1 files changed, 19 insertions, 0 deletions
diff --git a/argp/argp-help.c b/argp/argp-help.c
index baa54c91d6..616db9b47c 100644
--- a/argp/argp-help.c
+++ b/argp/argp-help.c
@@ -26,6 +26,25 @@
 #include <config.h>
 #endif
 
+#ifndef alloca
+# ifdef __GNUC__
+#  define alloca __builtin_alloca
+#  define HAVE_ALLOCA 1
+# else
+#  if defined HAVE_ALLOCA_H || defined _LIBC
+#   include <alloca.h>
+#  else
+#   ifdef _AIX
+ #pragma alloca
+#   else
+#    ifndef alloca
+char *alloca ();
+#    endif
+#   endif
+#  endif
+# endif
+#endif
+
 #include <stddef.h>
 #include <stdlib.h>
 #include <string.h>