I am on Day 17.
These are the contents of my build.bat:
When trying to run it I receive a bunch of LNK2019 erros such as this one:
win32_game.obj : error LNK2019: ссылка на неразрешенный внешний символ __imp_StretchDIBits в функции "void __cdecl Win32DisplayBufferInWin
However this compiles just fine:
Yes, I checked if compiler flags were in effect.
I also tried moving -subsystem:windows,5.2 and -opt:ref ouside %CmnLinkerFlags% to see if that would help. It seems that linker just doesn't see any libraries inside of a variable.
I would really like to know what is going on here and whether there is a workaround.
These are the contents of my build.bat:
1 2 3 4 5 6 7 | @echo off set CmnCompileFlags = -MT -Gm- -nologo -GR- -EHsc -EHa- -Oi -W4 -wd4201 -wd4100 -FC -Zi -Fmwin32_game.map set CmnLinkerFlags = -subsystem:windows,5.2 -opt:ref user32.lib Gdi32.lib Ole32.lib IF NOT EXIST ..\build mkdir ..\build pushd ..\build cl %CmnCompileFlags% ..\code\win32_game.cpp /link %CmnLinkerFlags% popd |
When trying to run it I receive a bunch of LNK2019 erros such as this one:
win32_game.obj : error LNK2019: ссылка на неразрешенный внешний символ __imp_StretchDIBits в функции "void __cdecl Win32DisplayBufferInWin
However this compiles just fine:
1 2 3 4 5 6 7 | @echo off set CmnCompileFlags = -MT -Gm- -nologo -GR- -EHsc -EHa- -Oi -W4 -wd4201 -wd4100 -FC -Zi -Fmwin32_game.map set CmnLinkerFlags = -subsystem:windows,5.2 -opt:ref user32.lib Gdi32.lib Ole32.lib IF NOT EXIST ..\build mkdir ..\build pushd ..\build cl %CmnCompileFlags% ..\code\win32_game.cpp /link -subsystem:windows,5.2 -opt:ref user32.lib Gdi32.lib Ole32.lib popd |
Yes, I checked if compiler flags were in effect.
I also tried moving -subsystem:windows,5.2 and -opt:ref ouside %CmnLinkerFlags% to see if that would help. It seems that linker just doesn't see any libraries inside of a variable.
I would really like to know what is going on here and whether there is a workaround.
Edited by Lichinka
on
Reason: Initial post
The problem is that you setting environment variables with set CmnCompileFlags = xxx syntax. This actually sets CmnCompileFlags(space) environment variable.
So if you want to use it like that, you need to add space when using it with % symbols: %CmnCompileFlags % (notice space before closing % symbol. Or you can do set CmnCompileFlags=xxx without any spaces around = symbol.
You can check this easily by adding following lines to your .bat file:
Same thing with CmnLinkerFlags variable.
So if you want to use it like that, you need to add space when using it with % symbols: %CmnCompileFlags % (notice space before closing % symbol. Or you can do set CmnCompileFlags=xxx without any spaces around = symbol.
You can check this easily by adding following lines to your .bat file:
1 2 | echo CmnCompileFlags without space = %CmnCompileFlags% echo CmnCompileFlags WITH space = %CmnCompileFlags % |
Same thing with CmnLinkerFlags variable.
Edited by Mārtiņš Možeiko
on
mmozeiko
So if you want to use it like that, you need to add space when using it with % symbols: %CmnCompileFlags %
Thanks, this solved the issue. Any ideas why CmnCompileFlags worked just fine? Cmd output for illustration:
1 2 3 4 | CmnCompileFlags without space = -MT -Gm- -nologo -GR- -EHsc -EHa- -Oi -W4 -wd4201 -wd4100 -FC -Zi -Fmwin32_game.map CmnCompileFlags WITH space = -MT -Gm- -nologo -GR- -EHsc -EHa- -Oi -W4 -wd4201 -wd4100 -FC -Zi -Fmwin32_game.map CmnLinkerFlags without space = CmnLinkerFlags WITH space = -subsystem:windows,5.2 -opt:ref user32.lib Gdi32.lib Ole32.lib |
Edit: I did a little bit more fidgeting with the bat file, and I can't reproduce this behaviour anymore. At this point I do need to add an extra space into %CmnCompileFlags % for it to work. I am not sure what change in particular caused it, but I do not think it is worth your attention to investigate what was probably user error on my part.
Edited by Lichinka
on