ncurses 5.9 - patch 20120616

[ncurses.git] / test / aclocal.m4

diff --git a/test/aclocal.m4 b/test/aclocal.m4
index 0b3a3ac1fbd108220decd5c6379d52d38afe12fc..c635780bf639df9e4ca1fabfd13afcf3e52159ba 100644 (file)
--- a/test/aclocal.m4
+++ b/test/aclocal.m4
@@ -26,7 +26,7 @@ dnl sale, use or other dealings in this Software without prior written       *
 dnl authorization.                                                           *
 dnl***************************************************************************
 dnl
-dnl $Id: aclocal.m4,v 1.75 2012/04/01 00:14:58 tom Exp $
+dnl $Id: aclocal.m4,v 1.76 2012/06/16 19:23:41 tom Exp $
 dnl
 dnl Author: Thomas E. Dickey
 dnl
@@ -480,6 +480,39 @@ AC_TRY_LINK([#include <stdio.h>],[printf("Hello world");],,
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
+dnl CF_CLANG_COMPILER version: 1 updated: 2012/06/16 14:55:39
+dnl -----------------
+dnl Check if the given compiler is really clang.  clang's C driver defines
+dnl __GNUC__ (fooling the configure script into setting $GCC to yes) but does
+dnl not ignore some gcc options.
+dnl
+dnl This macro should be run "soon" after AC_PROG_CC or AC_PROG_CPLUSPLUS, to
+dnl ensure that it is not mistaken for gcc/g++.  It is normally invoked from
+dnl the wrappers for gcc and g++ warnings.
+dnl
+dnl $1 = GCC (default) or GXX
+dnl $2 = INTEL_COMPILER (default) or INTEL_CPLUSPLUS
+dnl $3 = CFLAGS (default) or CXXFLAGS
+AC_DEFUN([CF_CLANG_COMPILER],[
+ifelse([$2],,CLANG_COMPILER,[$2])=no
+
+if test "$ifelse([$1],,[$1],GCC)" = yes ; then
+       AC_MSG_CHECKING(if this is really Clang ifelse([$1],GXX,C++,C) compiler)
+       cf_save_CFLAGS="$ifelse([$3],,CFLAGS,[$3])"
+       ifelse([$3],,CFLAGS,[$3])="$ifelse([$3],,CFLAGS,[$3]) -Qunused-arguments"
+       AC_TRY_COMPILE([],[
+#ifdef __clang__
+#else
+make an error
+#endif
+],[ifelse([$2],,CLANG_COMPILER,[$2])=yes
+cf_save_CFLAGS="$cf_save_CFLAGS -Qunused-arguments"
+],[])
+       ifelse([$3],,CFLAGS,[$3])="$cf_save_CFLAGS"
+       AC_MSG_RESULT($ifelse([$2],,CLANG_COMPILER,[$2]))
+fi
+])
+dnl ---------------------------------------------------------------------------
 dnl CF_CURSES_ACS_MAP version: 6 updated: 2010/10/23 15:54:49
 dnl -----------------
 dnl Check for likely values of acs_map[]:
@@ -1414,7 +1447,7 @@ if test "$GCC" = yes ; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_GCC_WARNINGS version: 28 updated: 2012/03/31 20:10:46
+dnl CF_GCC_WARNINGS version: 29 updated: 2012/06/16 14:55:39
 dnl ---------------
 dnl Check if the compiler supports useful warning options.  There's a few that
 dnl we don't use, simply because they're too noisy:
@@ -1437,6 +1470,7 @@ AC_DEFUN([CF_GCC_WARNINGS],
 [
 AC_REQUIRE([CF_GCC_VERSION])
 CF_INTEL_COMPILER(GCC,INTEL_COMPILER,CFLAGS)
+CF_CLANG_COMPILER(GCC,CLANG_COMPILER,CFLAGS)
 
 cat > conftest.$ac_ext <<EOF
 #line __oline__ "${as_me:-configure}"