| 1 | /* Copyright 2012 Free Software Foundation, Inc. |
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| 2 | |
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| 3 | This program is free software: you can redistribute it and/or modify |
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| 4 | it under the terms of the GNU General Public License as published by |
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| 5 | the Free Software Foundation; either version 3 of the License, or |
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| 6 | (at your option) any later version. |
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| 7 | |
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| 8 | This program is distributed in the hope that it will be useful, |
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| 9 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 11 | GNU General Public License for more details. |
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| 12 | |
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| 13 | You should have received a copy of the GNU General Public License |
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| 14 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
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| 15 | |
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| 16 | #include "config.h" |
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| 17 | |
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| 18 | /* This is a merge of code recommended in the autoconf-2.61 documentation |
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| 19 | with that recommended in the autoconf-2.13 documentation, with added |
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| 20 | tweaks to heed C_ALLOCA. */ |
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| 21 | |
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| 22 | #if defined HAVE_ALLOCA_H && !defined C_ALLOCA |
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| 23 | # include <alloca.h> |
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| 24 | #else |
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| 25 | # if defined __GNUC__ && !defined C_ALLOCA |
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| 26 | # if !defined alloca |
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| 27 | # define alloca __builtin_alloca |
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| 28 | # endif |
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| 29 | # else |
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| 30 | # if defined _AIX |
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| 31 | /* Indented so that pre-ansi C compilers will ignore it, rather than |
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| 32 | choke on it. Some versions of AIX require this to be the first |
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| 33 | thing seen by the compiler except for comments and preprocessor |
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| 34 | directives. */ |
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| 35 | #pragma alloca |
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| 36 | # else |
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| 37 | # if defined _MSC_VER && !defined C_ALLOCA |
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| 38 | # include <malloc.h> |
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| 39 | # define alloca _alloca |
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| 40 | # else |
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| 41 | # if !defined alloca |
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| 42 | # if defined __STDC__ || defined __hpux |
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| 43 | # if defined HAVE_STDDEF_H |
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| 44 | # include <stddef.h> |
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| 45 | # if defined __cplusplus |
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| 46 | extern "C" void *alloca (size_t); |
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| 47 | # else |
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| 48 | extern void *alloca (size_t); |
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| 49 | # endif |
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| 50 | # else |
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| 51 | extern void *alloca (); |
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| 52 | # endif |
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| 53 | # else |
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| 54 | extern char *alloca (); |
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| 55 | # endif |
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| 56 | # endif |
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| 57 | # endif |
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| 58 | # endif |
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| 59 | # endif |
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| 60 | #endif |
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