ssize_t is always defined in OSX

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

diff --git a/include/wx/build.h b/include/wx/build.h
index a9bf3923ab8f70d6b6f428d453dbb077fc23fa26..4cc0dca46d2146039866810b56eb6bcb22b70030 100644 (file)
--- a/include/wx/build.h
+++ b/include/wx/build.h
@@ -5,7 +5,7 @@
 // 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
 ///////////////////////////////////////////////////////////////////////////////
 
@@ -14,11 +14,25 @@
 
 #include "wx/version.h"
 
+// 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!).
+
 // ----------------------------------------------------------------------------
 // WX_BUILD_OPTIONS_SIGNATURE
 // ----------------------------------------------------------------------------
 
-#define __WX_BO_STRINGIZE(x)  #x
+#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) \
@@ -39,13 +53,61 @@
 #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_2
+    #define __WX_BO_WXWIN_COMPAT_2_2 ",compatible with 2.2"
+#else
+    #define __WX_BO_WXWIN_COMPAT_2_2
+#endif
+#if WXWIN_COMPATIBILITY_2_4
+    #define __WX_BO_WXWIN_COMPAT_2_4 ",compatible with 2.4"
+#else
+    #define __WX_BO_WXWIN_COMPAT_2_4
+#endif
+
+// 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
+
 // 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_DEBUG "," __WX_BO_UNICODE \
+     __WX_BO_COMPILER \
+     __WX_BO_STL \
+     __WX_BO_WXWIN_COMPAT_2_2 __WX_BO_WXWIN_COMPAT_2_4 \
+     ")"
 
 
+// ----------------------------------------------------------------------------
+// WX_CHECK_BUILD_OPTIONS
+// ----------------------------------------------------------------------------
 
 // 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.
@@ -58,4 +120,29 @@
     };                                                                  \
     static bool gs_buildOptionsCheck = wxCheckBuildOptions();
 
+
+#if WXWIN_COMPATIBILITY_2_4
+
+// ----------------------------------------------------------------------------
+// wxBuildOptions
+// ----------------------------------------------------------------------------
+
+// NB: Don't use this class in new code, it relies on the ctor being always
+//     inlined. WX_BUILD_OPTIONS_SIGNATURE always works.
+class wxBuildOptions
+{
+public:
+    // the ctor must be inline to get the compilation settings of the code
+    // which included this header
+    wxBuildOptions() : m_signature(WX_BUILD_OPTIONS_SIGNATURE) {}
+
+private:
+    const char *m_signature;
+
+    // actually only CheckBuildOptions() should be our friend but well...
+    friend class wxAppConsole;
+};
+
+#endif // WXWIN_COMPATIBILITY_2_4
+
 #endif // _WX_BUILD_H_