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Use GCC's internal built-in alloca implementation, when available.

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Submitted by:	DES
This commit is contained in:
David E. O'Brien 2003-06-14 06:01:35 +00:00
parent 50a7fdaed8
commit 4bf015d562
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=116326
1 changed files with 5 additions and 0 deletions
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5
sys/sys/cdefs.h
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@ -142,6 +142,11 @@
#define __section(x) __attribute__((__section__(x)))
#endif
#endif
#ifdef __GNUC__
#define alloca(sz) __builtin_alloca(sz)
#else
#error FreeBSD alloca support needed for this compiler
#endif
/* XXX: should use `#if __STDC_VERSION__ < 199901'. */
#if !(__GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ >= 3)