Question: How to build lzma as a static library

[baparham]

Do you have any documentation or advice on how I might rebuild lzma-native with node-gyp but as a static library?

It seems to me, at some basic digging, that I'd need to update "libraries: ['-llzma'] in the binding.gyp file to point to a full path to the lzma.a library, but I am having trouble determining where that might be.

Thanks for the help!

[baparham]

I may have jumped the gun, for some reason I didn't see the <(module_root_dir)/build/liblzma/build/lib/liblzma.a up in the lines above. However, I think that's not my problem, since running ldd lzma-native.node points to a few other libs that it must dynamically load, like libc and libstdc++. those are the libs I'm trying to link in statically I suppose.

[baparham]

I attempted to set "type": "static_library", in the lzma_native target section of binding.gyp, but this then resulted in another error:

  TOUCH Release/obj.target/liblzma.stamp
  CXX(target) Release/obj.target/lzma_native/src/util.o
  CXX(target) Release/obj.target/lzma_native/src/liblzma-functions.o
  CXX(target) Release/obj.target/lzma_native/src/filter-array.o
  CXX(target) Release/obj.target/lzma_native/src/lzma-stream.o
  CXX(target) Release/obj.target/lzma_native/src/module.o
  CXX(target) Release/obj.target/lzma_native/src/mt-options.o
  CXX(target) Release/obj.target/lzma_native/src/index-parser.o
../src/index-parser.cpp: In function 'lzma_ret lzma::my_lzma_parse_indexes_from_file(lzma::lzma_index_parser_data*)':
../src/index-parser.cpp:106:11: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
  lzma_ret ret;
           ^~~

I suspect this should be the right way to have node-gype build the library statically, but the compilation warning is a blocker. I'll continue debugging.

[addaleax]

@baparham Can I ask why the compilation warning is a blocker? In any case, if it is, then I’m not sure how to help with that particular problem (the code in question was lifted from the libzma library itself)

[baparham]

It seems to stop node-gyp from compiling. If I initialize lzma_ret = LZMA_OK on the failing line and then node gyp seems to get past that part and fails for another reason, i believe that there was no make target for Release/lzma_native.node (of the top of my head)

I've began to explore other ways of meeting my requirements without a statically compiled lzma, but I think this still would be nice to get figured out.

[addaleax]

@baparham Yeah, it’s a warning, not an error, it shouldn’t affect the compilation process.

If you can give me exact steps to reproduce what you’re running into, I’m happy to help, but I don’t think the information here is actionable right now.