upgraded compatibility

git-svn-id: https://asn1c.svn.sourceforge.net/svnroot/asn1c/trunk@1389 59561ff5-6e30-0410-9f3c-9617f08c8826
diff --git a/configure.in b/configure.in
index 941c7c4..1bbbb75 100644
--- a/configure.in
+++ b/configure.in
@@ -77,6 +77,10 @@
 
 AC_CHECK_FUNCS(strtoimax strtoll)
 AC_CHECK_FUNCS(mergesort)
+AC_CHECK_FUNCS(mkstemps)
+
+dnl For mingw
+AC_CHECK_LIB(iberty, getopt)
 
 AM_CONFIG_HEADER(config.h)