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-rw-r--r--Build/source/texk/web2c/c-auto.in5
1 files changed, 5 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/c-auto.in b/Build/source/texk/web2c/c-auto.in
index bbe8b558f28..ab57e65e0b1 100644
--- a/Build/source/texk/web2c/c-auto.in
+++ b/Build/source/texk/web2c/c-auto.in
@@ -334,6 +334,11 @@
/* Define for large files, on AIX-style hosts. */
#undef _LARGE_FILES
+/* Define to 1 if type `char' is unsigned and you are not using gcc. */
+#ifndef __CHAR_UNSIGNED__
+# undef __CHAR_UNSIGNED__
+#endif
+
/* Define to empty if `const' does not conform to ANSI C. */
#undef const