Index: "b/M:\\repo\\mingw-w64-libgpg-error\\libgpg-error-1.15\\configure.ac
===================================================================
--- "b/M:\\repo\\mingw-w64-libgpg-error\\libgpg-error-1.15\\configure.ac
+++ "b/M:\\repo\\mingw-w64-libgpg-error\\libgpg-error-1.15\\configure.ac
@@ -521,3 +521,38 @@
 ***
 G10EOF
 fi
+
+STR_TEST_FAILED=no
+AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#include <windows.h>
+typedef struct
+{
+  long _vers;
+  union {
+    volatile char _priv[8];
+    long _x_align;
+    long *_xp_align;
+  } u;
+} gpgrt_lock_t;
+
+#pragma pack(push, 8)
+typedef struct
+{
+  long vers;
+  volatile long initdone;
+  volatile long started;
+  CRITICAL_SECTION csec;
+} _gpgrt_lock_t;
+#pragma pack(pop)
+
+    int main() {	
+	return (sizeof (gpgrt_lock_t) < sizeof (_gpgrt_lock_t)) ? 1 : 0;
+    }
+    ]])],[ac_cv_sin_port_size=long],[STR_TEST_FAILED=yes],[])
+echo "TEST FAILED=$STR_TEST_FAILED"
+if test $STR_TEST_FAILED == "yes"; then
+AC_MSG_ERROR([[
+***
+*** STR_TEST_FAILED !!!!
+***]])
+fi
\ No newline at end of file