X-Git-Url: http://sjero.net/git/?a=blobdiff_plain;f=src%2Fsysdep.h;fp=src%2Fsysdep.h;h=580e3d55b3fd1312d7418e1460fd70d42876d902;hb=212396c7e1de6592294f92230254afdfd553843c;hp=9f775ce77583949285288c8ad75eec0c7d09388d;hpb=27ed78ddd6fd300a3c630a2029432241776215b7;p=wget

diff --git a/src/sysdep.h b/src/sysdep.h
index 9f775ce7..580e3d55 100644
--- a/src/sysdep.h
+++ b/src/sysdep.h
@@ -33,6 +33,78 @@ so, delete this exception statement from your version.  */
 #ifndef SYSDEP_H
 #define SYSDEP_H
 
+/* Testing for __sun is not enough because it's also defined on SunOS.  */
+#ifdef __sun
+# ifdef __SVR4
+#  define solaris
+# endif
+#endif
+
+/* The "namespace tweaks" below attempt to set a friendly "compilation
+   environment" under popular operating systems.  Default compilation
+   environment often means that some functions that are "extensions"
+   are not declared -- `strptime' is one example.
+
+   But non-default environments can expose bugs in the system header
+   files, crippling compilation in _very_ non-obvious ways.  Because
+   of that, we define them only on well-tested architectures where we
+   know they will work.  */
+
+#undef NAMESPACE_TWEAKS
+
+#ifdef solaris
+# define NAMESPACE_TWEAKS
+#endif
+
+#ifdef __linux__
+# define NAMESPACE_TWEAKS
+#endif
+
+#ifdef NAMESPACE_TWEAKS
+
+/* Request the "Unix 98 compilation environment". */
+#define _XOPEN_SOURCE 500
+
+/* For Solaris: request everything else that is available and doesn't
+   conflict with the above.  */
+#define __EXTENSIONS__
+
+/* For Linux: request features of 4.3BSD and SVID (System V Interface
+   Definition). */
+#define _SVID_SOURCE
+#define _BSD_SOURCE
+
+/* Under glibc-based systems we want all GNU extensions as well.  This
+   declares some unnecessary cruft, but also useful functions such as
+   timegm, FNM_CASEFOLD extension to fnmatch, memrchr, etc.  */
+#define _GNU_SOURCE
+
+#endif /* NAMESPACE_TWEAKS */
+
+
+/* Alloca declaration, based on recommendation in the Autoconf manual.
+   These have to be after the above namespace tweaks, but before any
+   non-preprocessor code.  */
+
+#if HAVE_ALLOCA_H
+# include <alloca.h>
+#elif defined WINDOWS
+# include <malloc.h>
+# ifndef alloca
+#  define alloca _alloca
+# endif
+#elif defined __GNUC__
+# define alloca __builtin_alloca
+#elif defined _AIX
+# define alloca __alloca
+#else
+# include <stddef.h>
+# ifdef  __cplusplus
+extern "C"
+# endif
+void *alloca (size_t);
+#endif
+
 /* Must include these, so we can test for the missing stat macros and
    define them as necessary.  */
 #include <sys/types.h>