mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-12-03 08:00:21 +08:00
06cd0f1a32
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. :(
68 lines
2.1 KiB
Plaintext
68 lines
2.1 KiB
Plaintext
# 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
|