Removed --posix from awk invocation in test-anno.

[nmh] / configure.ac

diff --git a/configure.ac b/configure.ac
index 0788b9f14e833d0b672b62b3c427e26291d31146..bb42a6ac44456e68cd9f54a3dc960c29c6660733 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -97,9 +97,15 @@ if test x"$enable_debug" = x"yes"; then
   test -z "$LDFLAGS" && LDFLAGS=-g
 fi
 
-AC_PROG_CC
+AC_PROG_CC(cc gcc)
 AM_PROG_CC_C_O
 
+dnl Use -v and some other options with SunStudio cc.
+case `${CC} -V 2>&1` in
+  cc:\ Sun\ C*) CFLAGS="${CFLAGS:+$CFLAGS }-v -errtags=yes"
+                CFLAGS="${CFLAGS} -erroff=E_STATEMENT_NOT_REACHED" ;;
+esac
+
 AC_CACHE_CHECK([whether compiler supports -Wextra], [nmh_cv_has_wextra],
 [nmh_saved_cflags="$CFLAGS"
  CFLAGS="$CFLAGS -Wextra -Werror"
@@ -107,34 +113,33 @@ AC_CACHE_CHECK([whether compiler supports -Wextra], [nmh_cv_has_wextra],
  CFLAGS="$nmh_saved_cflags"])
 
 dnl Can't use -ansi with gcc 4.5.3 on Cygwin, at least through setup
-dnl setup version 2.763, because it disables some features in the
-dnl system system header files and warns about them with -Wall.  Try
-dnl to test for that generally, though still with gcc.
+dnl version 2.763, because it disables some features in the system
+dnl header files and warns about them with -Wall.  Try to test for
+dnl that generally, though still with gcc.
 if test "$GCC" = yes; then
-  AC_CACHE_CHECK([whether we can use -ansi with linker],
-                 [nmh_cv_has_dash_ansi_with_linker],
-    [nmh_saved_ldflags="$LDFLAGS"
-     LDFLAGS="-ansi"
+  AC_CACHE_CHECK([whether we can use -ansi with gcc], [nmh_cv_has_dash_ansi],
+    [nmh_saved_cppflags="$CPPFLAGS"
+     nmh_saved_cflags="$CFLAGS"
+     CPPFLAGS="-D_GNU_SOURCE"
+     CFLAGS="-ansi -Wall -Werror"
      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <time.h>],[tzset();])],
-       [nmh_cv_has_dash_ansi_with_linker=yes],
-       [nmh_cv_has_dash_ansi_with_linker=no])
+       [nmh_cv_has_dash_ansi=yes],
+       [nmh_cv_has_dash_ansi=no])
+     CPPFLAGS="$nmh_saved_cppflags"
+     CFLAGS="$nmh_saved_cflags"])
+
+  dnl Disable clang complaint about unused -ansi when linking.
+  AC_CACHE_CHECK([whether linker supports -Qunused-arguments],
+                 [nmh_cv_has_q_unused_arguments],
+    [nmh_saved_ldflags="$LDFLAGS"
+     LDFLAGS="$LDFLAGS -Qunused-arguments"
+     AC_TRY_LINK([],[],nmh_cv_has_q_unused_arguments=yes,
+                 nmh_cv_has_q_unused_arguments=no)
      LDFLAGS="$nmh_saved_ldflags"])
 
-  dnl Can't use -ansi with the linker on FreeBSD 10.  If -ansi can't
-  dnl be used with the linker, don't try to put it in CFLAGS.
-  if test "$nmh_cv_has_dash_ansi_with_linker" = yes; then
-    AC_CACHE_CHECK([whether we can use -ansi with gcc], [nmh_cv_has_dash_ansi],
-      [nmh_saved_cppflags="$CPPFLAGS"
-       nmh_saved_cflags="$CFLAGS"
-       CPPFLAGS="-D_GNU_SOURCE"
-       CFLAGS="-ansi -Wall -Werror"
-       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <time.h>],[tzset();])],
-         [nmh_cv_has_dash_ansi=yes],
-         [nmh_cv_has_dash_ansi=no])
-       CPPFLAGS="$nmh_saved_cppflags"
-       CFLAGS="$nmh_saved_cflags"])
-  else
-    nmh_cv_has_dash_ansi=no
+  if test "$nmh_cv_has_q_unused_arguments" = "yes"; then
+    test -z "$LDFLAGS" && LDFLAGS=-Qunused-arguments \
+                       || LDFLAGS="$LDFLAGS -Qunused-arguments"
   fi
 else
   nmh_cv_has_dash_ansi=no