do platform-specific checks after ensuring that the symbols we use are defined; extra...

[wxWidgets.git] / include / wx / build.h

diff --git a/include/wx/build.h b/include/wx/build.h
index 3d10bdfc533d204153eae908ad1918814e8bd790..5141afcbc7821748425ce10a5825b18c8061897e 100644 (file)
--- a/include/wx/build.h
+++ b/include/wx/build.h
@@ -1,11 +1,11 @@
 ///////////////////////////////////////////////////////////////////////////////
 // Name:        wx/build.h
-// Purpose:     wxBuildOptions class declaration
-// Author:      Vadim Zeitlin
+// Purpose:     Runtime build options checking
+// Author:      Vadim Zeitlin, Vaclav Slavik
 // Modified by:
 // Created:     07.05.02
 // RCS-ID:      $Id$
-// Copyright:   (c) 2002 Vadim Zeitlin <vadim@wxwindows.org>
+// Copyright:   (c) 2002 Vadim Zeitlin <vadim@wxwidgets.org>
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
@@ -14,44 +14,112 @@
 
 #include "wx/version.h"
 
-class WXDLLEXPORT wxAppConsole;
+// NB: This file contains macros for checking binary compatibility of libraries
+//     in multilib buildm, plugins and user components.
+//     The WX_BUILD_OPTIONS_SIGNATURE macro expands into string that should
+//     uniquely identify binary compatible builds: i.e. if two builds of the
+//     library are binary compatible, their signature string should be the
+//     same; if two builds are binary incompatible, their signatures should
+//     be different.
+//
+//     Therefore, wxUSE_XXX flags that affect binary compatibility (vtables,
+//     function signatures) should be accounted for here. So should compilers
+//     and compiler versions (but note that binary compatible compiler versions
+//     such as gcc-2.95.2 and gcc-2.95.3 should have same signature!).
 
 // ----------------------------------------------------------------------------
-// wxBuildOptions
+// WX_BUILD_OPTIONS_SIGNATURE
 // ----------------------------------------------------------------------------
 
-class wxBuildOptions
-{
-public:
-    // the ctor must be inline to get the compilation settings of the code
-    // which included this header
-    wxBuildOptions()
-    {
-        // debug/release
+#define __WX_BO_STRINGIZE(x)   __WX_BO_STRINGIZE0(x)
+#define __WX_BO_STRINGIZE0(x)  #x
+
+#if (wxMINOR_VERSION % 2) == 0
+    #define __WX_BO_VERSION(x,y,z) \
+        __WX_BO_STRINGIZE(x) "." __WX_BO_STRINGIZE(y)
+#else
+    #define __WX_BO_VERSION(x,y,z) \
+        __WX_BO_STRINGIZE(x) "." __WX_BO_STRINGIZE(y) "." __WX_BO_STRINGIZE(z)
+#endif
+
 #ifdef __WXDEBUG__
-        m_isDebug = TRUE;
+    #define __WX_BO_DEBUG "debug"
+#else
+    #define __WX_BO_DEBUG "no debug"
+#endif
+
+#if wxUSE_UNICODE
+    #define __WX_BO_UNICODE "Unicode"
+#else
+    #define __WX_BO_UNICODE "ANSI"
+#endif
+
+// GCC and Intel C++ share same C++ ABI (and possibly others in the future),
+// check if compiler versions are compatible:
+#if defined(__GXX_ABI_VERSION)
+    #define __WX_BO_COMPILER \
+            ",compiler with C++ ABI " __WX_BO_STRINGIZE(__GXX_ABI_VERSION)
+#elif defined(__INTEL_COMPILER)
+    #define __WX_BO_COMPILER ",Intel C++"
+#elif defined(__GNUG__)
+    #define __WX_BO_COMPILER ",GCC " \
+            __WX_BO_STRINGIZE(__GNUC__) "." __WX_BO_STRINGIZE(__GNUC_MINOR__)
+#elif defined(__VISUALC__)
+    #define __WX_BO_COMPILER ",Visual C++"
+#elif defined(__BORLANDC__)
+    #define __WX_BO_COMPILER ",Borland C++"
+#elif defined(__DIGITALMARS__)
+    #define __WX_BO_COMPILER ",DigitalMars"
+#elif defined(__WATCOMC__)
+    #define __WX_BO_COMPILER ",Watcom C++"
+#else
+    #define __WX_BO_COMPILER
+#endif
+
+// WXWIN_COMPATIBILITY macros affect presence of virtual functions
+#if WXWIN_COMPATIBILITY_2_6
+    #define __WX_BO_WXWIN_COMPAT_2_6 ",compatible with 2.6"
+#else
+    #define __WX_BO_WXWIN_COMPAT_2_6
+#endif
+#if WXWIN_COMPATIBILITY_2_8
+    #define __WX_BO_WXWIN_COMPAT_2_8 ",compatible with 2.8"
 #else
-        m_isDebug = FALSE;
+    #define __WX_BO_WXWIN_COMPAT_2_8
 #endif
 
-        // version: we don't test the micro version as hopefully changes
-        // between 2 micro versions don't result in fatal compatibility
-        // problems
-        m_verMaj = wxMAJOR_VERSION;
-        m_verMin = wxMINOR_VERSION;
-    }
+// deriving wxWin containers from STL ones changes them completely:
+#if wxUSE_STL
+    #define __WX_BO_STL ",STL containers"
+#else
+    #define __WX_BO_STL ",wx containers"
+#endif
 
-private:
-    // the version
-    int m_verMaj,
-        m_verMin;
+// This macro is passed as argument to wxConsoleApp::CheckBuildOptions()
+#define WX_BUILD_OPTIONS_SIGNATURE \
+    __WX_BO_VERSION(wxMAJOR_VERSION, wxMINOR_VERSION, wxRELEASE_NUMBER) \
+    " (" __WX_BO_DEBUG "," __WX_BO_UNICODE \
+     __WX_BO_COMPILER \
+     __WX_BO_STL \
+     __WX_BO_WXWIN_COMPAT_2_6 __WX_BO_WXWIN_COMPAT_2_8 \
+     ")"
 
-    // compiled with __WXDEBUG__?
-    bool m_isDebug;
 
-    // actually only CheckBuildOptions() should be our friend but well...
-    friend class wxAppConsole;
-};
+// ----------------------------------------------------------------------------
+// WX_CHECK_BUILD_OPTIONS
+// ----------------------------------------------------------------------------
 
-#endif // _WX_BUILD_H_
+// Use this macro to check build options. Adding it to a file in DLL will
+// ensure that the DLL checks build options in same way IMPLEMENT_APP() does.
+#define WX_CHECK_BUILD_OPTIONS(libName)                                 \
+    static struct wxBuildOptionsChecker                                 \
+    {                                                                   \
+        wxBuildOptionsChecker()                                         \
+        {                                                               \
+            wxAppConsole::CheckBuildOptions(WX_BUILD_OPTIONS_SIGNATURE, \
+                                            libName);                   \
+        }                                                               \
+    } gs_buildOptionsCheck;
 
+
+#endif // _WX_BUILD_H_