I tried to find out the differences in the build step.
I removed a header file and made the build fail .... so that I could get
the compiler line print out
Here is the one with autotools
=========================================
em++: error: '/home/myname/emsdk/upstream/bin/clang++ -target
wasm32-unknown-emscripten -DEMSCRIPTEN -fignore-exceptions -mllvm
-combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm
-disable-lsr -D__EMSCRIPTEN_major__=3 -D__EMSCRIPTEN_minor__=0
-D__EMSCRIPTEN_tiny__=0 -D_LIBCPP_ABI_VERSION=2
-Werror=implicit-function-declaration -Xclang -iwithsysroot/include/SDL
--sysroot=/home/myname/emsdk/upstream/emscripten/cache/sysroot -Xclang
-iwithsysroot/include/compat -DHAVE_CONFIG_H -I. -I../..
*-fvisibility=hidden* -DBUILDING_LIBmySPELL -g -O2 -MT myspell.lo -MD -MP
-MF .deps/myspell.Tpo -c -fPIC -DPIC myspell.cxx -o .libs/myspell.o' failed
(returned 1)
=========================================
Here is the one with CMake
=========================================
em++: error: '/home/myname/emsdk/upstream/bin/clang++ -target
wasm32-unknown-emscripten -DEMSCRIPTEN -fignore-exceptions
*-fvisibility=default* -mllvm -combiner-global-alias-analysis=false -mllvm
-enable-emscripten-sjlj -mllvm -disable-lsr -D__EMSCRIPTEN_major__=3
-D__EMSCRIPTEN_minor__=0 -D__EMSCRIPTEN_tiny__=0 -D_LIBCPP_ABI_VERSION=2
-Werror=implicit-function-declaration -Xclang -iwithsysroot/include/SDL
--sysroot=/home/myname/emsdk/upstream/emscripten/cache/sysroot -Xclang
-iwithsysroot/include/compat -I/home/myname/cmake_expt/myspell/include -c
/home/myname/cmake_expt/myspell/src/myspell.cxx -o
CMakeFiles/myspell.dir/src/myspell.cxx.o' failed (returned 1)
=========================================
I can see the difference in the visibility setting. Also I see there are
are -g O2 -MT -MD -MP -MF -fPIC -dPIC in Autotools but not in CMake.
See if anybody could find anything from this.
Also pl tell me where to make the required change
Thanks
On Thursday, December 30, 2021 at 5:52:07 AM UTC-5 Mahesh Velankar wrote:
> Brion,
> Thanks for taking time to address my question.
> Where should I put that compiler flag?
>
> This is my CMakeLists.txt file
>
> =================================================================
> cmake_minimum_required(VERSION 3.5)
>
> #project(hello_library)
> project(myspell)
>
> ############################################################
> # Create a library
> ############################################################
>
> #Generate the static library from the library sources
> add_library(myspell STATIC•
> src/myspell.cxx
> src/dict.cxx
> src/msp.cxx
> )
>
> target_include_directories(myspell
> PUBLIC•
> ${PROJECT_SOURCE_DIR}/include
> )
>
>
> ############################################################
> # Create an executable
> ############################################################
>
> # Add an executable with the above sources
> add_executable(myspell-bin•
> src/main.cxx
> )
>
> # link the new myspell target with the myspell-bin target
> target_link_libraries( myspell-bin
> PRIVATE•
> myspell
> )
> # now we rename myspell-bin executable to myspell using target properties
> set_target_properties(myspell-bin
> PROPERTIES OUTPUT_NAME myspell)
> =================================================================
>
> and this is how I am building it
>
> ===============================================
> #! /bin/bash
> ls
> rm -rf build
> mkdir -p build
>
> cd build
>
> emcmake cmake ..
> emmake make
> em++ -s ALLOW_MEMORY_GROWTH=1 -s INITIAL_MEMORY=33554432 -s
> EXPORTED_FUNCTIONS="['_Myspell_create', '_Myspell_spell',
> '_Myspell_suggest', '_Myspell_free_list', '_Myspell_destroy']"
> ./libmyspell.a -o myspell.js
>
> cp ../myspell-worker.js .
> ===============================================
>
> Please let me know where should I make the changes.
> Also please let me know if I need to provide more details
>
> Thanks
> -Mahesh
>
> On Wednesday, December 29, 2021 at 10:03:08 PM UTC-5 br..com wrote:
>
>> On Wed, Dec 29, 2021 at 2:13 PM Ma ... wrote:
>>
>>> First I tried it with auto tools (since hunspell was already built for
>>> wasm using auto tools)......I refereed to the same (hunspell-wasm) build
>>> environment and just changed the details to get my wasm..........and that
>>> worked very very well.........Speed was amazing in the web page.
>>>
>>> Then I tried to build the same code with cmake..... as I wanted to do
>>> the whole thing by myself .... better than the above copy paste approach
>>> for future support. I thought cmake was easier to grasp than autotools,. So
>>> I followed a tutorial and successfully built the wasm. That wasm also worked
>>>
>>> However strangely this cmake based wasm performs about 10 times slower
>>> than the autotools based built wasm. (this 10 times thing is just a
>>> guess......no measurement......but it moves with ant's speed compared to
>>> the earlier)
>>>
>>
>> As a guess, did you not include an optimization option in the compiler
>> flags on the CMake version?
>>
>> -- brion
>>
>>
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