1 dnl @synopsis AC_CXX_NAMESPACES
3 dnl If the compiler can prevent names clashes using namespaces, define
6 dnl @author Luc Maisonobe
8 AC_DEFUN([AC_CXX_NAMESPACES],
9 [AC_CACHE_CHECK(whether the compiler implements namespaces,
13 [AC_LANG_PROGRAM([[namespace Outer { namespace Inner { int i = 0; }}]], [[using namespace Outer::Inner; return i;]])],
14 [ac_cv_cxx_namespaces=yes],[ac_cv_cxx_namespaces=no])
17 if test "$ac_cv_cxx_namespaces" = yes; then
18 AC_DEFINE([HAVE_NAMESPACES],[1],[Define if the compiler implements namespaces])
24 dnl @author Luc Maisonobe
26 AC_DEFUN([AC_CXX_REQUIRE_STL],
27 [AC_CACHE_CHECK(whether the compiler supports Standard Template Library,
29 [AC_REQUIRE([AC_CXX_NAMESPACES])
32 [AC_LANG_PROGRAM([[#include <list>
34 #ifdef HAVE_NAMESPACES
36 #endif]], [[list<int> x; x.push_back(5); list<int>::iterator iter = x.begin(); if (iter != x.end()) ++iter; return 0;]])],
37 [ac_cv_cxx_have_stl=yes],[ac_cv_cxx_have_stl=no])
40 if test "x_$ac_cv_cxx_have_stl" != x_yes; then
41 AC_MSG_ERROR([C++ Standard Template Libary unsupported])
45 dnl Determine whether we have gcc of a particular version or later,
46 dnl based on major, minor, patchlevel versions and date.
47 dnl AC_HAVE_GCC_VERSION(MAJOR_VERSION, MINOR_VERSION, PATCH_LEVEL,
48 dnl SNAPSHOT_DATE [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
49 AC_DEFUN(AC_HAVE_GCC_VERSION,
50 [AC_CACHE_CHECK([gcc is at least version $1.$2.$3.$4],
51 ac_cv_gcc_version_$1_$2_$3_$4,
53 if test x$GCC = x ; then ac_cv_gcc_version_$1_$2_$3_$4=no
55 ac_gcc_date=`$CC -v 2>&1 | grep '^gcc version ' | sed 's/ (.*//; s/.* //'`
56 if test 0$ac_gcc_date -eq 0 ; then ac_gcc_date=0 ; fi
57 AC_EGREP_CPP(yes, [#define HAVE_GCC_VERSION(MAJOR, MINOR, MICRO, DATE) \
59 || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ > (MINOR)) \
60 || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ == (MINOR) \
61 && __GNUC_PATCHLEVEL__ > (MICRO)) \
62 || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ == (MINOR) \
63 && __GNUC_PATCHLEVEL__ == (MICRO) && ${ac_gcc_date}L >= (DATE)))
64 #if HAVE_GCC_VERSION($1,$2,$3,$4)
67 AC_DEFINE_UNQUOTED(HAVE_GCC_VERSION_$1_$2_$3_$4, 1,
68 [Define to 1 if we have gcc $1.$2.$3 ($4)])
69 ac_cv_gcc_version_$1_$2_$3_$4=yes ; $5,
70 ac_cv_gcc_version_$1_$2_$3_$4=no ; $6)