+dnl -----------------
+dnl CUSTOMIZE LDFLAGS
+dnl -----------------
+if test "$GCC" = yes; then
+ dnl Disable clang complaint about unused -ansi when linking.
+ AC_CACHE_CHECK([whether linker supports -Qunused-arguments],
+ [nmh_cv_has_q_unused_arguments],
+ [nmh_saved_ldflags="$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:+$LDFLAGS }-Qunused-arguments"
+fi
+
+dnl This really shouldn't be necessary. And we really shouldn't add -s.
+if test x"$enable_debug" = x"yes"; then
+ test -z "$LDFLAGS" && LDFLAGS=-g
+else
+ if test -z "$LDFLAGS"; then
+ case "$build_os" in
+ darwin*) LDFLAGS= ;;
+ *) LDFLAGS=-s ;;
+ esac
+ fi
+fi
+
+dnl This hack turns off assertions by default, assuming
+dnl that configure still uses this shell variable. Without
+dnl it, AC_HEADER_ASSERT enables assertions by default.
+test -z "$enable_assert" && enable_assert=no
+
+AC_HEADER_ASSERT
+