I tried the instructions here with the latest version of Emscripten: https://github.com/kripken/gmp.js/blob/master/README.markdown
The .a file seems to be created correctly. Then I try to compile this library (in debug mode) and it seems to work:
emcc invocation: /home/marcosscriven/sources/emscripten/emcc -O0 --closure 0 test.c .libs/libgmp.a -o complete.js (Emscripten: Running sanity checks) emcc: compiling to bitcode emcc: compiling source file: test.c emcc running: /usr/local/bin/clang -m32 -U__i386__ -U__x86_64__ -U__i386 -U__x86_64 -Ui386 -Ux86_64 -U__SSE__ -U__SSE2__ -U__MMX__ -UX87_DOUBLE_ROUNDING -UHAVE_GCC_ASM_FOR_X87 -DEMSCRIPTEN -U__STRICT_ANSI__ -U__CYGWIN__ -D__STDC__ -Xclang -triple=i386-pc-linux-gnu -D__IEEE_LITTLE_ENDIAN -fno-math-errno -fno-ms-compatibility -nostdinc -Xclang -nobuiltininc -Xclang -nostdsysteminc -Xclang -isystem/home/marcosscriven/sources/emscripten/system/local/include -Xclang -isystem/home/marcosscriven/sources/emscripten/system/include -Xclang -isystem/home/marcosscriven/sources/emscripten/system/include/emscripten -Xclang -isystem/home/marcosscriven/sources/emscripten/system/include/bsd -Xclang -isystem/home/marcosscriven/sources/emscripten/system/include/libc -Xclang -isystem/home/marcosscriven/sources/emscripten/system/include/libcxx -Xclang -isystem/home/marcosscriven/sources/emscripten/system/lib/libcxxabi/include -Xclang -isystem/home/marcosscriven/sources/emscripten/system/include/gfx -Xclang -isystem/home/marcosscriven/sources/emscripten/system/include/net -Xclang -isystem/home/marcosscriven/sources/emscripten/system/include/SDL -U__APPLE__ -U__linux__ -D_LIBCPP_HAS_NO_DELETED_FUNCTIONS -emit-llvm -c test.c -o /tmp/tmp_pOV54/test_0.o emcc: copying library file: .libs/libgmp.a emcc: will generate JavaScript emcc: considering including libcxx: we need set([]) and have set([]) emcc: considering including libcxxabi: we need set([]) and have set([]) emcc: considering including libc: we need set(['realloc', 'malloc', 'memcpy', 'free']) and have set([]) emcc: including libc emcc: linking: ['/tmp/tmp_pOV54/test_0.o', '/tmp/tmp_pOV54/libgmp_1.a', '/home/marcosscriven/.emscripten_cache/libc.bc'] emcc: llvm-linking: ['/tmp/tmp_pOV54/test_0.o', '/home/marcosscriven/.emscripten_cache/libc.bc'] emcc: saving intermediate processing steps to /tmp/emscripten_temp emcc: LLVM opts: ['-internalize', '-internalize-public-api-list=main', '-globaldce'] emcc: step took 0.01 seconds emcc: step took 0.00 seconds emcc: LLVM => JS emscript: ll=>js emscript: scan took 0.000277042388916 seconds emscript: split took 0.000169038772583 seconds emscript: phase 1 took 0.173984050751 seconds emscript: phase 2 working on 1 chunks (intended chunk size: 1.00 MB, meta: 0.00 MB, forwarded: 0.01 MB, total: 0.01 MB) emscript: phase 2 took 0.206316947937 seconds emscript: phase 2b took 0.000115871429443 seconds emscript: phase 2c took 0.00135588645935 seconds emscript: phase 3 took 0.170216083527 seconds emcc: step took 0.60 seconds emcc: total time: 1.62 seconds
However, when I try to run the generated Javascript, I get this error:
marcosscriven@ubuntu-laptop :~/sources/gmp-5.0.2$ node complete.js /home/marcosscriven/sources/gmp-5.0.2/complete.js:2452 ___gmpz_init(((5242892)|0)); ^ TypeError: undefined is not a function at _pidigits (/home/marcosscriven/sources/gmp-5.0.2/complete.js:2452:7) at Object._main (/home/marcosscriven/sources/gmp-5.0.2/complete.js:2429:7) at Object.callMain (/home/marcosscriven/sources/gmp-5.0.2/complete.js:2644:24) at doRun (/home/marcosscriven/sources/gmp-5.0.2/complete.js:2679:20) at run (/home/marcosscriven/sources/gmp-5.0.2/complete.js:2703:12) at Object.<anonymous> (/home/marcosscriven/sources/gmp-5.0.2/complete.js:2725:13) at Module._compile (module.js:449:26) at Object.Module._extensions..js (module.js:467:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12)
Alon (creator of Emscripten), over Google’s Emscripten group of companies, says that this means that the function is not there, and check with llvm-vm, which apparently looks like this:
marcosscriven@ubuntu-laptop :~/sources/gmp-5.0.2$ !llvm-nm llvm-nm .libs/libgmp.a | grep gmpz_init 00000000 T __gmpz_init 00000000 T __gmpz_init2 U __gmpz_init 00000000 T __gmpz_inits 00000000 T __gmpz_init_set 00000000 T __gmpz_init_set_d 00000000 T __gmpz_init_set_si 00000000 T __gmpz_init_set_str 00000000 T __gmpz_init_set_ui U __gmpz_init U __gmpz_init_set_ui U __gmpz_init2 U __gmpz_init_set_ui U __gmpz_init U __gmpz_init_set_str U __gmpz_init U __gmpz_init2 U __gmpz_init_set U __gmpz_init U __gmpz_init_set
Therefore, I am completely at a loss!
It may be worth noting that compiling a test with a library when building using a regular compiler works fine.
EDIT: Next with this. In version 5.1.1 of this lib, they introduced a new configure option - "build-build", which performs general C compilation.
Now the problem is that during the test it never stops.
It is assumed that I will disable the LIKELY and UNLIKELY options in gmp.h:
https://github.com/kripken/gmp.js/blob/master/gmp-h.in
But I do not see how to "disable" them as such. Usually there is 0 or 1 option, but I do not see this here. I don’t even understand what this option is.
thanks
Marcos