gh-136976: Emscripten: Add _decimal and libmpdec #136997
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hoodmane
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hoodmane
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Jul 22, 2025
Goes together with: python/cpython#136997
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We'll have to merge python/buildmaster-config#615 before the buildbot will actually use this. |
freakboy3742
requested changes
Jul 23, 2025
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+1 to the general approach (although see my comments on the buildmaster-config PR for a possible direction for minimising the need for re-builds).
However, testing this manually yielded an compilation error on the mpdec build:
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(context.o): relocation R_WASM_MEMORY_ADDR_LEB cannot be used against symbol `mpd_setminalloc.minalloc_is_set`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(context.o): relocation R_WASM_MEMORY_ADDR_SLEB cannot be used against symbol `.L.str.1`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(context.o): relocation R_WASM_MEMORY_ADDR_LEB cannot be used against symbol `stderr`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(context.o): relocation R_WASM_MEMORY_ADDR_SLEB cannot be used against symbol `.L.str`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(context.o): relocation R_WASM_MEMORY_ADDR_SLEB cannot be used against symbol `.L.str.2`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(context.o): relocation R_WASM_MEMORY_ADDR_LEB cannot be used against symbol `mpd_setminalloc.minalloc_is_set`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(context.o): relocation R_WASM_MEMORY_ADDR_LEB cannot be used against symbol `MPD_MINALLOC`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(context.o): relocation R_WASM_MEMORY_ADDR_SLEB cannot be used against symbol `.L.str.1`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(context.o): relocation R_WASM_MEMORY_ADDR_LEB cannot be used against symbol `stderr`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(context.o): relocation R_WASM_MEMORY_ADDR_SLEB cannot be used against symbol `.L.str.3`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(context.o): relocation R_WASM_MEMORY_ADDR_SLEB cannot be used against symbol `.L.str.4`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(basearith.o): relocation R_WASM_MEMORY_ADDR_SLEB cannot be used against symbol `.L.str.1`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(basearith.o): relocation R_WASM_MEMORY_ADDR_LEB cannot be used against symbol `stderr`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(basearith.o): relocation R_WASM_MEMORY_ADDR_SLEB cannot be used against symbol `.L.str`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(basearith.o): relocation R_WASM_MEMORY_ADDR_SLEB cannot be used against symbol `.L.str.2`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(basearith.o): relocation R_WASM_MEMORY_ADDR_LEB cannot be used against symbol `mpd_free`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(basearith.o): relocation R_WASM_MEMORY_ADDR_LEB cannot be used against symbol `mpd_free`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(basearith.o): relocation R_WASM_MEMORY_ADDR_LEB cannot be used against symbol `mpd_pow10`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(basearith.o): relocation R_WASM_MEMORY_ADDR_LEB cannot be used against symbol `mpd_pow10`; recompile with -fPIC
wasm-ld: error: /Users/rkm/projects/python/cpython/cross-build/wasm32-emscripten/prefix/lib/libmpdec.a(convolute.o): relocation R_WASM_MEMORY_ADDR_SLEB cannot be used against symbol `mpd_moduli`; recompile with -fPIC
wasm-ld: error: too many errors emitted, stopping now (use -error-limit=0 to see all errors)
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A Python core developer has requested some changes be made to your pull request before we can consider merging it. If you could please address their requests along with any other requests in other reviews from core developers that would be appreciated. Once you have made the requested changes, please leave a comment on this pull request containing the phrase |
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Huh I wonder why I didn't get the fPIC problems. |
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I added |
freakboy3742
approved these changes
Jul 24, 2025
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Thanks @hoodmane for the PR, and @freakboy3742 for merging it 🌮🎉.. I'm working now to backport this PR to: 3.14. |
miss-islington
pushed a commit
to miss-islington/cpython
that referenced
this pull request
Jul 24, 2025
Adds tooling to build mpdec (and thus _decimal) as part of an Emscripten build. (cherry picked from commit ecb3f23) Co-authored-by: Hood Chatham <[email protected]>
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GH-137066 is a backport of this pull request to the 3.14 branch. |
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_decimal,_uuid,_sslor_hashlib#136976