emmake: error: 'make' failed (returned 2)

[vault-thirteen]

I am trying to compile WASM for a library using the instruction which I found on this page: https://emscripten.org/docs/compiling/Building-Projects.html

It says "To build with Emscripten, you would instead use the following commands:"

# Run emconfigure with the normal configure command as an argument.
emconfigure ./configure

# Run emmake with the normal make to generate Wasm object files.
emmake make

I skip the first step while the library has no configure script. I am trying to do the second step.

O.S. is Windows 10. When I use make from the MSYS2 bundle, it works fine. When I use emmake make it fails. The details are following.

I am trying to compile this library: https://github.com/P-H-C/phc-winner-argon2 git clone https://github.com/P-H-C/phc-winner-argon2.git I rename the repository folder into argon2, open the MSYS2 UCRT64 Terminal and do the following: cd argon2 make Result:

$ make
Building with optimizations for native
cc -std=c89 -O3 -Wall -g -Iinclude -Isrc -pthread -march=native  src/argon2.c src/core.c src/blake2/blake2b.c src/thread.c src/encoding.c src/opt.c src/run.c -o argon2
cc -std=c89 -O3 -Wall -g -Iinclude -Isrc -pthread -march=native -shared -Wl,--out-implib,libargon2.dll.a   src/argon2.c src/core.c src/blake2/blake2b.c src/thread.c src/encoding.c src/opt.c -o libargon2.dll
cc -std=c89 -O3 -Wall -g -Iinclude -Isrc -pthread -march=native   -c -o src/argon2.o src/argon2.c
cc -std=c89 -O3 -Wall -g -Iinclude -Isrc -pthread -march=native   -c -o src/core.o src/core.c
cc -std=c89 -O3 -Wall -g -Iinclude -Isrc -pthread -march=native   -c -o src/blake2/blake2b.o src/blake2/blake2b.c
cc -std=c89 -O3 -Wall -g -Iinclude -Isrc -pthread -march=native   -c -o src/thread.o src/thread.c
cc -std=c89 -O3 -Wall -g -Iinclude -Isrc -pthread -march=native   -c -o src/encoding.o src/encoding.c
cc -std=c89 -O3 -Wall -g -Iinclude -Isrc -pthread -march=native   -c -o src/opt.o src/opt.c
ar rcs libargon2.a src/argon2.o src/core.o src/blake2/blake2b.o src/thread.o src/encoding.o src/opt.o
sed '/^##.*$/d; s#@PREFIX@#/usr#g; s#@EXTRA_LIBS@##g; s#@UPSTREAM_VER@#ZERO#g; s#@HOST_MULTIARCH@#lib#g; s#@INCLUDE@#include#g;' < 'libargon2.pc.in' > 'libargon2.pc'

Then I reset the folder (delete it and clone git repository again). When I open "Emscripten Command Prompt" and use emmake make I get an error:

make: make
Building without optimizations
D:\Temp\1\emsdk\upstream\emscripten\emcc.bat -std=c89 -O3 -Wall -g -Iinclude -Isrc -pthread  src/argon2.c src/core.c src/blake2/blake2b.c src/thread.c src/encoding.c src/ref.c src/run.c -o argon2
emcc: warning: running limited binaryen optimizations because DWARF info requested (or indirectly required) [-Wlimited-postlink-optimizations]
D:\Temp\1\emsdk\upstream\emscripten\emcc.bat -std=c89 -O3 -Wall -g -Iinclude -Isrc -pthread -shared -Wl,--out-implib,libargon2.dll.a   src/argon2.c src/core.c src/blake2/blake2b.c src/thread.c src/encoding.c src/ref.c -o libargon2.dll
emcc: warning: linking a library with `-shared` will emit a static object file.  This is a form of emulation to support existing build systems.  If you want to build a runtime shared library use the SIDE_MODULE setting. [-Wemcc]
wasm-ld: error: unknown argument: --out-implib
wasm-ld: error: cannot open libargon2.dll.a: no such file or directory
emcc: error: 'D:/Temp/1/emsdk/upstream/bin\wasm-ld.exe -o libargon2.dll --out-implib libargon2.dll.a C:\Users\xxx\AppData\Local\Temp\emscripten_temp_9v7it_tv\argon2_0.o C:\Users\xxx\AppData\Local\Temp\emscripten_temp_9v7it_tv\core_1.o C:\Users\xxx\AppData\Local\Temp\emscripten_temp_9v7it_tv\blake2b_2.o C:\Users\xxx\AppData\Local\Temp\emscripten_temp_9v7it_tv\thread_3.o C:\Users\xxx\AppData\Local\Temp\emscripten_temp_9v7it_tv\encoding_4.o C:\Users\xxx\AppData\Local\Temp\emscripten_temp_9v7it_tv\ref_5.o -LD:\Temp\1\emsdk\upstream\emscripten\cache\sysroot\lib\wasm32-emscripten --relocatable -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr' failed (returned 1)
make: *** [Makefile:184: libargon2.dll] Error 1
emmake: error: 'make' failed (returned 2)

Is it possible to fix all this ? Thank you.

[sbc100]

The project in question is trying to use --out-implib as link flag and this flag is not supported by emscripten.

It looks like the Makefile is assuming you are targetting windows here: https://github.com/P-H-C/phc-winner-argon2/blob/f57e61e19229e23c4445b85494dbf7c07de721cb/Makefile#L90-L103

My advise would be to build the static version of the library. Try running make libargon2.a