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-rw-r--r--Source/CTest/Curl/config.h.in2
1 files changed, 1 insertions, 1 deletions
diff --git a/Source/CTest/Curl/config.h.in b/Source/CTest/Curl/config.h.in
index 560207f..980b972 100644
--- a/Source/CTest/Curl/config.h.in
+++ b/Source/CTest/Curl/config.h.in
@@ -469,7 +469,7 @@
System headers sometimes define this.
We just want to avoid a redefinition error message. */
#ifndef _ALL_SOURCE
-# undef _ALL_SOURCE
+#cmakedefine _ALL_SOURCE ${_ALL_SOURCE}
#endif
/* Number of bits in a file offset, on hosts where this is settable. */