Substituted new configure test for types of accept()

Interfaced a lot of the custom tests to the config.cache, in the process
made them separate macros and grouped them out into files. Made naming
adjustments.

Removed a couple of useless/unused configure tests.

Disabled C++ by default. C++ is no more special than Perl, Python, and Tcl.
And it breaks equally often. :(

1 files changed, 67 insertions, 0 deletions

diff --git a/config/cxx.m4 b/config/cxx.m4
new file mode 100644
index 0000000000..db437ac287
--- /dev/null
+++ b/config/cxx.m4
@@ -0,0 +1,67 @@
+# Macros to detect certain C++ features
+# $Header: /cvsroot/pgsql/config/Attic/cxx.m4,v 1.1 2000/06/11 11:39:46 petere Exp $
+
+
+# PGAC_CLASS_STRING
+# -----------------
+# Look for class `string'. First look for the <string> header. If this
+# is found a <string> header then it's probably safe to assume that
+# class string exists.  If not, check to make sure that <string.h>
+# defines class `string'.
+AC_DEFUN([PGAC_CLASS_STRING],
+[AC_LANG_SAVE
+AC_LANG_CPLUSPLUS
+AC_CHECK_HEADER(string,
+  [AC_DEFINE(HAVE_CXX_STRING_HEADER)])
+
+if test x"$ac_cv_header_string" != xyes ; then
+  AC_CACHE_CHECK([for class string in <string.h>],
+    [pgac_cv_class_string_in_string_h],
+    [AC_TRY_COMPILE([#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+],
+      [string foo = "test"],
+      [pgac_cv_class_string_in_string_h=yes],
+      [pgac_cv_class_string_in_string_h=no])])
+
+  if test x"$pgac_cv_class_string_in_string_h" != xyes ; then
+    AC_MSG_ERROR([neither <string> nor <string.h> seem to define the C++ class \`string\'])
+  fi
+fi
+AC_LANG_RESTORE])# PGAC_CLASS_STRING
+
+
+# PGAC_CXX_NAMESPACE_STD
+# ----------------------
+# Check whether the C++ compiler understands `using namespace std'.
+#
+# Note 1: On at least some compilers, it will not work until you've
+# included a header that mentions namespace std. Thus, include the
+# usual suspects before trying it.
+#
+# Note 2: This test does not actually reveal whether the C++ compiler
+# properly understands namespaces in all generality. (GNU C++ 2.8.1
+# is one that doesn't.) However, we don't care.
+AC_DEFUN([PGAC_CXX_NAMESPACE_STD],
+[AC_REQUIRE([PGAC_CLASS_STRING])
+AC_CACHE_CHECK([for namespace std in C++],
+pgac_cv_cxx_namespace_std,
+[
+AC_LANG_SAVE
+AC_LANG_CPLUSPLUS
+AC_TRY_COMPILE(
+[#include <stdio.h>
+#include <stdlib.h>
+#ifdef HAVE_CXX_STRING_HEADER
+#include <string>
+#endif
+using namespace std;
+], [],
+[pgac_cv_cxx_namespace_std=yes],
+[pgac_cv_cxx_namespace_std=no])
+AC_LANG_RESTORE])
+
+if test $pgac_cv_cxx_namespace_std = yes ; then
+    AC_DEFINE(HAVE_NAMESPACE_STD, 1, [Define to 1 if the C++ compiler understands `using namespace std'])
+fi])# PGAC_CXX_NAMESPACE_STD