Initial check-in.

[shibboleth/cpp-opensaml.git] / acinclude.m4

diff --git a/acinclude.m4 b/acinclude.m4
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+dnl @synopsis AC_CXX_NAMESPACES\r
+dnl\r
+dnl If the compiler can prevent names clashes using namespaces, define\r
+dnl HAVE_NAMESPACES.\r
+dnl\r
+dnl @author Luc Maisonobe\r
+dnl\r
+AC_DEFUN([AC_CXX_NAMESPACES],\r
+[AC_CACHE_CHECK(whether the compiler implements namespaces,\r
+ac_cv_cxx_namespaces,\r
+[AC_LANG_SAVE\r
+ AC_LANG_CPLUSPLUS\r
+ AC_TRY_COMPILE([namespace Outer { namespace Inner { int i = 0; }}],\r
+                [using namespace Outer::Inner; return i;],\r
+ ac_cv_cxx_namespaces=yes, ac_cv_cxx_namespaces=no)\r
+ AC_LANG_RESTORE\r
+])\r
+if test "$ac_cv_cxx_namespaces" = yes; then\r
+  AC_DEFINE(HAVE_NAMESPACES,1,[define if the compiler implements namespaces])\r
+fi\r
+])\r
+\r
+\r
+dnl\r
+dnl @author Luc Maisonobe\r
+dnl\r
+AC_DEFUN([AC_CXX_REQUIRE_STL],\r
+[AC_CACHE_CHECK(whether the compiler supports Standard Template Library,\r
+ac_cv_cxx_have_stl,\r
+[AC_REQUIRE([AC_CXX_NAMESPACES])\r
+ AC_LANG_SAVE\r
+ AC_LANG_CPLUSPLUS\r
+ AC_TRY_COMPILE([#include <list>\r
+#include <deque>\r
+#ifdef HAVE_NAMESPACES\r
+using namespace std;\r
+#endif],[list<int> x; x.push_back(5);\r
+list<int>::iterator iter = x.begin(); if (iter != x.end()) ++iter; return 0;],\r
+ ac_cv_cxx_have_stl=yes, ac_cv_cxx_have_stl=no)\r
+ AC_LANG_RESTORE\r
+])\r
+if test "x_$ac_cv_cxx_have_stl" != x_yes; then\r
+  AC_MSG_ERROR([C++ Standard Template Libary unsupported])\r
+fi\r
+])\r
+\r
+dnl Determine whether we have gcc of a particular version or later,\r
+dnl based on major, minor, patchlevel versions and date.\r
+dnl AC_HAVE_GCC_VERSION(MAJOR_VERSION, MINOR_VERSION, PATCH_LEVEL, \r
+dnl    SNAPSHOT_DATE [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])\r
+AC_DEFUN(AC_HAVE_GCC_VERSION,\r
+[AC_CACHE_CHECK([gcc is at least version $1.$2.$3.$4],\r
+          ac_cv_gcc_version_$1_$2_$3_$4,\r
+[\r
+  if test x$GCC = x ; then ac_cv_gcc_version_$1_$2_$3_$4=no\r
+  else \r
+    ac_gcc_date=`$CC -v 2>&1 | grep '^gcc version ' | sed 's/ (.*//; s/.* //'`\r
+    if test 0$ac_gcc_date -eq 0 ; then ac_gcc_date=0 ; fi\r
+    AC_EGREP_CPP(yes, [#define HAVE_GCC_VERSION(MAJOR, MINOR, MICRO, DATE) \\r
+    (__GNUC__ > (MAJOR) \\r
+     || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ > (MINOR)) \\r
+     || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ == (MINOR) \\r
+         && __GNUC_PATCHLEVEL__ > (MICRO)) \\r
+     || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ == (MINOR) \\r
+         && __GNUC_PATCHLEVEL__ == (MICRO) && ${ac_gcc_date}L >= (DATE)))\r
+#if HAVE_GCC_VERSION($1,$2,$3,$4)\r
+yes\r
+#endif],\r
+   AC_DEFINE_UNQUOTED(HAVE_GCC_VERSION_$1_$2_$3_$4, 1,\r
+     [Define to 1 if we have gcc $1.$2.$3 ($4)])\r
+   ac_cv_gcc_version_$1_$2_$3_$4=yes ; $5,\r
+   ac_cv_gcc_version_$1_$2_$3_$4=no ; $6)\r
+fi\r
+])])dnl\r