Ok, it works if I change one thing: setting the -O flag from -O3 to -O0 (-O1 also already breaks).
...also it seems that calloc *is* actually called somewhere (the wasm crashes in the calloc stub when I build with ERROR_ON_UNDEFINED_SYMBOLS=0). But I still think it's not anywhere in my code (e.g. the Spine runtime has CALLOC macros all over the place, but this resolves to a call to a helper function with malloc+memset. On Saturday, 3 September 2022 at 15:21:18 UTC+2 Floh wrote: > PPS: ...looks like I can only go back to SDK version 3.0.0 on ARM Macs, > and the problem already existed in that version. > > On Saturday, 3 September 2022 at 15:16:42 UTC+2 Floh wrote: > >> PS: this is the wasm-ld cmdline: >> >> em++: error: '/Users/floh/projects/fips-sdks/emsdk/upstream/bin/wasm-ld >> -o >> /Users/floh/projects/fips-deploy/sokol-samples/sapp-webgl2-wasm-vscode-release/spine-sapp.wasm >> >> sapp/CMakeFiles/spine-sapp.dir/spine-sapp.c.obj >> sapp/CMakeFiles/spine-sapp.dir/spine-assets.c.obj libs/sokol/libsokol.a >> libs/spine-c/libspine-c.a libs/stb/libstb.a libs/util/libfileutil.a >> fips-cimgui_cimgui/libcimgui.a >> -L/Users/floh/projects/fips-sdks/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/lto >> >> -lGL-webgl2 -lal -lhtml5 -lstubs -lc -lcompiler_rt -lc++-noexcept >> -lc++abi-noexcept -lemmalloc -lc_rt -lsockets -mllvm >> -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm >> -disable-lsr >> --allow-undefined-file=/var/folders/dz/g9ydwg8973z9nn5bvffcwf3h0000gn/T/tmphqvycm26.undefined >> >> --strip-debug --export-if-defined=main --export-if-defined=stackSave >> --export-if-defined=stackRestore --export-if-defined=stackAlloc >> --export-if-defined=__wasm_call_ctors --export-if-defined=__errno_location >> --export-if-defined=malloc --export-if-defined=free >> --export-if-defined=__start_em_asm --export-if-defined=__stop_em_asm >> --export-table -z stack-size=5242880 --initial-memory=33554432 --entry=main >> --max-memory=2147483648 --global-base=1024' failed (returned 1) >> >> ...I'm now trying to bisect the SDK version to see if this is a >> regression... >> >> On Saturday, 3 September 2022 at 15:03:21 UTC+2 Floh wrote: >> >>> I just stumbled over a very weird problem in a new sample for my sokol >>> headers which includes a non-trivial 3rd party C library - the spine-c >>> runtime ( >>> https://github.com/EsotericSoftware/spine-runtimes/tree/4.1/spine-c/spine-c >>> ) >>> >>> When building in release mode (but not in debug mode) the linker >>> complains about an unresolved 'calloc' call. Adding detailed output >>> via LLD_REPORT_UNDEFINED=1 I get tons of: >>> >>> wasm-ld: error: >>> /Users/floh/projects/fips-sdks/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/lto/libemmalloc.a(emmalloc.o): >>> >>> undefined symbol: calloc >>> >>> ... how does that even make sense when emmalloc is supposed to provide >>> an implementation of calloc... anyway... >>> >>> The error goes away when compiling in debug mode (some differences that >>> come to mind to the release mode is that debug mode doesn't use -flto, and >>> also doesn't run the closure compiler). >>> >>> The problem also goes away when not building with emmalloc. >>> >>> Now the weird thing is that the entire code this sample is built from >>> doesn't appear to call calloc anywhere... and that other samples which >>> actually use calloc build just fines. >>> >>> Has anybody seen a similar problem yet, before I jump myself into the >>> rabbit hole? :) >>> >>> The problematic command line is: >>> >>> em++ -s DISABLE_EXCEPTION_CATCHING=1 -fno-exceptions -fno-rtti >>> -fstrict-aliasing -Wall -Wno-multichar -Wextra -Wno-unknown-pragmas >>> -Wno-ignored-qualifiers -Wno-long-long -Wno-overloaded-virtual >>> -Wno-deprecated-writable-strings -Wno-unused-volatile-lvalue >>> -Wno-inconsistent-missing-override -Wno-warn-absolute-paths >>> -Wno-expansion-to-defined -flto -O3 -DNDEBUG -s >>> DISABLE_EXCEPTION_CATCHING=1 --memory-init-file 0 -s >>> INITIAL_MEMORY=33554432 -s ERROR_ON_UNDEFINED_SYMBOLS=1 -s >>> NO_EXIT_RUNTIME=1 -s LLD_REPORT_UNDEFINED=1 -s ALLOW_MEMORY_GROWTH=1 -s >>> USE_WEBGL2=1 -s "MALLOC='emmalloc'" -s NO_FILESYSTEM=1 -s WASM=1 >>> --shell-file /Users/floh/projects/sokol-samples/webpage/shell.html -O3 >>> -flto --closure 1 -s ASSERTIONS=0 >>> sapp/CMakeFiles/spine-sapp.dir/spine-sapp.c.obj >>> sapp/CMakeFiles/spine-sapp.dir/spine-assets.c.obj -o >>> /Users/floh/projects/fips-deploy/sokol-samples/sapp-webgl2-wasm-vscode-release/spine-sapp.html >>> >>> libs/sokol/libsokol.a libs/spine-c/libspine-c.a libs/stb/libstb.a >>> libs/util/libfileutil.a fips-cimgui_cimgui/libcimgui.a >>> >> -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/emscripten-discuss/e6a227fb-d751-42a0-a717-0c5b684e4ee1n%40googlegroups.com.
