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* libiberty.h (alloca): Handle setting C_ALLOCA.

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From-SVN: r40978
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Kaveh R. Ghazi 2001-03-31 18:59:56 +00:00 • committed by Kaveh Ghazi
parent 7656d28aed
commit cc56c744ee
2 changed files with 10 additions and 1 deletions
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4
include/ChangeLog
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@ -1,3 +1,7 @@
2001-03-31 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* libiberty.h (alloca): Handle setting C_ALLOCA.
2001-03-20 Jim Blandy <jimb@redhat.com> 2001-03-20 Jim Blandy <jimb@redhat.com>
* demangle.h (enum gnu_v3_constructor_kinds, * demangle.h (enum gnu_v3_constructor_kinds,

7
include/libiberty.h
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@ -238,15 +238,20 @@ extern int vasprintf PARAMS ((char **, const char *, va_list))
/* Drastically simplified alloca configurator. If we're using GCC, /* Drastically simplified alloca configurator. If we're using GCC,
we use __builtin_alloca; otherwise we use the C alloca. The C we use __builtin_alloca; otherwise we use the C alloca. The C
alloca is always available. You can override GCC by defining alloca is always available. You can override GCC by defining
USE_C_ALLOCA yourself. */ USE_C_ALLOCA yourself. The canonical autoconf macro C_ALLOCA is
also set/unset as it is often used to indicate whether code needs
to call alloca(0). */
extern PTR C_alloca PARAMS((size_t)); extern PTR C_alloca PARAMS((size_t));
#undef alloca #undef alloca
#if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA #if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
# define alloca(x) __builtin_alloca(x) # define alloca(x) __builtin_alloca(x)
# undef C_ALLOCA
#else #else
# define alloca(x) C_alloca(x) # define alloca(x) C_alloca(x)
# undef USE_C_ALLOCA # undef USE_C_ALLOCA
# define USE_C_ALLOCA 1 # define USE_C_ALLOCA 1
# undef C_ALLOCA
# define C_ALLOCA 1
#endif #endif
#ifdef __cplusplus #ifdef __cplusplus