X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/7d7ed69eff25da303b3472f16a25289cf663b3f3..43a65e9777214029046fe7a1427493e6e503a717:/configure.ac

diff --git a/configure.ac b/configure.ac
index a8072050..f206b809 100644
--- a/configure.ac
+++ b/configure.ac
@@ -97,6 +97,13 @@ if test x"$enable_debug" = x"yes"; then
   test -z "$LDFLAGS" && LDFLAGS=-g
 fi
 
+dnl Use SunStudio cc, with -v, on Solaris if user didn't set CC.
+if test -z "$CC"  -a  -d /opt/solarisstudio12.3/bin; then
+  CC=/opt/solarisstudio12.3/bin/cc; export CC
+  ${CC} -V
+  CFLAGS="${CFLAGS:+$CFLAGS }-v"
+fi
+
 AC_PROG_CC
 AM_PROG_CC_C_O
 
@@ -107,23 +114,37 @@ 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 "$GCC" = yes; then
-    AC_CACHE_CHECK([whether we can use -ansi with gcc], [nmh_cv_has_dash_ansi],
-      [nmh_saved_cppflags="$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="$nmh_saved_cflags"])
-  else
-    nmh_cv_has_dash_ansi=no
+  AC_CACHE_CHECK([whether we can use -ansi with gcc], [nmh_cv_has_dash_ansi],
+    [nmh_saved_cppflags="$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="$nmh_saved_cflags"])
+
+  dnl Disable clang complaint about unused -ansi when linking.
+  AC_CACHE_CHECK([whether linker supports -Qunused-arguments],
+                 [nmh_cv_has_q_unused_arguments],
+    [nmh_saved_ldflags="$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"])
+
+  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
+fi
 
 dnl if the user hasn't specified CFLAGS, then
 dnl   if compiler is gcc, then