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| author | Bastien ROUCARIÈS <roucaries.bastien@gmail.com> | 2014-12-29 13:14:42 +0100 |
|---|---|---|
| committer | Bastien ROUCARIÈS <roucaries.bastien@gmail.com> | 2014-12-29 13:14:42 +0100 |
| commit | 44b360ab0acdfb256b198137fb905d68893a0400 (patch) | |
| tree | 55e1768c0b1cfaebdacad1cbaa9e8c08785c5cc7 /m4/ax_cxx_const_cast.m4 | |
| parent | 86c4a5204716eba81f652708d799359d9e6e5bd4 (diff) | |
| download | autoconf-archive-44b360ab0acdfb256b198137fb905d68893a0400.tar.gz | |
Modernize m4/ax_cxx_const_cast.m4
Diffstat (limited to 'm4/ax_cxx_const_cast.m4')
| -rw-r--r-- | m4/ax_cxx_const_cast.m4 | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/m4/ax_cxx_const_cast.m4 b/m4/ax_cxx_const_cast.m4 index 3029a10..4c6260f 100644 --- a/m4/ax_cxx_const_cast.m4 +++ b/m4/ax_cxx_const_cast.m4 @@ -20,19 +20,25 @@ # and this notice are preserved. This file is offered as-is, without any # warranty. -#serial 6 +#serial 7 AU_ALIAS([AC_CXX_CONST_CAST], [AX_CXX_CONST_CAST]) AC_DEFUN([AX_CXX_CONST_CAST], -[AC_CACHE_CHECK(whether the compiler supports const_cast<>, -ax_cv_cxx_const_cast, -[AC_LANG_SAVE - AC_LANG_CPLUSPLUS - AC_TRY_COMPILE(,[int x = 0;const int& y = x;int& z = const_cast<int&>(y);return z;], - ax_cv_cxx_const_cast=yes, ax_cv_cxx_const_cast=no) - AC_LANG_RESTORE -]) -if test "$ax_cv_cxx_const_cast" = yes; then - AC_DEFINE(HAVE_CONST_CAST,,[define if the compiler supports const_cast<>]) -fi +[dnl + AC_CACHE_CHECK([whether the compiler supports const_cast<>], + ax_cv_cxx_const_cast, + [dnl + AC_LANG_PUSH([C++]) + AC_COMPILE_IFELSE([dnl + AC_LANG_PROGRAM([], + [int x = 0; + const int& y = x; + int& z = const_cast<int&>(y); + return z;])], + ax_cv_cxx_const_cast=yes, + ax_cv_cxx_const_cast=no) + AC_LANG_POP([C++]) + ]) + AS_IF([test "X$ax_cv_cxx_const_cast" = Xyes], + [AC_DEFINE(HAVE_CONST_CAST,,[define if the compiler supports const_cast<>])]) ]) |