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/c47cee25-6e4b-4fbe-9f6f-0d7da7e02562n%40googlegroups.com.
