Compilation errors when built with O2 optimizations #4506
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Also worth trying |
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I have clear cache and set EMCC_DEBUG=1. I got this in debug log. DEBUG:root:testing for asm.js target, because if not present (i.e. this is plain vanilla llvm, not emscripten fastcomp), we will use the wasm target instead (set EMCC_WASM_BACKEND to skip this check) How to build fastcomp? |
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You can use the sdk or build manually from source. |
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One thing I do not understand, isn't sdk-incoming-64bit already Fastcomp enabled? Can you tell me which branch or tag is Fastcomp enabled by default? |
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I'm having the same issue on SDK version 1.36.9 which is downloaded and built by |
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@kripken same issue when building from sources with VS2015 yesterday with
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This is likely windows-specific, so I don't think I can help much, maybe @juj has an idea. But I would check if you see that problem on small "hello world" programs too, might help narrow things down. |
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Yes I do. This simple code causes the problem. #include <iostream>
using namespace std;
int main()
{
cout << "Hello World!" << endl;
cout << "Welcome to C++ Programming" << endl;
}Full debug log: |
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I think this is not an unexistent fastcomp problem as my debug log says |
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Those |
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What does |
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There is only 1 line in my
This folder exists on my PC and is filled with clang tools. |
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Ah! I see what's going wrong. A silly programmer (me) forgot that an OS exists where |
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Unfortunately, it does not fix the issue. My cmdline output is as follows F:\Emscripten\emscripten\incoming>emcc helloworld.cpp -O2 -o helloworld.js |
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My problem is now fixed with installing incoming and then clearing cache. But now I'm seeing a new problem that constructing a module produced by const libflifem = _libflifem({ memoryInitializerPrefixURL: "built/" })
const decoder = new libflifem.FLIFDecoder();
// VM362:2 Uncaught TypeError: libflifem.FLIFDecoder is not a constructor
// a few seconds later
a = new libflifem.FLIFDecoder();
// FLIFDecoder {$$: Object}Workaround: add a setTimeout with timer 0 after module construction. (works on Chrome, not work on Firefox) |
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After putting some printf in js_optimizer.py, it seems that it split the work into 3 files in But I checked that folder did not contain these files! I find another folder(below) contains some temp files so this is not a permission issue.
I have tried O2 flag on the 1.35.0 installer. It works fine. So I shall stick to the official Windows installer for now. |
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Ok, sounds like that |
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The last call stack suggests that something went wrong during building the native
where If this does not give a clue, try |
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Hi juj, optimizer.exe exists in that folder. I'll continue to troubleshoot with printfs. I'll update here if there is progress. |
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Upgrading to 1.36.14 reintroduced this issue X( is_vanilla.txt: |
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I found this debug log: The valid directory name is Fixing this value removed the problem. |
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optimizer.exe on win10 x64 Not working properly，So I suspect this is the case optimizer.exe 在win10 x64上 不能正常的工作，因此我怀疑是这个文件的事情，虽然配置文件指定了这个文件路径！ |
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This issue has been automatically marked as stale because there has been no activity in the past 2 years. It will be closed automatically if no further activity occurs in the next 7 days. Feel free to re-open at any time if this issue is still relevant. |
If I remove the O2, I can built without errors. The emsdk is installed from sdk-incoming-64bit on 2016-08-21.
emsdk install --vs2015 sdk-incoming-64bit
I have plenty of free RAM(Total:16GB with no other programs running) and SSD space when the error happened.
F:\Emscripten\emscripten\incoming>emcc F:\App\SDL_App\TestEmscripten\TestEmscripten.cpp --bind -s FULL_ES2=1 -s USE_SDL=2 -s USE_SDL_IMAGE=2 -s ASSERTIONS=1 -D EMSCRIPTEN -std=c++11 -I F:\App\SDL_App\ext\glm-0.9.5.3\glm -O2 --llvm-opts 2 -o project.html
Traceback (most recent call last):
File "F:\Emscripten\emscripten\incoming\emcc", line 13, in
emcc.run()
File "F:\Emscripten\emscripten\incoming\emcc.py", line 1811, in run
JSOptimizer.flush()
File "F:\Emscripten\emscripten\incoming\emcc.py", line 1708, in flush
run_passes(chunks[0], title, just_split=False, just_concat=False)
File "F:\Emscripten\emscripten\incoming\emcc.py", line 1681, in run_passes
final = shared.Building.js_optimizer(final, passes, debug_level >= 4, JSOptimizer.extra_info, just_split=just_split, just_concat=just_concat)
File "F:\Emscripten\emscripten\incoming\tools\shared.py", line 1756, in js_optimizer
ret = js_optimizer.run(filename, passes, NODE_JS, debug, extra_info, just_split, just_concat)
File "F:\Emscripten\emscripten\incoming\tools\js_optimizer.py", line 555, in run
return temp_files.run_and_clean(lambda: run_on_js(filename, passes, js_engine, source_map, extra_info, just_split, just_concat))
File "F:\Emscripten\emscripten\incoming\tools\tempfiles.py", line 78, in run_and_clean
return func()
File "F:\Emscripten\emscripten\incoming\tools\js_optimizer.py", line 555, in
return temp_files.run_and_clean(lambda: run_on_js(filename, passes, js_engine, source_map, extra_info, just_split, just_concat))
File "F:\Emscripten\emscripten\incoming\tools\js_optimizer.py", line 450, in run_on_js
filenames = pool.map(run_on_chunk, commands, chunksize=1)
File "F:\Emscripten\python\2.7.5.3_64bit\lib\multiprocessing\pool.py", line 250, in map
return self.map_async(func, iterable, chunksize).get()
File "F:\Emscripten\python\2.7.5.3_64bit\lib\multiprocessing\pool.py", line 554, in get
raise self._value
WindowsError: [Error 2] The system cannot find the file specified
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