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-rw-r--r--alloca.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/alloca.c b/alloca.c
index bc34529..30efa5a 100644
--- a/alloca.c
+++ b/alloca.c
@@ -60,6 +60,17 @@ typedef char *pointer;
#define NULL 0
+/* Different portions of Emacs need to call different versions of
+ malloc. The Emacs executable needs alloca to call xmalloc, because
+ ordinary malloc isn't protected from input signals. On the other
+ hand, the utilities in lib-src need alloca to call malloc; some of
+ them are very simple, and don't have an xmalloc routine.
+
+ Everybody else should just call malloc. */
+#ifndef emacs
+extern pointer malloc ();
+#endif
+
/* Define STACK_DIRECTION if you know the direction of stack
growth for your system; otherwise it will be automatically
deduced at run-time.