occur some error when complie

[deloverzeus]

I input command "emcmake cmake ..;make;"

em++: warning: object file output extension (.bc) used for non-object output. If you meant to build an object file please use -c, -r, or -shared` [-Wemcc]
[ 55%] Built target nanogui
[ 57%] Running bin2c
[ 59%] Building CXX object CMakeFiles/Tekari.dir/src/main.cpp.o
[ 61%] Building CXX object CMakeFiles/Tekari.dir/src/bsdf_application.cpp.o
[ 62%] Building CXX object CMakeFiles/Tekari.dir/src/bsdf_canvas.cpp.o
[ 64%] Building CXX object CMakeFiles/Tekari.dir/src/dataset.cpp.o
[ 66%] Building CXX object CMakeFiles/Tekari.dir/src/radial_grid.cpp.o
[ 67%] Building CXX object CMakeFiles/Tekari.dir/src/dataset_button.cpp.o
[ 69%] Building CXX object CMakeFiles/Tekari.dir/src/metadata.cpp.o
[ 71%] Building CXX object CMakeFiles/Tekari.dir/src/color_map.cpp.o
[ 72%] Building CXX object CMakeFiles/Tekari.dir/src/color_map_selection_window.cpp.o
[ 74%] Building CXX object CMakeFiles/Tekari.dir/src/color_map_button.cpp.o
[ 76%] Building CXX object CMakeFiles/Tekari.dir/src/metadata_window.cpp.o
[ 77%] Building CXX object CMakeFiles/Tekari.dir/src/help_window.cpp.o
[ 79%] Building CXX object CMakeFiles/Tekari.dir/src/axis.cpp.o
[ 81%] Building CXX object CMakeFiles/Tekari.dir/src/selections.cpp.o
[ 83%] Building CXX object CMakeFiles/Tekari.dir/src/raw_data_processing.cpp.o
[ 84%] Building CXX object CMakeFiles/Tekari.dir/src/points_stats.cpp.o
[ 86%] Building CXX object CMakeFiles/Tekari.dir/src/data_io.cpp.o
[ 88%] Building CXX object CMakeFiles/Tekari.dir/src/arrow.cpp.o
[ 89%] Building CXX object CMakeFiles/Tekari.dir/src/slider_2d.cpp.o
[ 91%] Building CXX object CMakeFiles/Tekari.dir/src/bsdf_dataset.cpp.o
[ 93%] Building CXX object CMakeFiles/Tekari.dir/src/wavelength_slider.cpp.o
[ 94%] Building CXX object CMakeFiles/Tekari.dir/tekari_resources.cpp.o
[ 96%] Linking CXX executable tekari.bc
ext_build/nanogui/libnanogui.bc:1:1: error: expected top-level entity
1 | // include: shell.js
| ^
1 error generated.
em++: error: '/home/overzeus/gitdir/emsdk/upstream/bin/clang++ -target wasm32-unknown-emscripten -fignore-exceptions -fvisibility=default -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr --sysroot=/home/overzeus/gitdir/emsdk/upstream/emscripten/cache/sysroot -DEMSCRIPTEN -Xclang -iwithsysroot/include/fakesdl -Xclang -iwithsysroot/include/compat -std=c++17 -O3 -DNDEBUG ext_build/nanogui/libnanogui.bc -c -o /tmp/emscripten_temp_6qvo21c8/libnanogui_0.o' failed (returned 1)
make[2]: *** [CMakeFiles/Tekari.dir/build.make:524：tekari.bc] error 1
make[1]: *** [CMakeFiles/Makefile2:158：CMakeFiles/Tekari.dir/all] error 2
make: *** [Makefile:136：all] error 2
emmake: error: 'make' failed (returned 2)

[DXXS]

Yes, I got this "error: expected top-level entity " too when compiling nanogui; I think it helps to see what it's doing if you turn on -D CMAKE_VERBOSE_MAKEFILE:BOOL=ON in the emcmake cmake call...
...
/Users/ds/Development/miniforge3/bin/cmake -E cmake_link_script CMakeFiles/nanogui.dir/link.txt --verbose=1
/Users/ds/Development/emsdk/upstream/emscripten/em++ -o libnanogui.bc @CMakeFiles/nanogui.dir/objects1.rsp
em++: warning: object file output extension (.bc) used for non-object output. If you meant to build an object file please use -c, -r, or -shared` [-Wemcc]
[ 78%] Built target nanogui
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f CMakeFiles/example1.dir/build.make CMakeFiles/example1.dir/depend
cd /Users/ds/Development/nanogui && /Users/ds/Development/miniforge3/bin/cmake -E cmake_depends "Unix Makefiles" /Users/ds/Development/nanogui /Users/ds/Development/nanogui /Users/ds/Development/nanogui /Users/ds/Development/nanogui /Users/ds/Development/nanogui/CMakeFiles/example1.dir/DependInfo.cmake --color=
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f CMakeFiles/example1.dir/build.make CMakeFiles/example1.dir/build
[ 80%] Building CXX object CMakeFiles/example1.dir/src/example1.cpp.o
/Users/ds/Development/emsdk/upstream/emscripten/em++ -DNANOGUI_GLES_VERSION=2 -DNANOGUI_USE_GLES @CMakeFiles/example1.dir/includes_CXX.rsp -O3 -DNDEBUG -fvisibility=hidden -O3 -DNDEBUG -std=gnu++17 -MD -MT CMakeFiles/example1.dir/src/example1.cpp.o -MF CMakeFiles/example1.dir/src/example1.cpp.o.d -o CMakeFiles/example1.dir/src/example1.cpp.o -c /Users/ds/Development/nanogui/src/example1.cpp
[ 82%] Linking CXX executable example1.bc
/Users/ds/Development/miniforge3/bin/cmake -E cmake_link_script CMakeFiles/example1.dir/link.txt --verbose=1
/Users/ds/Development/emsdk/upstream/emscripten/em++ -O3 -DNDEBUG @CMakeFiles/example1.dir/objects1.rsp -o example1.bc @CMakeFiles/example1.dir/linklibs.rsp
libnanogui.bc:1:1: error: expected top-level entity
1 | // include: shell.js
| ^
1 error generated.
em++: error: '/Users/ds/Development/emsdk/upstream/bin/clang++ -target wasm32-unknown-emscripten -fignore-exceptions -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr --sysroot=/Users/ds/Development/emsdk/upstream/emscripten/cache/sysroot -DEMSCRIPTEN -Xclang -iwithsysroot/include/fakesdl -Xclang -iwithsysroot/include/compat -O3 -DNDEBUG libnanogui.bc -c -o /var/folders/jg/109wtcf50lz0fh0z6fx1kdd40000gn/T/emscripten_temp_icie40zj/libnanogui_0.o' failed (returned 1)
...

Apparently the 'warning' should be an error instead... Not sure where to 'fix' things, but emscripten appears to jump directly from the object file in 'objects1.rsp' to javascript instead of generating the requested bytecode (?).

In my case, using "emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 3.1.63 (217010a223375e6e9251669187d406ef2ddf266e)".