[coreboot-gerrit] Change in coreboot[master]: commonlib/helpers: Add alloca() macro

[Patrick Georgi (Code Review)]

Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/36387 )

Change subject: commonlib/helpers: Add alloca() macro
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commonlib/helpers: Add alloca() macro

If there is no alloca() macro defined, then define it as
__builtin_alloca(), as most compilers support that as an intrinsic
instead, if no alloca.h is included.

Change-Id: I8730d57ce7c2f323b52e7a5720c598fb7af16b44
Signed-off-by: Tim Wawrzynczak 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36387
Reviewed-by: Julius Werner 
Reviewed-by: Furquan Shaikh 
Tested-by: build bot (Jenkins) 
---
M src/commonlib/include/commonlib/helpers.h
1 file changed, 4 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Furquan Shaikh: Looks good to me, approved
  Julius Werner: Looks good to me, approved

diff --git a/src/commonlib/include/commonlib/helpers.h b/src/commonlib/include/commonlib/helpers.h
index 4429ea4..f3b71d7 100644
--- a/src/commonlib/include/commonlib/helpers.h
+++ b/src/commonlib/include/commonlib/helpers.h
@@ -137,4 +137,8 @@
 #define __unused __attribute__((unused))
 #endif

+#ifndef alloca
+#define alloca(x) __builtin_alloca(x)
+#endif
+
 #endif /* COMMONLIB_HELPERS_H */