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-rw-r--r--Source/cmSystemTools.cxx4
1 files changed, 4 insertions, 0 deletions
diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx
index 8eec1e2..02060ca 100644
--- a/Source/cmSystemTools.cxx
+++ b/Source/cmSystemTools.cxx
@@ -1866,7 +1866,11 @@ long copy_data(struct archive *ar, struct archive *aw)
long r;
const void *buff;
size_t size;
+#if defined(ARCHIVE_VERSION_NUMBER) && ARCHIVE_VERSION_NUMBER >= 3000000
+ __LA_INT64_T offset;
+#else
off_t offset;
+#endif
for (;;)
{