wxEmptyString decorations.

[wxWidgets.git] / acinclude.m4

diff --git a/acinclude.m4 b/acinclude.m4
index beffd8ff0dd1c7b605f2c1dd850c3a94313f7f7c..6269f806f4807de5cefca2f179aef4a6238e7470 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -88,14 +88,11 @@ dnl WX_CPP_NEW_HEADERS checks whether the compiler has "new" <iostream> header
 dnl or only the old <iostream.h> one - it may be generally assumed that if
 dnl <iostream> exists, the other "new" headers (without .h) exist too.
 dnl
-dnl call WX_CPP_NEW_HEADERS(actiof-if-true, action-if-false-or-cross-compiling)
+dnl call WX_CPP_NEW_HEADERS(actiof-if-true, action-if-false)
 dnl ---------------------------------------------------------------------------
 
 AC_DEFUN([WX_CPP_NEW_HEADERS],
 [
-  if test "$cross_compiling" = "yes"; then
-    ifelse([$2], , :, [$2])
-  else
     AC_LANG_SAVE
     AC_LANG_CPLUSPLUS
 
@@ -108,7 +105,6 @@ AC_DEFUN([WX_CPP_NEW_HEADERS],
     fi
 
     AC_LANG_RESTORE
-  fi
 ])
 
 dnl ---------------------------------------------------------------------------
@@ -397,15 +393,17 @@ AC_DEFUN([WX_VERSIONED_SYMBOLS],
 [
   found_versioning=no
 
-  dnl Check for known non-gcc cases:
-  case "${host}" in
-    *-*-solaris2* )
-      if test "x$GCC" != "xyes" ; then
-          LDFLAGS_VERSIONING="-M $1"
-          found_versioning=yes
-      fi
-    ;;
-  esac
+  dnl FIXME - doesn't work, Solaris linker doesn't accept wildcards
+  dnl         in the script.
+  dnl dnl Check for known non-gcc cases:
+  dnl case "${host}" in
+  dnl   *-*-solaris2* )
+  dnl     if test "x$GCC" != "xyes" ; then
+  dnl         LDFLAGS_VERSIONING="-M $1"
+  dnl         found_versioning=yes
+  dnl     fi
+  dnl   ;;
+  dnl esac
   
   dnl Generic check for GCC or GCC-like behaviour (Intel C++, GCC):
   if test $found_versioning = no ; then
@@ -578,3 +576,61 @@ if test "$enable_largefile" != no; then
     AC_MSG_RESULT($wx_largefile)
 fi
 ])
+
+
+dnl Available from the GNU Autoconf Macro Archive at:
+dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_const_cast.html
+dnl
+AC_DEFUN([AC_CXX_CONST_CAST],
+[AC_CACHE_CHECK(whether the compiler supports const_cast<>,
+ac_cv_cxx_const_cast,
+[AC_LANG_SAVE
+ AC_LANG_CPLUSPLUS
+ AC_TRY_COMPILE(,[int x = 0;const int& y = x;int& z = const_cast<int&>(y);return z;],
+ ac_cv_cxx_const_cast=yes, ac_cv_cxx_const_cast=no)
+ AC_LANG_RESTORE
+])
+if test "$ac_cv_cxx_const_cast" = yes; then
+  AC_DEFINE(HAVE_CONST_CAST,,[define if the compiler supports const_cast<>])
+fi
+])
+
+dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_reinterpret_cast.html
+AC_DEFUN([AC_CXX_REINTERPRET_CAST],
+[AC_CACHE_CHECK(whether the compiler supports reinterpret_cast<>,
+ac_cv_cxx_reinterpret_cast,
+[AC_LANG_SAVE
+ AC_LANG_CPLUSPLUS
+ AC_TRY_COMPILE([#include <typeinfo>
+class Base { public : Base () {} virtual void f () = 0;};
+class Derived : public Base { public : Derived () {} virtual void f () {} };
+class Unrelated { public : Unrelated () {} };
+int g (Unrelated&) { return 0; }],[
+Derived d;Base& b=d;Unrelated& e=reinterpret_cast<Unrelated&>(b);return g(e);],
+ ac_cv_cxx_reinterpret_cast=yes, ac_cv_cxx_reinterpret_cast=no)
+ AC_LANG_RESTORE
+])
+if test "$ac_cv_cxx_reinterpret_cast" = yes; then
+  AC_DEFINE(HAVE_REINTERPRET_CAST,,
+            [define if the compiler supports reinterpret_cast<>])
+fi
+])
+
+dnl and http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_static_cast.html
+AC_DEFUN([AC_CXX_STATIC_CAST],
+[AC_CACHE_CHECK(whether the compiler supports static_cast<>,
+ac_cv_cxx_static_cast,
+[AC_LANG_SAVE
+ AC_LANG_CPLUSPLUS
+ AC_TRY_COMPILE([#include <typeinfo>
+class Base { public : Base () {} virtual void f () = 0; };
+class Derived : public Base { public : Derived () {} virtual void f () {} };
+int g (Derived&) { return 0; }],[
+Derived d; Base& b = d; Derived& s = static_cast<Derived&> (b); return g (s);],
+ ac_cv_cxx_static_cast=yes, ac_cv_cxx_static_cast=no)
+ AC_LANG_RESTORE
+])
+if test "$ac_cv_cxx_static_cast" = yes; then
+  AC_DEFINE(HAVE_STATIC_CAST,, [define if the compiler supports static_cast<>])
+fi
+])