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,
11 [AC_DIAGNOSE([obsolete],[Instead of using `AC_LANG', `AC_LANG_SAVE', and `AC_LANG_RESTORE',
12 you should use `AC_LANG_PUSH' and `AC_LANG_POP'.])dnl
15 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[namespace Outer { namespace Inner { int i = 0; }}]], [[using namespace Outer::Inner; return i;]])],[ac_cv_cxx_namespaces=yes],[ac_cv_cxx_namespaces=no])
18 if test "$ac_cv_cxx_namespaces" = yes; then
19 AC_DEFINE(HAVE_NAMESPACES,1,[define if the compiler implements namespaces])
25 dnl @author Luc Maisonobe
27 AC_DEFUN([AC_CXX_REQUIRE_STL],
28 [AC_CACHE_CHECK(whether the compiler supports Standard Template Library,
30 [AC_REQUIRE([AC_CXX_NAMESPACES])
31 AC_DIAGNOSE([obsolete],[Instead of using `AC_LANG', `AC_LANG_SAVE', and `AC_LANG_RESTORE',
32 you should use `AC_LANG_PUSH' and `AC_LANG_POP'.])dnl
35 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <list>
37 #ifdef HAVE_NAMESPACES
39 #endif]], [[list<int> x; x.push_back(5);
40 list<int>::iterator iter = x.begin(); if (iter != x.end()) ++iter; return 0;]])],[ac_cv_cxx_have_stl=yes],[ac_cv_cxx_have_stl=no])
43 if test "x_$ac_cv_cxx_have_stl" != x_yes; then
44 AC_MSG_ERROR([C++ Standard Template Libary unsupported])
48 dnl Determine whether we have gcc of a particular version or later,
49 dnl based on major, minor, patchlevel versions and date.
50 dnl AC_HAVE_GCC_VERSION(MAJOR_VERSION, MINOR_VERSION, PATCH_LEVEL,
51 dnl SNAPSHOT_DATE [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
52 AC_DEFUN(AC_HAVE_GCC_VERSION,
53 [AC_CACHE_CHECK([gcc is at least version $1.$2.$3.$4],
54 ac_cv_gcc_version_$1_$2_$3_$4,
56 if test x$GCC = x ; then ac_cv_gcc_version_$1_$2_$3_$4=no
58 ac_gcc_date=`$CC -v 2>&1 | grep '^gcc version ' | sed 's/ (.*//; s/.* //'`
59 if test 0$ac_gcc_date -eq 0 ; then ac_gcc_date=0 ; fi
60 AC_EGREP_CPP(yes, [#define HAVE_GCC_VERSION(MAJOR, MINOR, MICRO, DATE) \
62 || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ > (MINOR)) \
63 || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ == (MINOR) \
64 && __GNUC_PATCHLEVEL__ > (MICRO)) \
65 || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ == (MINOR) \
66 && __GNUC_PATCHLEVEL__ == (MICRO) && ${ac_gcc_date}L >= (DATE)))
67 #if HAVE_GCC_VERSION($1,$2,$3,$4)
70 AC_DEFINE_UNQUOTED(HAVE_GCC_VERSION_$1_$2_$3_$4, 1,
71 [Define to 1 if we have gcc $1.$2.$3 ($4)])
72 ac_cv_gcc_version_$1_$2_$3_$4=yes ; $5,
73 ac_cv_gcc_version_$1_$2_$3_$4=no ; $6)