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Message-Id: <20191119095634.24434-1-mforney@mforney.org>
Date: Tue, 19 Nov 2019 01:56:34 -0800
From: Michael Forney <mforney@...rney.org>
To: musl@...ts.openwall.com
Subject: [PATCH v2] Unconditonally define alloca as __builtin_alloca
This enables alternative compilers, which may not define __GNUC__,
to implement alloca, which is still fairly widely used.
This is similar to how stdarg.h already works in musl; compilers must
implement __builtin_va_arg, there is no fallback definition.
---
On 2019-11-19, Szabolcs Nagy <nsz@...t70.net> wrote:
> i don't think removing the prototype is a good idea.
>
> alloca is a builtin in gcc and won't generate an extern
> call even without optimization, so things work now with
> #undef alloca
OK, added back in v2.
include/alloca.h | 2 --
1 file changed, 2 deletions(-)
diff --git a/include/alloca.h b/include/alloca.h
index d2e6f1c6..b8d183d1 100644
--- a/include/alloca.h
+++ b/include/alloca.h
@@ -10,9 +10,7 @@ extern "C" {
void *alloca(size_t);
-#ifdef __GNUC__
#define alloca __builtin_alloca
-#endif
#ifdef __cplusplus
}
--
2.20.1
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