LinkAllSymbols
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Force link all static lib symbols into .exe target, for full code coverage measure on windows.
When linking a static library against an executable, unreferenced symbols are normally discarded. Under Unix where we use gcc, we can pass the flag --whole-archive to the linker ld, which makes ld not discard any objects.
When under Windows Visual Studio, there is no equivalent to GNU ld option --whole-archive. The linker option /OPT:NOREF also doesn't work.
There are two ways to force link specify symbols from static library。
- Linker Option use /INCLUDE xxx
- Add code : #pragma comment(linker, "/include:xxx")
Use #pragma is more flexible. So we can use dumpbin tool to list all symbols, then generate Header File use #pragma comment(linker, "/inculde:xxx") to inlude all symbols.
Make sure dumpbin.exe be executed in Developer Command Prompt
Or write a batch command file, with the code(if installed Visual Studio 2013):
@echo off
if defined VS120COMNTOOLS (
call "%VS120COMNTOOLS%\vsvars32.bat")
The main GenSymbolsHeader.py execute dumpbin.exe, use regex expression to match all symbols, then generate Header File.
To automated generate LinkAllSymbols.h, in static library Post-Build Event, add this:
python ..\GenSymbolsHeader.py $(OutDir)$(TargetName)$(TargetExt) ..\Include\LinkAllSymbols.h
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