| 1 | #include "config.h" |
| 2 | |
| 3 | /* This is a merge of code recommended in the autoconf-2.61 documentation |
| 4 | with that recommended in the autoconf-2.13 documentation, with added |
| 5 | tweaks to heed C_ALLOCA. */ |
| 6 | |
| 7 | #if defined HAVE_ALLOCA_H && !defined C_ALLOCA |
| 8 | # include <alloca.h> |
| 9 | #else |
| 10 | # if defined __GNUC__ && !defined C_ALLOCA |
| 11 | # if !defined alloca |
| 12 | # define alloca __builtin_alloca |
| 13 | # endif |
| 14 | # else |
| 15 | # if defined _AIX |
| 16 | /* Indented so that pre-ansi C compilers will ignore it, rather than |
| 17 | choke on it. Some versions of AIX require this to be the first |
| 18 | thing in the file except for comments and preprocessor directives. */ |
| 19 | #pragma alloca |
| 20 | # else |
| 21 | # if defined _MSC_VER && !defined C_ALLOCA |
| 22 | # include <malloc.h> |
| 23 | # define alloca _alloca |
| 24 | # else |
| 25 | # if !defined alloca |
| 26 | # if defined __STDC__ || defined __hpux |
| 27 | # if defined HAVE_STDDEF_H |
| 28 | # include <stddef.h> |
| 29 | # if defined __cplusplus |
| 30 | extern "C" void *alloca (size_t); |
| 31 | # else |
| 32 | extern void *alloca (size_t); |
| 33 | # endif |
| 34 | # else |
| 35 | extern void *alloca (); |
| 36 | # endif |
| 37 | # else |
| 38 | extern char *alloca (); |
| 39 | # endif |
| 40 | # endif |
| 41 | # endif |
| 42 | # endif |
| 43 | # endif |
| 44 | #endif |