_HELP_STRING([--with-openssl],
[Location of OpenSSL build dir]),

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