Hi there! I'm trying to compile libjpeg to JavaScript for using it in a webapp. So far I've had no luck with getting it to work. What I've done:
1. I've set up emscripten with my Ubuntu 14.04 LTS, the simple "Hello world"-c-code compiled successfully to JavaScript. 2. I've downloaded/extracted http://www.ijg.org/files/jpegsrc.v9a.tar.gz. I've made sure that I can build the included programs like djpeg or cjpeg. 3. I've made some modifications to example.c (mainly adding a main-function) and created a makefile for compiling it with gcc. 4. I've made sure I can successfully run the natively compiled "example". 5. I called emcc for example.c with HTML-output, getting the following: warning: unresolved symbol: jpeg_read_header warning: unresolved symbol: jpeg_CreateDecompress warning: unresolved symbol: jpeg_start_decompress warning: unresolved symbol: jpeg_stdio_src warning: unresolved symbol: jpeg_std_error warning: unresolved symbol: jpeg_destroy_decompress warning: unresolved symbol: jpeg_finish_decompress warning: unresolved symbol: jpeg_read_scanlines 6. I've opened the generated HTML-output in a Firefox instance, but get file:///home/kopiske/emscripten/jpeg-components/jpeg-9a/example.data uncaught exception: abort(-1) at jsStackTrace@file:///home/kopiske/emscripten/jpeg-components/jpeg-9a/example.js:1316:13 stackTrace@file:///home/kopiske/emscripten/jpeg-components/jpeg-9a/example.js:1333:22 abort@file:///home/kopiske/emscripten/jpeg-components/jpeg-9a/example.js:10939:44 _jpeg_std_error@file:///home/kopiske/emscripten/jpeg-components/jpeg-9a/example.js:6541:59 _jpeg_std_error__wrapper@file:///home/kopiske/emscripten/jpeg-components/jpeg-9a/example.js:10637:59 dynCall_ii@file:///home/kopiske/emscripten/jpeg-components/jpeg-9a/example.js:10605:10 invoke_ii@file:///home/kopiske/emscripten/jpeg-components/jpeg-9a/example.js:6663:12 _read_JPEG_file@file:///home/kopiske/emscripten/jpeg-components/jpeg-9a/example.js:6902:11 _main@file:///home/kopiske/emscripten/jpeg-components/jpeg-9a/example.js:7091:8 asm._main@file:///home/kopiske/emscripten/jpeg-components/jpeg-9a/example.js:10676:8 callMain@file:///home/kopiske/emscripten/jpeg-components/jpeg-9a/example.js:10805:15 doRun@file:///home/kopiske/emscripten/jpeg-components/jpeg-9a/example.js:10863:42 run/<@file:///home/kopiske/emscripten/jpeg-components/jpeg-9a/example.js:10874:7 "pre-main prep time: 241 ms" example.html:1245 Module.printErr() example.html:1245 doRun() example.js:10858 run/<() example.js:10874 "missing function: jpeg_std_error" example.html:1245 Module.printErr() example.html:1245 _jpeg_std_error() example.js:6541 _jpeg_std_error__wrapper() example.js:10637 dynCall_ii() example.js:10605 invoke_ii() example.js:6663 _read_JPEG_file() example.js:6902 _main() example.js:7091 asm._main() example.js:10676 callMain() example.js:10805 doRun() example.js:10863 run/<() I haven't provided the modified example.c, since I get the same warnings mentioned in step 5 when I try to compile the unmodified "djpeg" with emcc. When I provide -s INCLUDE_FULL_LIBRARY=1 to emcc, the warnings disappear, but the error in 6 still remains. I have no idea why the used functions are not included. Any help with this is highly appreciated! (As you might have noticed, my knowledge of C is rudimentary to non-existent ;-)) Best regards, Björn -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
