compiler fontend failed to generate LLVM bitcode...

[SaxonGao-SZ]

Hello , I try to compile openHEVC source code to *.bc file .

commands ：

$ emconfigure cmake -DCMAKE_BUILD_TYPE=Release ..
DEBUG: CMAKE_SYSTEM_PROCESSOR = x86
DEBUG: CMAKE_SYSTEM_NAME      = Emscripten
-- Check size of void*
-- Check size of void* - done
DEBUG: SIZEOF_VOID_P      =
-- target changed from "" to "auto"
-- Detected CPU: generic
-- Performing Test check_cxx_compiler_flag__march_generic
-- Performing Test check_cxx_compiler_flag__march_generic - Failed
-- Performing Test check_cxx_compiler_flag__mno_sse2
-- Performing Test check_cxx_compiler_flag__mno_sse2 - Failed
-- Performing Test check_cxx_compiler_flag__mno_sse3
-- Performing Test check_cxx_compiler_flag__mno_sse3 - Failed
-- Performing Test check_cxx_compiler_flag__mno_ssse3
-- Performing Test check_cxx_compiler_flag__mno_ssse3 - Failed
-- Performing Test check_cxx_compiler_flag__mno_sse4_1
-- Performing Test check_cxx_compiler_flag__mno_sse4_1 - Failed
-- Performing Test check_cxx_compiler_flag__mno_sse4_2
-- Performing Test check_cxx_compiler_flag__mno_sse4_2 - Failed
-- Performing Test check_cxx_compiler_flag__mno_sse4a
-- Performing Test check_cxx_compiler_flag__mno_sse4a - Failed
-- Performing Test check_cxx_compiler_flag__mno_avx
-- Performing Test check_cxx_compiler_flag__mno_avx - Failed
-- Performing Test check_cxx_compiler_flag__mno_xop
-- Performing Test check_cxx_compiler_flag__mno_xop - Failed
-- Performing Test check_cxx_compiler_flag__mno_fma4
-- Performing Test check_cxx_compiler_flag__mno_fma4 - Failed
-- Performing Test check_cxx_compiler_flag__mno_avx2
-- Performing Test check_cxx_compiler_flag__mno_avx2 - Failed
-- Looking for GetProcessAffinityMask
-- Looking for GetProcessAffinityMask - not found
-- Looking for gettimeofday
-- Looking for gettimeofday - found
-- Looking for sched_getaffinity
-- Looking for sched_getaffinity - not found
-- Looking for strerror_r
-- Looking for strerror_r - found
-- Looking for sysconf
-- Looking for sysconf - found
-- Looking for usleep
-- Looking for usleep - found
-- Looking for localtime_r
-- Looking for localtime_r - found
-- Looking for gmtime_r
-- Looking for gmtime_r - found
-- Looking for include file fcntl.h
-- Looking for include file fcntl.h - found
-- Looking for include file pthread.h
-- Looking for include file pthread.h - found
-- Looking for include file unistd.h
-- Looking for include file unistd.h - found
-- Looking for include file windows.h
-- Looking for include file windows.h - not found
-- Found YASM: /usr/bin/yasm 
-- Found components for YASM
-- YASM_ROOT_DIR  = /usr/local
-- YASM_INCLUDES  = YASM_INCLUDES-NOTFOUND
-- YASM_LIBRARIES = YASM_LIBRARIES-NOTFOUND
-- Performing Test check_c_compiler_flag__fpic
-- Performing Test check_c_compiler_flag__fpic - Success
-- Performing Test check_c_compiler_flag__fno_tree_vectorize
-- Performing Test check_c_compiler_flag__fno_tree_vectorize - Success
-- Looking for pthread_create
-- Looking for pthread_create - found
-- Found Threads: TRUE 
-- Could NOT find SDL (missing:  SDL_LIBRARY) (found version "1.3.0")
-- Could NOT find SDL2 (missing:  SDL2_LIBRARY SDL2_INCLUDE_DIR)
-- Configuring done
-- Generating done
-- Build files have been written to: /datas/saxongao/dev/openHEVC.wsam/build_wasm
$ emmake make
[  1%] Generating videodsp.o
[  1%] Generating cpuid.o
[  2%] Generating emms.o
[  2%] Generating dct32.o
[  3%] Generating deinterlace.o
[  4%] Generating fft.o
/datas/saxongao/dev/openHEVC.wsam/libavcodec/x86/fft.asm:54: warning: section flags ignored on section redeclaration
[  4%] Generating fpel.o
[  5%] Generating h264_qpel_8bit.o
[  6%] Generating h264_qpel_10bit.o
[  6%] Generating hevc_mc.o
[  7%] Generating hevc_deblock.o
[  7%] Generating hevc_idct.o
[  8%] Generating hpeldsp.o
[  9%] Generating qpel.o
[  9%] Generating qpeldsp.o
Scanning dependencies of target LibOpenHevcWrapper
[ 10%] Building C object CMakeFiles/LibOpenHevcWrapper.dir/libavutil/avstring.c.o
In file included from /datas/saxongao/dev/openHEVC.wsam/libavutil/avstring.c:28:
In file included from /datas/saxongao/dev/openHEVC.wsam/libavutil/common.h:45:
In file included from /datas/saxongao/dev/openHEVC.wsam/libavutil/internal.h:39:
In file included from /datas/saxongao/dev/openHEVC.wsam/libavutil/timer.h:46:
/datas/saxongao/dev/openHEVC.wsam/libavutil/x86/timer.h:34:32: error: invalid output constraint '=a' in asm
    __asm__ volatile("rdtsc" : "=a" (a), "=d" (d));
                               ^
1 error generated.
ERROR:root:compiler frontend failed to generate LLVM bitcode, halting
CMakeFiles/LibOpenHevcWrapper.dir/build.make:123: recipe for target 'CMakeFiles/LibOpenHevcWrapper.dir/libavutil/avstring.c.o' failed
make[2]: *** [CMakeFiles/LibOpenHevcWrapper.dir/libavutil/avstring.c.o] Error 1
CMakeFiles/Makefile2:99: recipe for target 'CMakeFiles/LibOpenHevcWrapper.dir/all' failed
make[1]: *** [CMakeFiles/LibOpenHevcWrapper.dir/all] Error 2
Makefile:127: recipe for target 'all' failed
make: *** [all] Error 2

Waht the problem ? can you help me ?

[kripken]

emscripten can't compile inline assembly, only portable C/C++.

Perhaps the codebase has a flag to use a generic code path, without inline assembly for a specific CPU.

[SaxonGao-SZ]

First , thanks for your replay! realy.
You are right , I found ARCH_X86 options in file : openHEVC/platform/x86/config.h.in (line 62):

define ARCH_X86 1

this options will run the YASM codes when compiling. I edited it like this : define ARCH_X86 0 , now This problem was done , but still others~, I will close this issue.
Thanks again!

[kripken]

Good, glad there was a flag for that!

[billy4656515]

I try to compile OpenHEVC with emscripten too, I end up with a lot of error, how did you do it?

[SaxonGao-SZ]

Try changing LYSM to C/C++ code  发自我的iPhone

…

------------------ Original ------------------ From: billy4656515 ***@***.***> Date: Mon,Jun 19,2023 6:30 PM To: emscripten-core/emsdk ***@***.***> Cc: SaxonGao-SZ ***@***.***>, Author ***@***.***> Subject: Re: [emscripten-core/emsdk] compiler fontend failed to generate LLVMbitcode... (#163) I try to compile OpenHEVC with emscripten too, I end up with a lot of error, how did you do it? — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: ***@***.***>

[SaxonGao-SZ]

emscripten do not support ： - LYSM - multithreading/multiprocess - SIMD change then to equivalent C code or other solution 发自我的iPhone

…

------------------ Original ------------------ From: billy4656515 ***@***.***> Date: Mon,Jun 19,2023 6:30 PM To: emscripten-core/emsdk ***@***.***> Cc: SaxonGao-SZ ***@***.***>, Author ***@***.***> Subject: Re: [emscripten-core/emsdk] compiler fontend failed to generate LLVMbitcode... (#163) I try to compile OpenHEVC with emscripten too, I end up with a lot of error, how did you do it? — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: ***@***.***>

[billy4656515]

how to do that? on the configuration file (config.h.in line62) I deactivated the use of ARCH_x86 but I find myself with errors :
openHEVC/libavcodec/hevc.c:3264:9: error: call to undeclared function 'ff_hevc_bump_frame'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
3264 | ff_hevc_bump_frame(s);
| ^

[SaxonGao-SZ]

check this method openHEVC/libavcodec/hevc.c:3264:9: error: call to undeclared function 'ff_hevc_bump_frame';  发自我的iPhone

…

------------------ Original ------------------ From: billy4656515 ***@***.***> Date: Mon,Jun 19,2023 7:21 PM To: emscripten-core/emsdk ***@***.***> Cc: SaxonGao-SZ ***@***.***>, Author ***@***.***> Subject: Re: [emscripten-core/emsdk] compiler fontend failed to generate LLVMbitcode... (#163) how to do that? on the configuration file (config.h.in line62) I deactivated the use of ARCH_x86 but I find myself with errors : openHEVC/libavcodec/hevc.c:3264:9: error: call to undeclared function 'ff_hevc_bump_frame'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 3264 | ff_hevc_bump_frame(s); | ^ — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: ***@***.***>

[billy4656515]

the problem is that as soon as I correct an error it becomes a chain reaction and many other errors appear and I don't want to alter the code more than that, there is surely a way to compile OpenhEVC with Emscripten without altering the code too much.