Clean up comments, and update information on file locking.

[nmh] / configure.ac

diff --git a/configure.ac b/configure.ac
index 38e2a58bf5fd16498cba625ef805e4bfe1e72e22..520c8d42dbdcb44850feaeac9b2a5bd38dd18fde 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -121,6 +121,20 @@ if test "$GCC" = yes; then
        [nmh_cv_has_dash_ansi=no])
      CPPFLAGS="$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