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-rw-r--r--Utilities/cmexpat/lib/expat_external.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/Utilities/cmexpat/lib/expat_external.h b/Utilities/cmexpat/lib/expat_external.h
index 07a3c5c..d60eecc 100644
--- a/Utilities/cmexpat/lib/expat_external.h
+++ b/Utilities/cmexpat/lib/expat_external.h
@@ -95,7 +95,10 @@ extern "C" {
#endif
#ifdef XML_UNICODE_WCHAR_T
-#define XML_UNICODE
+# define XML_UNICODE
+# if defined(__SIZEOF_WCHAR_T__) && (__SIZEOF_WCHAR_T__ != 2)
+# error "sizeof(wchar_t) != 2; Need -fshort-wchar for both Expat and libc"
+# endif
#endif
#ifdef XML_UNICODE /* Information is UTF-16 encoded. */