继续了解版本资源的使用（由wxWidgets构建monodll的make文件开始）

前两天初步研究了一下给工程文件添加版本信息的方法，今天在查阅其它资料的时候，又继续挖掘了一些内容，增强一下自己的理解。

在wxWidgets的make.gcc文件中有如下内容：

$(OBJS)\monodll_version_rc.o: ../../src/msw/version.rc$(WINDRES) -i$< -o$@    --define __WXMSW__ $(__WXUNIV_DEFINE_p_67) $(__DEBUG_DEFINE_p_66) $(__NDEBUG_DEFINE_p_65) $(__EXCEPTIONS_DEFINE_p_65) $(__RTTI_DEFINE_p_65) $(__THREAD_DEFINE_p_65) $(__UNICODE_DEFINE_p_67) $(__MSLU_DEFINE_p_65) --include-dir $(SETUPHDIR) --include-dir ../../include $(__CAIRO_INCLUDEDIR_p) --define WXBUILDING --define WXDLLNAME=wx$(PORTNAME)$(WXUNIVNAME)$(WX_RELEASE_NODOT)$(WXUNICODEFLAG)$(WXDEBUGFLAG)$(WX_LIB_FLAVOUR)$(WXCOMPILER)$(VENDORTAG)  --include-dir ../../src/tiff/libtiff --include-dir ../../src/jpeg --include-dir ../../src/png --include-dir ../../src/zlib --include-dir ../../src/regex --include-dir ../../src/expat/lib --include-dir ../../src/stc/scintilla/include --include-dir ../../src/stc/scintilla/lexlib --include-dir ../../src/stc/scintilla/src --define __WX__ --define SCI_LEXER --define LINK_LEXERS --define wxUSE_BASE=1 --define WXMAKINGDLL

其中有个定义是"--define WXDLLNAME=wx$(PORTNAME)$(WXUNIVNAME)$(WX_RELEASE_NODOT)$(WXUNICODEFLAG)$(WXDEBUGFLAG)$(WX_LIB_FLAVOUR)$(WXCOMPILER)$(VENDORTAG) "，再比对version.rc文件，终于明白了如何将make参数中的宏替换至资源文件的方法（以前从网上只言片语中看到，但那时候很不理解怎么回事）

version.rc 内容如下：

///////////////////////////////////////////////////////////////////////////////// Name:        src/msw/version.rc// Purpose:     contains version info resource for wxMSW DLL build// Author:      Vadim Zeitlin// Modified by:// Created:     09.07.00// Copyright:   (c) 2000 Vadim Zeitlin// Licence:     wxWindows licence///////////////////////////////////////////////////////////////////////////////#include "wx/version.h"// see http://msdn.microsoft.com/library/psdk/winui/rc_7x2d.htm for values: we// don't use symbolic constants because older compilers might not have them#ifdef WXMAKINGDLL    #define wxVFT 2 // VFT_DLL#else    #define wxVFT 1 // VFT_APP#endif#ifdef _DEBUG    #define DLL_FLAGS 0x1L#else    #define DLL_FLAGS 0x0L#endif// 0x0409 is US English, 0x04b0 is Unicode and 0x0000 is 7 bit ASCII. see// http://msdn.microsoft.com/en-us/library/aa381049(VS.85).aspx for the full// list of languages and charsets#define LANG 0x0409#ifdef _UNICODE    #define CHARSET 0x4b0    #define LANG_WITH_CHARSET "040904b0"#else    #define CHARSET 0    #define LANG_WITH_CHARSET "04090000"#endif#ifdef WXMAKINGDLL_BASE    #define WXLIBDESC "base"#elif defined WXMAKINGDLL_NET    #define WXLIBDESC "network"#elif defined WXMAKINGDLL_CORE    #define WXLIBDESC "core"#elif defined WXMAKINGDLL_ADV    #define WXLIBDESC "advanced"#elif defined WXMAKINGDLL_QA    #define WXLIBDESC "qa"#elif defined WXMAKINGDLL_HTML    #define WXLIBDESC "html"#elif defined WXMAKINGDLL_GL    #define WXLIBDESC "OpenGL"#elif defined WXMAKINGDLL_XML    #define WXLIBDESC "XML"#elif defined WXMAKINGDLL_XRC    #define WXLIBDESC "XRC"#elif defined WXMAKINGDLL_AUI    #define WXLIBDESC "AUI"#elif defined WXMAKINGDLL_RIBBON    #define WXLIBDESC "ribbon"#elif defined WXMAKINGDLL_PROPGRID    #define WXLIBDESC "property grid"#elif defined WXMAKINGDLL_RICHTEXT    #define WXLIBDESC "rich text"#elif defined WXMAKINGDLL_MEDIA    #define WXLIBDESC "multimedia"#elif defined WXMAKINGDLL_STC    #define WXLIBDESC "styled text"#elif defined WXMAKINGDLL_WEBVIEW    #define WXLIBDESC "webview"#elif defined WXMAKINGDLL    #define WXLIBDESC "monolithic"#else    #error "What are we building?"#endif1 VERSIONINFO FILEVERSION wxMAJOR_VERSION,wxMINOR_VERSION,wxRELEASE_NUMBER,wxSUBRELEASE_NUMBER PRODUCTVERSION wxMAJOR_VERSION,wxMINOR_VERSION,wxRELEASE_NUMBER,wxSUBRELEASE_NUMBER FILEFLAGSMASK 0x3fL FILEFLAGS DLL_FLAGS FILEOS 0x40004L // VOS_NT_WINDOWS32 FILETYPE wxVFT FILESUBTYPE 0x0LBEGIN    BLOCK "StringFileInfo"    BEGIN        BLOCK LANG_WITH_CHARSET        BEGIN            VALUE "Comments", "wxWidgets cross-platform GUI framework\0"            VALUE "CompanyName", "wxWidgets development team\0"            VALUE "FileDescription", "wxWidgets " WXLIBDESC " library\0"            VALUE "FileVersion", wxVERSION_NUM_DOT_STRING "\0"            VALUE "InternalName", wxSTRINGIZE(WXDLLNAME) "\0"            VALUE "LegalCopyright", "Copyright ?1993-2013 wxWidgets development team\0"            VALUE "OriginalFilename", wxSTRINGIZE(WXDLLNAME) ".dll\0"            VALUE "ProductName", "wxWidgets\0"            VALUE "ProductVersion", wxVERSION_NUM_DOT_STRING "\0"        END    END    BLOCK "VarFileInfo"    BEGIN            VALUE "Translation", LANG, CHARSET    ENDEND

看到这样的versioninfo的定义，结合#define中"##","#","@"妙用一文，才发觉宏定义真的太有意思了！

version.h片断：

/*  helpers for wxVERSION_NUM_XXX */#define wxMAKE_VERSION_STRING(x, y, z) \    wxSTRINGIZE(x) wxSTRINGIZE(y) wxSTRINGIZE(z)#define wxMAKE_VERSION_DOT_STRING(x, y, z) \    wxSTRINGIZE(x) "." wxSTRINGIZE(y) "." wxSTRINGIZE(z)#define wxMAKE_VERSION_STRING_T(x, y, z) \    wxSTRINGIZE_T(x) wxSTRINGIZE_T(y) wxSTRINGIZE_T(z)#define wxMAKE_VERSION_DOT_STRING_T(x, y, z) \    wxSTRINGIZE_T(x) wxT(".") wxSTRINGIZE_T(y) wxT(".") wxSTRINGIZE_T(z)/*  these are used by src/msw/version.rc and should always be ASCII, not Unicode */#define wxVERSION_NUM_STRING \  wxMAKE_VERSION_STRING(wxMAJOR_VERSION, wxMINOR_VERSION, wxRELEASE_NUMBER)#define wxVERSION_NUM_DOT_STRING \  wxMAKE_VERSION_DOT_STRING(wxMAJOR_VERSION, wxMINOR_VERSION, wxRELEASE_NUMBER)

在cpp.h中有wxSTRINGIZE宏定义：

/* wxSTRINGIZE works as the preprocessor # operator but also works with macros */#define wxSTRINGIZE_HELPER(x)       #x#define wxSTRINGIZE(x)              wxSTRINGIZE_HELPER(x)

上图，看看wxWidgets的版本信息