| 1 | /* Some autoconf-unrelated preprocessor magic that needs to be done
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| 2 | before including the system includes and therefore cannot belong in
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| 3 | sysdep.h. This file is included at the bottom of config.h. */
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| 4 |
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| 5 | /* Alloca-related defines, straight out of the Autoconf manual. */
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| 6 |
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| 7 | /* AIX requires this to be the first thing in the file. */
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| 8 | #ifndef __GNUC__
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| 9 | # if HAVE_ALLOCA_H
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| 10 | # include <alloca.h>
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| 11 | # else
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| 12 | # ifdef _AIX
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| 13 | #pragma alloca
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| 14 | # else
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| 15 | # ifndef alloca /* predefined by HP cc +Olibcalls */
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| 16 | void *alloca ();
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| 17 | # endif
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| 18 | # endif
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| 19 | # endif
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| 20 | #endif
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| 21 |
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| 22 | #ifdef __sun
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| 23 | # ifdef __SVR4
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| 24 | # define solaris
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| 25 | # endif
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| 26 | #endif
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| 27 |
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| 28 | /* The "namespace tweaks" below attempt to set a friendly "compilation
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| 29 | environment" under popular operating systems. Default compilation
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| 30 | environment often means that some functions that are "extensions"
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| 31 | are not declared -- `strptime' is one example.
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| 32 |
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| 33 | But non-default environments can expose bugs in the system header
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| 34 | files, crippling compilation in _very_ non-obvious ways. Because
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| 35 | of that, we define them only on well-tested architectures where we
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| 36 | know they will work. */
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| 37 |
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| 38 | #undef NAMESPACE_TWEAKS
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| 39 |
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| 40 | #ifdef solaris
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| 41 | # define NAMESPACE_TWEAKS
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| 42 | #endif
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| 43 |
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| 44 | #ifdef __linux__
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| 45 | # define NAMESPACE_TWEAKS
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| 46 | #endif
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| 47 |
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| 48 | #ifdef NAMESPACE_TWEAKS
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| 49 |
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| 50 | /* Request the "Unix 98 compilation environment". */
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| 51 | #define _XOPEN_SOURCE 500
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| 52 |
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| 53 | /* For Solaris: request everything else that is available and doesn't
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| 54 | conflict with the above. */
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| 55 | #define __EXTENSIONS__
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| 56 |
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| 57 | /* For Linux: request features of 4.3BSD and SVID (System V Interface
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| 58 | Definition). */
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| 59 | #define _SVID_SOURCE
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| 60 | #define _BSD_SOURCE
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| 61 |
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| 62 | #endif /* NAMESPACE_TWEAKS */
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| 63 |
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| 64 | /* Determine whether to use stdarg. Use it only if the compiler
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| 65 | supports ANSI C and stdarg.h is present. We check for both because
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| 66 | there are configurations where stdarg.h exists, but doesn't work.
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| 67 | This check cannot be in sysdep.h because we use it to choose which
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| 68 | system headers to include. */
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| 69 | #ifndef WGET_USE_STDARG
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| 70 | # ifdef __STDC__
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| 71 | # ifdef HAVE_STDARG_H
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| 72 | # define WGET_USE_STDARG
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| 73 | # endif
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| 74 | # endif
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| 75 | #endif /* not WGET_USE_STDARG */
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