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-rwxr-xr-xunix/configure1
1 files changed, 1 insertions, 0 deletions
diff --git a/unix/configure b/unix/configure
index 7270049..b71cdaa 100755
--- a/unix/configure
+++ b/unix/configure
@@ -2823,6 +2823,7 @@ cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
#include <ctype.h>
+#include <stdlib.h>
#if ((' ' & 0x0FF) == 0x020)
# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))