It looks like this message is coming from wasm-opt and is always printed when `--emit-symbol-map` is used.
Could you file a bug to get that warning removed from the stderr? On Sun, Nov 8, 2020 at 4:23 AM Remigijus Pankevičius < [email protected]> wrote: > With EMCC_DEBUG environment variable set to 1 and adding > --source-map-base param to get rid of first warning I see the warning > occurs during handle_final_wasm_symbols step. > > What does it mean? > > building:DEBUG: handle_final_wasm_symbols > warning: no output file specified, not emitting output > > C:\~src\Emscripten\play1\benchmarks\with-syms>set EMCC_DEBUG=1 > > C:\~src\Emscripten\play1\benchmarks\with-syms>emcc benchmark_utf8.cpp -s > "EXTRA_EXPORTED_RUNTIME_METHODS=['UTF8ToString']" --emit-symbol-map > --source-map-base http://localhost:8080/benchmarks/with-syms/ -o > benchmark_utf8-wasm-with-semit-symbol-map.html --embed-file utf8_corpus.txt > -g4 > shared:DEBUG: EM_CONFIG is located in C:\~src\Emscripten\emsdk\.emscripten > emcc:WARNING: invocation: > C:\~src\Emscripten\emsdk\upstream\emscripten\\emcc.py benchmark_utf8.cpp -s > EXTRA_EXPORTED_RUNTIME_METHODS=['UTF8ToString'] --emit-symbol-map > --source-map-base http://localhost:8080/benchmarks/with-syms/ -o > benchmark_utf8-wasm-with-semit-symbol-map.html --embed-file utf8_corpus.txt > -g4 (in C:\~src\Emscripten\play1\benchmarks\with-syms) > shared:DEBUG: successfully executed > C:/~src/Emscripten/emsdk/upstream/bin\clang.exe --version > shared:DEBUG: successfully executed > C:/~src/Emscripten/emsdk/node/12.18.1_64bit/bin/node.exe --version > shared:DEBUG: successfully executed > C:/~src/Emscripten/emsdk/upstream/bin\llc.exe --version > shared:INFO: (Emscripten: Running sanity checks) > shared:DEBUG: successfully executed > C:/~src/Emscripten/emsdk/node/12.18.1_64bit/bin/node.exe -e > console.log("hello") > emcc:DEBUG: compiling to bitcode > emcc:DEBUG: emcc step "parse arguments and setup" took 0.59 seconds > cache:DEBUG: PID 20208 acquiring multiprocess file lock to Emscripten > cache at C:\~src\Emscripten\emsdk\upstream\emscripten\cache\wasm > cache:DEBUG: done > emcc:DEBUG: compiling source file: benchmark_utf8.cpp > shared:DEBUG: successfully executed > C:/~src/Emscripten/emsdk/upstream/bin\clang++.exe -target > wasm32-unknown-emscripten -D__EMSCRIPTEN_major__=2 -D__EMSCRIPTEN_minor__=0 > -D__EMSCRIPTEN_tiny__=8 -D_LIBCPP_ABI_VERSION=2 -Dunix -D__unix -D__unix__ > -Werror=implicit-function-declaration -Xclang -nostdsysteminc -Xclang > -isystemC:\~src\Emscripten\emsdk\upstream\emscripten\system\include\libcxx > -Xclang > -isystemC:\~src\Emscripten\emsdk\upstream\emscripten\system\lib\libcxxabi\include > -Xclang > -isystemC:\~src\Emscripten\emsdk\upstream\emscripten\system\include\compat > -Xclang -isystemC:\~src\Emscripten\emsdk\upstream\emscripten\system\include > -Xclang > -isystemC:\~src\Emscripten\emsdk\upstream\emscripten\system\include\libc > -Xclang > -isystemC:\~src\Emscripten\emsdk\upstream\emscripten\system\lib\libc\musl\arch\emscripten > -Xclang > -isystemC:\~src\Emscripten\emsdk\upstream\emscripten\system\local\include > -Xclang > -isystemC:\~src\Emscripten\emsdk\upstream\emscripten\system\include\SSE > -Xclang > -isystemC:\~src\Emscripten\emsdk\upstream\emscripten\system\include\neon > -Xclang > -isystemC:\~src\Emscripten\emsdk\upstream\emscripten\system\lib\compiler-rt\include > -Xclang > -isystemC:\~src\Emscripten\emsdk\upstream\emscripten\system\lib\libunwind\include > -Xclang > -isystemC:\~src\Emscripten\emsdk\upstream\emscripten\cache\wasm\include > -DEMSCRIPTEN -fignore-exceptions -o > benchmark_utf8-wasm-with-semit-symbol-map.html -g benchmark_utf8.cpp > -Xclang > -isystemC:\~src\Emscripten\emsdk\upstream\emscripten\system\include\SDL -c > -o > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\benchmark_utf8_0.o > -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj > -mllvm -disable-lsr > emcc:DEBUG: emcc step "compile inputs" took 1.00 seconds > emcc:DEBUG: emcc step "process inputs" took 0.00 seconds > shared:DEBUG: executed C:/~src/Emscripten/emsdk/upstream/bin\llvm-nm.exe > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\benchmark_utf8_0.o > system_libs:DEBUG: including libc (libc.a) > system_libs:DEBUG: including libcompiler_rt (libcompiler_rt.a) > system_libs:DEBUG: including libc++ (libc++-noexcept.a) > system_libs:DEBUG: including libc++abi (libc++abi-noexcept.a) > system_libs:DEBUG: including libmalloc (libdlmalloc.a) > system_libs:DEBUG: including libpthread (libpthread_stub.a) > system_libs:DEBUG: including libc_rt_wasm (libc_rt_wasm.a) > system_libs:DEBUG: including libsockets (libsockets.a) > emcc:DEBUG: emcc step "calculate system libraries" took 0.05 seconds > emcc:DEBUG: linking: > ['C:\\Users\\(my-user-name)\\AppData\\Local\\Temp\\emscripten_temp\\benchmark_utf8_0.o', > '-LC:\\~src\\Emscripten\\emsdk\\upstream\\emscripten\\system\\local\\lib', > '-LC:\\~src\\Emscripten\\emsdk\\upstream\\emscripten\\system\\lib', > '-LC:\\~src\\Emscripten\\emsdk\\upstream\\emscripten\\cache\\wasm', > 'C:\\~src\\Emscripten\\emsdk\\upstream\\emscripten\\cache\\wasm\\libc.a', > 'C:\\~src\\Emscripten\\emsdk\\upstream\\emscripten\\cache\\wasm\\libcompiler_rt.a', > 'C:\\~src\\Emscripten\\emsdk\\upstream\\emscripten\\cache\\wasm\\libc++-noexcept.a', > 'C:\\~src\\Emscripten\\emsdk\\upstream\\emscripten\\cache\\wasm\\libc++abi-noexcept.a', > 'C:\\~src\\Emscripten\\emsdk\\upstream\\emscripten\\cache\\wasm\\libdlmalloc.a', > 'C:\\~src\\Emscripten\\emsdk\\upstream\\emscripten\\cache\\wasm\\libpthread_stub.a', > 'C:\\~src\\Emscripten\\emsdk\\upstream\\emscripten\\cache\\wasm\\libc_rt_wasm.a', > 'C:\\~src\\Emscripten\\emsdk\\upstream\\emscripten\\cache\\wasm\\libsockets.a'] > shared:DEBUG: successfully executed > C:/~src/Emscripten/emsdk/upstream/bin\wasm-ld.exe -o > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\benchmark_utf8-wasm-with-semit-symbol-map.wasm > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\benchmark_utf8_0.o > -LC:\~src\Emscripten\emsdk\upstream\emscripten\system\local\lib > -LC:\~src\Emscripten\emsdk\upstream\emscripten\system\lib > -LC:\~src\Emscripten\emsdk\upstream\emscripten\cache\wasm > C:\~src\Emscripten\emsdk\upstream\emscripten\cache\wasm\libc.a > C:\~src\Emscripten\emsdk\upstream\emscripten\cache\wasm\libcompiler_rt.a > C:\~src\Emscripten\emsdk\upstream\emscripten\cache\wasm\libc++-noexcept.a > C:\~src\Emscripten\emsdk\upstream\emscripten\cache\wasm\libc++abi-noexcept.a > C:\~src\Emscripten\emsdk\upstream\emscripten\cache\wasm\libdlmalloc.a > C:\~src\Emscripten\emsdk\upstream\emscripten\cache\wasm\libpthread_stub.a > C:\~src\Emscripten\emsdk\upstream\emscripten\cache\wasm\libc_rt_wasm.a > C:\~src\Emscripten\emsdk\upstream\emscripten\cache\wasm\libsockets.a -mllvm > -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm > -disable-lsr --allow-undefined --import-memory --export-table --export main > --export stackSave --export stackRestore --export stackAlloc --export > __data_end --export __wasm_call_ctors --export fflush --export > __errno_location --export malloc --export free -z stack-size=5242880 > --initial-memory=16777216 --no-entry --max-memory=16777216 > --global-base=1024 > emcc:DEBUG: emcc step "link" took 0.05 seconds > emcc:DEBUG: LLVM => JS > building:DEBUG: saving debug copy > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\emcc-0-base.wasm > shared:DEBUG: EM_CONFIG is located in C:\~src\Emscripten\emsdk\.emscripten > wasm-sourcemap:DEBUG: Reading DWARF information from > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\benchmark_utf8-wasm-with-semit-symbol-map.wasm > wasm-sourcemap:DEBUG: Read sections index > wasm-sourcemap:DEBUG: Saving to > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\benchmark_utf8-wasm-with-semit-symbol-map.wasm.map > wasm-sourcemap:DEBUG: Done > shared:DEBUG: successfully executed > C:\~src\Emscripten\emsdk\python\3.7.4-pywin32_64bit\python.exe > C:\~src\Emscripten\emsdk\upstream\emscripten\tools\wasm-sourcemap.py > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\benchmark_utf8-wasm-with-semit-symbol-map.wasm > --dwarfdump=C:/~src/Emscripten/emsdk/upstream/bin\llvm-dwarfdump.exe -o > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\benchmark_utf8-wasm-with-semit-symbol-map.wasm.map > --basepath=C:\~src\Emscripten\play1\benchmarks\with-syms > building:DEBUG: saving debug copy > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\emcc-1-base_wasm.map > shared:DEBUG: successfully executed > C:/~src/Emscripten/emsdk/upstream\bin\wasm-opt.exe --version > shared:DEBUG: successfully executed > C:/~src/Emscripten/emsdk/upstream\bin\wasm-emscripten-finalize > --detect-features --minimize-wasm-changes --output-source-map-url= > http://localhost:8080/benchmarks/with-syms/benchmark_utf8-wasm-with-semit-symbol-map.wasm.map > -g --dyncalls-i64 --global-base=1024 --dwarf > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\benchmark_utf8-wasm-with-semit-symbol-map.wasm > -o > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\benchmark_utf8-wasm-with-semit-symbol-map.wasm > --input-source-map=C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\benchmark_utf8-wasm-with-semit-symbol-map.wasm.map > --output-source-map=C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\benchmark_utf8-wasm-with-semit-symbol-map.wasm.map > building:DEBUG: saving debug copy > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\emcc-2-wasm-emscripten-finalize.wasm > building:DEBUG: saving debug copy > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\emcc-3-post_finalize.wasm > building:DEBUG: saving debug copy > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\emcc-4-post_finalize.map > emscripten:DEBUG: Metadata parsed: {'asmConsts': {'1024': ['{ var t0 = > _emscripten_get_now(); var str = ' > 'Module.UTF8ToString($0); var t1 = ' > '_emscripten_get_now(); return (t1-t0); }', > ['dii'], > ['']]}, > 'declares': ['emscripten_asm_const_double', > '__assert_fail', > 'time', > 'emscripten_get_now', > '__sys_open', > 'fd_close', > '__sys_fcntl64', > '__sys_ioctl', > 'fd_read', > 'fd_write', > 'abort', > 'emscripten_resize_heap', > 'emscripten_memcpy_big', > 'setTempRet0', > 'fd_seek'], > 'emJsFuncs': {}, > 'exports': ['__wasm_call_ctors', > 'main', > '__errno_location', > 'fflush', > 'free', > 'malloc', > 'stackSave', > 'stackRestore', > 'stackAlloc', > 'dynCall_jiji'], > 'externs': [], > 'features': [], > 'implementedFunctions': [], > 'initializers': ['___wasm_call_ctors'], > 'invokeFuncs': [], > 'mainReadsParams': 1, > 'namedGlobals': {'__data_end': '3848'}, > 'simd': False, > 'staticBump': 2824, > 'tableSize': 9} > emscripten:DEBUG: emscript: js compiler glue > shared:DEBUG: successfully executed > C:/~src/Emscripten/emsdk/node/12.18.1_64bit/bin/node.exe > C:\~src\Emscripten\emsdk\upstream\emscripten\src\compiler.js > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\tmpmcwnsimc.txt > emscripten:DEBUG: emscript: glue took 0.2664790153503418 seconds > emscripten:DEBUG: stack_base: 5246736, stack_max: 3856, dynamic_base: > 5246736, static bump: 2832 > building:DEBUG: saving debug copy > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\emcc-5-original.js > root:DEBUG: move: > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\benchmark_utf8-wasm-with-semit-symbol-map.wasm > -> > C:\~src\Emscripten\play1\benchmarks\with-syms\benchmark_utf8-wasm-with-semit-symbol-map.wasm > root:DEBUG: move: > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\benchmark_utf8-wasm-with-semit-symbol-map.wasm.map > -> > C:\~src\Emscripten\play1\benchmarks\with-syms\benchmark_utf8-wasm-with-semit-symbol-map.wasm.map > emcc:DEBUG: emcc step "emscript (llvm => executable code)" took 0.61 > seconds > emcc:DEBUG: setting up files > shared:DEBUG: EM_CONFIG is located in C:\~src\Emscripten\emsdk\.emscripten > utf8_corpus.txt > C:\~src\Emscripten\play1\benchmarks\with-syms\utf8_corpus.txt > C:\~src\Emscripten\play1\benchmarks\with-syms > Packaging file "utf8_corpus.txt" to VFS in path "/utf8_corpus.txt". > shared:DEBUG: successfully executed > C:\~src\Emscripten\emsdk\python\3.7.4-pywin32_64bit\python.exe > C:\~src\Emscripten\emsdk\upstream\emscripten\tools\file_packager.py > benchmark_utf8-wasm-with-semit-symbol-map.data --from-emcc > --export-name=Module --embed utf8_corpus.txt > emcc:DEBUG: applying pre/postjses > building:DEBUG: saving debug copy > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\emcc-6-pre-post.js > emcc:DEBUG: emcc step "source transforms" took 0.19 seconds > emcc:DEBUG: using binaryen > building:DEBUG: saving debug copy > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\emcc-7-pre-byn.wasm > shared:DEBUG: successfully executed > C:/~src/Emscripten/emsdk/upstream\bin\wasm-opt --strip-dwarf > --strip-producers benchmark_utf8-wasm-with-semit-symbol-map.wasm -o > benchmark_utf8-wasm-with-semit-symbol-map.wasm -g --mvp-features > --input-source-map=benchmark_utf8-wasm-with-semit-symbol-map.wasm.map > --output-source-map=benchmark_utf8-wasm-with-semit-symbol-map.wasm.map > building:DEBUG: saving debug copy > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\emcc-8-wasm-opt.wasm > building:DEBUG: handle_final_wasm_symbols > warning: no output file specified, not emitting output > shared:DEBUG: successfully executed > C:/~src/Emscripten/emsdk/upstream\bin\wasm-opt --print-function-map > benchmark_utf8-wasm-with-semit-symbol-map.wasm --mvp-features > building:DEBUG: saving debug copy > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\emcc-9-symbolmap.js > building:DEBUG: saving debug copy > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\emcc-10-symbolmap.wasm > emcc:DEBUG: emcc step "binaryen" took 0.08 seconds > emcc:DEBUG: Private module export name substitution with Module > building:DEBUG: saving debug copy > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\emcc-11-module_export_name_substitution.js > root:DEBUG: move: > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\benchmark_utf8-wasm-with-semit-symbol-map.wasm.js.pp.js.module_export_name_substitution.js > -> > C:\~src\Emscripten\play1\benchmarks\with-syms\benchmark_utf8-wasm-with-semit-symbol-map.js > emcc:DEBUG: generating HTML > shared:DEBUG: successfully executed > C:/~src/Emscripten/emsdk/node/12.18.1_64bit/bin/node.exe > C:\~src\Emscripten\emsdk\upstream\emscripten\tools/preprocessor.js > C:\Users\(my-user-name)\AppData\Local\Temp\emscripten_temp\settings.js > shell.html > emcc:DEBUG: emcc step "final emitting" took 0.16 seconds > cache:DEBUG: PID 20208 released multiprocess file lock to Emscripten cache > at C:\~src\Emscripten\emsdk\upstream\emscripten\cache\wasm > emcc:DEBUG: total time: 2.14 seconds > > > 2020 m. lapkričio 7 d., šeštadienis 16:49:35 UTC+2 Remigijus Pankevičius > rašė: > >> Hi, >> >> I've copied 2 files benchmark_utf8.cpp and utf8_corpus.txt from >> Emscripten test suite to a separate folder and I'm getting this strange >> warning when compiling: >> >> Command: >> emcc benchmark_utf8.cpp -s >> "EXTRA_EXPORTED_RUNTIME_METHODS=['UTF8ToString']" --emit-symbol-map -o >> benchmark_utf8-wasm-with-semit-symbol-map.html --embed-file utf8_corpus.txt >> -g4 >> >> Output: >> emcc:WARNING: Wasm source map won't be usable in a browser without >> --source-map-base >> warning: no output file specified, not emitting output >> >> >> -- > 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/6ca2bc3a-3df1-449c-bb60-7f4840bafaa6n%40googlegroups.com > <https://groups.google.com/d/msgid/emscripten-discuss/6ca2bc3a-3df1-449c-bb60-7f4840bafaa6n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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/CAL_va2_0tyw%3Dam%2BTfu-R-o-KieMDPyN81BNEPRBOVDi%3D7oX9QQ%40mail.gmail.com.
