+/* Feature test macros
+ *
+ * All of the feature test macros come in the following forms
+ * _PDCLIB_*_MIN(min): Available in versions > min
+ * _PDCLIB_*_MINMAX(min, max): Available in versions > min < max
+ * _PDCLIB_*_MAX(max): Availabel in versions < max
+ *
+ * The defined tests are:
+ * C: C standard versions
+ * 1990, 1995, 1999, 2011
+ * CXX: C++ standard versions
+ * 1997, 2011
+ * POSIX: POSIX extension versions.
+ * 1 (POSIX.2), 2 (POSIX.2), 199309L (POSIX.1b),
+ * 199506L (POSIX.1c), 200112L (2001), 200809L (2008)
+ * XOPEN: X/Open System Interface (XSI)/Single Unix Specification
+ * 0 (XPG4), 500 (SUSv2/UNIX98), 600 (SUSv3/UNIX03), 700 (SUSv4)
+ *
+ * PDCLib does not attempt or claim POSIX comformance, but makes available these
+ * extensions as
+ * (a) useful, and
+ * (b)
+ */
+#define _PDCLIB_C_MIN(min) _PDCLIB_C_MINMAX(min, 3000)
+#define _PDCLIB_CXX_MIN(min) _PDCLIB_CXX_MINMAX(min, 3000)
+#define _PDCLIB_XOPEN_MIN(min) _PDCLIB_XOPEN_MINMAX(min, 30000000)
+#define _PDCLIB_POSIX_MIN(min) _PDCLIB_POSIX_MINMAX(min, 30000000)
+#define _PDCLIB_C_MAX(max) _PDCLIB_C_MINMAX(0, max)
+#define _PDCLIB_CXX_MAX(max) _PDCLIB_CXX_MINMAX(0, max)
+#define _PDCLIB_XOPEN_MAX(max) _PDCLIB_XOPEN_MINMAX(0, max)
+#define _PDCLIB_POSIX_MAX(max) _PDCLIB_POSIX_MINMAX(0, max)
+#if defined(_PDCLIB_EXTENSIONS) || defined(_PDCLIB_BUILD)
+ #define _PDCLIB_C_MINMAX(min, max) 1
+ #define _PDCLIB_CXX_MINMAX(min, max) 1
+ #define _PDCLIB_POSIX_MINMAX(min, max) 1
+ #define _PDCLIB_XOPEN_MINMAX(min, max) 1
+#else
+ #define _PDCLIB_C_MINMAX(min, max) \
+ (_PDCLIB_C_VERSION >= (min) && _PDCLIB_C_VERSION <= (max))
+ #define _PDCLIB_CXX_MINMAX(min, max) \
+ (_PDCLIB_CXX_VERSION >= (min) && _PDCLIB_CXX_VERSION <= (max))
+ #define _PDCLIB_XOPEN_MINMAX(min, max) \
+ (defined(_XOPEN_SOURCE) \
+ && _XOPEN_SOURCE >= (min) && _XOPEN_SOURCE <= (max))
+ #define _PDCLIB_POSIX_MINMAX(min, max) \
+ (defined(_POSIX_C_SOURCE) \
+ && _POSIX_C_SOURCE >= (min) && _POSIX_C_SOURCE <= (max))
+
+ #if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE-1 == -1)
+ /* If _XOPEN_SOURCE is defined as empty, redefine here as zero */
+ #undef _XOPEN_SOURCE
+ #define _XOPEN_SOURCE 0
+ #endif
+
+ #if _PDCLIB_XOPEN_MIN(700) && !_PDCLIB_POSIX_MIN(200809L)
+ #undef _POSIX_C_SOURCE
+ #define _POSIX_C_SOURCE 2008098L
+ #elif _PDCLIB_XOPEN_MIN(600) && !_PDCLIB_POSIX_MIN(200112L)
+ #undef _POSIX_C_SOURCE
+ #define _POSIX_C_SOURCE 200112L
+ #elif _PDCLIB_XOPEN_MIN(0) && !_PDCLIB_POSIX_MIN(2)
+ #undef _POSIX_C_SOURCE
+ #define _POSIX_C_SOURCE 2
+ #endif
+
+ #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
+ #define _POSIX_C_SOURCE 1
+ #endif
+#endif
+
+#endif
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