$NetBSD: patch-ae,v 1.2 2015/12/29 23:34:53 dholland Exp $

Use memcpy correctly. See patch-ac.

XXX: what's the ac_xexeext hunk about?

${LIBM} is defined as -lm if we're using the system math library; otherwise
it's blank.  This should configure everything properly downstream.

--- configure.orig	2007-02-08 04:39:29.000000000 -0500
+++ configure
@@ -3894,7 +3894,7 @@ cat >>conftest.$ac_ext <<_ACEOF
 #include <stdlib.h>
 #include <stdarg.h>
 #include <string.h>
-#define DO_VA_COPY(d, s) memcpy((void *)&(d), (void *)&(s))
+#define DO_VA_COPY(d, s) memcpy((void *)&(d), (void *)&(s), sizeof((s)))
 void test(char *str, ...)
 {
     va_list ap, ap2;
@@ -3975,7 +3975,7 @@ cat >>conftest.$ac_ext <<_ACEOF
 #include <stdlib.h>
 #include <stdarg.h>
 #include <string.h>
-#define DO_VA_COPY(d, s) memcpy((void *)(d), (void *)(s))
+#define DO_VA_COPY(d, s) memcpy((void *)(d), (void *)(s), sizeof(*(s)))
 void test(char *str, ...)
 {
     va_list ap, ap2;
@@ -4338,7 +4338,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
 fi
 
 rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
-      conftest$ac_exeext conftest.$ac_ext
+      conftest$ac_xexeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
 { echo "$as_me:$LINENO: result: $ac_cv_lib_m_floor" >&5
@@ -4348,7 +4348,9 @@ if test $ac_cv_lib_m_floor = yes; then
 #define HAVE_LIBM 1
 _ACEOF
 
-  LIBS="-lm $LIBS"
+if test "x$LIBM" != x; then
+  LIBS="${LIBM} $LIBS"
+fi
 
 fi