Issue #4753: By enabling a configure option named '--with-computed-gotos'
on compilers that support it (notably: gcc, SunPro, icc), the bytecode
evaluation loop is compiled with a new dispatch mechanism which gives
speedups of up to 20%, depending on the system, on various benchmarks.
diff --git a/pyconfig.h.in b/pyconfig.h.in
index 383c587..60dba85 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -5,6 +5,9 @@
#define Py_PYCONFIG_H
+/* Define if building universal (internal helper macro) */
+#undef AC_APPLE_UNIVERSAL_BUILD
+
/* Define for AIX if your compiler is a genuine IBM xlC/xlC_r and you want
support for AIX C++ shared extension modules. */
#undef AIX_GENUINE_CPLUSPLUS
@@ -949,6 +952,31 @@
/* Define to 1 if your <sys/time.h> declares `struct tm'. */
#undef TM_IN_SYS_TIME
+/* Define if you want to use computed gotos in ceval.c. */
+#undef USE_COMPUTED_GOTOS
+
+/* Enable extensions on AIX 3, Interix. */
+#ifndef _ALL_SOURCE
+# undef _ALL_SOURCE
+#endif
+/* Enable GNU extensions on systems that have them. */
+#ifndef _GNU_SOURCE
+# undef _GNU_SOURCE
+#endif
+/* Enable threading extensions on Solaris. */
+#ifndef _POSIX_PTHREAD_SEMANTICS
+# undef _POSIX_PTHREAD_SEMANTICS
+#endif
+/* Enable extensions on HP NonStop. */
+#ifndef _TANDEM_SOURCE
+# undef _TANDEM_SOURCE
+#endif
+/* Enable general extensions on Solaris. */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
+
+
/* Define if a va_list is an array of some kind */
#undef VA_LIST_IS_ARRAY
@@ -986,20 +1014,21 @@
/* Define to profile with the Pentium timestamp counter */
#undef WITH_TSC
-/* Define to 1 if your processor stores words with the most significant byte
- first (like Motorola and SPARC, unlike Intel and VAX). */
-#undef WORDS_BIGENDIAN
+/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
+ significant byte first (like Motorola and SPARC, unlike Intel). */
+#if defined AC_APPLE_UNIVERSAL_BUILD
+# if defined __BIG_ENDIAN__
+# define WORDS_BIGENDIAN 1
+# endif
+#else
+# ifndef WORDS_BIGENDIAN
+# undef WORDS_BIGENDIAN
+# endif
+#endif
/* Define if arithmetic is subject to x87-style double rounding issue */
#undef X87_DOUBLE_ROUNDING
-/* Define to 1 if on AIX 3.
- System headers sometimes define this.
- We just want to avoid a redefinition error message. */
-#ifndef _ALL_SOURCE
-# undef _ALL_SOURCE
-#endif
-
/* Define on OpenBSD to activate all library features */
#undef _BSD_SOURCE
@@ -1018,15 +1047,25 @@
/* This must be defined on some systems to enable large file support. */
#undef _LARGEFILE_SOURCE
+/* Define to 1 if on MINIX. */
+#undef _MINIX
+
/* Define on NetBSD to activate all library features */
#undef _NETBSD_SOURCE
/* Define _OSF_SOURCE to get the makedev macro. */
#undef _OSF_SOURCE
+/* Define to 2 if the system does not provide POSIX.1 features except with
+ this defined. */
+#undef _POSIX_1_SOURCE
+
/* Define to activate features from IEEE Stds 1003.1-2001 */
#undef _POSIX_C_SOURCE
+/* Define to 1 if you need to in order for `stat' and other things to work. */
+#undef _POSIX_SOURCE
+
/* Define if you have POSIX threads, and your system does not define that. */
#undef _POSIX_THREADS