Hi Sathya
On 04/07/2014 03:14, Sathyanarayanan Gunasekaran wrote:
> Hey Mark!
>
>
> On Thu, Jul 3, 2014 at 12:09 AM, Mark Callow <[email protected]>
> wrote:
>> Still trying to use gsathya's SDL2 port.
>>
>>
>> On 02/07/2014 18:02, Mark Callow wrote:
>>
>> I will try copying to my emscripten 1.16 folder instead of explicitly
>> including it in the command.
>>
>> Had the same problem. Emscripten/Clang complained SDL wasn't a bit code
>> library.
>>
>> I have now added gsathya's fork of Emscripten to the remotes in my local
>> clone and checked out the "sdl" branch. I then set EMSCRIPTEN_ROOT to that
>> clone/branch and attempted to build. During the final link (i.e BC to JS
>> phase) I get
>>
>> 1> \Users\callow_mark\appdata\local\temp\tmpmhikec.c(28,10): fatal error :
>> 'SDL/SDL_rect.h' file not found
>> 1> #include "SDL/SDL_rect.h"
>> 1> ^
>> 1> 1 error generated.
>>
>> All the files passed to my emcc command are either .o or .bc. I have no idea
>> what tmpmhikec.c is. By the time the error appears, the temp file has been
>> deleted so I can't look at it. Since emcc is being called for linking the
>> command contains no -I options to specify include directories. For what is
>> worth, SDL_rect.h exists in both the SDL and SDL2 directories in
>> $EMSCRIPTEN_ROOT/system/include.
>>
>> How do I use this version of Emscripten?
> I haven't seen this error before.
>
> Here's a HOWTO on using sdl2 without changing anything in emscripten -
> * $ git clone https://github.com/gsathya/SDL-emscripten.git
> * $ cd SDL-emscripten
> * $ emconfigure ./configure --host=asmjs-unknown-emscripten
> --disable-assembly --disable-threads --enable-cpuinfo=false
> CFLAGS="-O2"
> * $ emmake make
>
> Now the SDL2 port would've been built in /path/to/SDL-emscripten/build/.libs
>
> You can include the headers by adding
> "-I/path/to/SDL-emscripten/include" and then including SDL itself by
> just adding the path to the built lib.
>
> So if previously your command was something like -
> $ emcc foo.c -o a.html
>
> it changes to
> $ emcc foo.c -I/path/to/SDL-emscripten/include
> /path/to/SDL-emscripten/build/.libs/libSDL2.a -o a.html
>
> I'm not entirely sure how all of this translates to VS, though. If
> anyone with VS experience can help, that'd be awesome!
I am trying to use your GitHub emscripten fork that contains the SDL2
libraries. I was hoping to avoid having to build SDL2 myself. I just
tried that and the emconfigure step is failing, as noted in another thread.
Is it necessary to add -lSDL2 to my link command? I was expecting that
since I was using your fork, emcc would automatically search the SDL2
libraries.
The error I am seeing is because it looks like some source is being
compiled during the link step when no -I is defined (and in VS cannot be
defined) so the SDL includes are not found. I have been unable to figure
out what file is being compiled from source.
Regards
-Mark
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