如何使id3lib在C ++ Builder 10.2中工作？

Question

How to install this library in C++ Builder 10.2 on Windows 7? I copied id3lib.dll from "id3lib-3.8.3 win binaries/debug" and put in folder with my project .exe file, than I created id3lib.lib by ImpLib (with using -a option) and added to my project. After that I linked header folder (id3) to my project and wrote #include "id3/tag.h" . When I'm trying to compile, I get:

[bcc32 Fatal Error] globals.h(56): F1003 Error directive: read message above or win32.readme.first.txt

What am I doing wrong to install this library?

Answer 1

There is an #error directive on line 56 of globals.h :

#ifdef WIN32
#  define LINKOPTION_STATIC         1 //both for use and creation of static lib
#  define LINKOPTION_CREATE_DYNAMIC 2 //should only be used by prj/id3lib.dsp
#  define LINKOPTION_USE_DYNAMIC    3 //if your project links id3lib dynamic
#  ifndef ID3LIB_LINKOPTION
#    pragma message("*** NOTICE *** (not a real error)")
#    pragma message("* You should include a define in your project which reflect how you link the library")
#    pragma message("* If you use id3lib.lib or libprj/id3lib.dsp (you link static) you should add")
#    pragma message("* ID3LIB_LINKOPTION=1 to your preprocessor definitions of your project.")
#    pragma message("* If you use id3lib.dll (you link dynamic) you should add ID3LIB_LINKOPTION=3")
#    pragma message("* to your preprocessor definitions of your project.")
#    pragma message("***")
#    error read message above or win32.readme.first.txt // <-- HERE

The compiler reaches the #error if WIN32 is defined but ID3LIB_LINKOPTION is NOT defined.

As you can see in the "message above", you need to manually define ID3LIB_LINKOPTION in your project according to how you are linking to the ID3 library. You have not done that yet, which is why you are getting the error.

Go into your Project Options and add an entry for ID3LIB_LINKOPTION=3 (since you are using the DLL version of the ID3 library) in the Conditionals section. Or, put a #define ID3LIB_LINKOPTION 3 statement in your C++ code above any #include statements for ID3 header files.

Also, make sure you add your generated id3lib.lib file to your project using the Project Manager, or put a #pragma comment(lib, "id3lib.lib") directive somewhere in your C++ code.