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Don't blindly provide alloca() for all compilers -- it is too implementation

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dependent.  Instead provide one for GCC & Intel's GCC copy and one for lint.
Anyone using any other translator tool needs to look closely at how that tool
can handle alloca.
This commit is contained in:
David E. O'Brien 2003-06-25 18:11:32 +00:00
parent 1300bbb70e
commit d7875fc3b3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=116831
1 changed files with 5 additions and 4 deletions
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9
include/stdlib.h
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@ -222,7 +222,6 @@ extern const char *_malloc_options;
extern void (*_malloc_message)(const char *, const char *, const char *, extern void (*_malloc_message)(const char *, const char *, const char *,
const char *); const char *);
#ifndef alloca
/* /*
* The alloca() function can't be implemented in C, and on some * The alloca() function can't be implemented in C, and on some
* platforms it can't be implemented at all as a callable function. * platforms it can't be implemented at all as a callable function.
@ -232,11 +231,13 @@ extern void (*_malloc_message)(const char *, const char *, const char *,
* programs which use it will fail to link when compiled with non-GNU * programs which use it will fail to link when compiled with non-GNU
* compilers. * compilers.
*/ */
#if defined(__GNUC__) || defined(__INTEL_COMPILER) #if __GNUC__ >= 2 || defined(__INTEL_COMPILER)
#undef alloca /* some GNU bits try to get cute and define this on their own */
#define alloca(sz) __builtin_alloca(sz) #define alloca(sz) __builtin_alloca(sz)
#else #elif defined(lint)
void *alloca(size_t); void *alloca(size_t);
#endif #error Please add alloca support on all FreeBSD architectures for this compiler.
#else
#endif #endif
__uint32_t __uint32_t