Only add -Qunused-arguments to LDFLAGS if compiler is clang.

diff --git a/configure.ac b/configure.ac
index 434efaa..4f7229a 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -167,18 +167,17 @@ AC_SUBST([POSTLINK])
 dnl -----------------
 dnl CUSTOMIZE LDFLAGS
 dnl -----------------
 dnl -----------------
 dnl CUSTOMIZE LDFLAGS
 dnl -----------------

-if test "$GCC" = yes; then
+AS_IF([test "$GCC" = yes  &&  `${CC} --version 2>&1 | grep clang >/dev/null`],

   dnl Disable clang complaint about unused -ansi when linking.
   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="$nmh_saved_ldflags"])
-  test "$nmh_cv_has_q_unused_arguments" = "yes"  &&  \
-    LDFLAGS="${LDFLAGS:+$LDFLAGS }-Qunused-arguments"
-fi
+  [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="$nmh_saved_ldflags"])])
+test "$nmh_cv_has_q_unused_arguments" = "yes"  &&  \
+  LDFLAGS="${LDFLAGS:+$LDFLAGS }-Qunused-arguments"

 
 dnl This hack turns off assertions by default, assuming
 dnl that configure still uses this shell variable.  Without
 
 dnl This hack turns off assertions by default, assuming
 dnl that configure still uses this shell variable.  Without