You're right, it tries to pick up the native macOS library.
So I removed this from Makefile: EXTLIBS += -lz
The output now changed, but the symbols are still missing:
============
➜ git git:(master) ✗ emmake make all CXX=em++ CC=emcc
NO_REGEX=NeedsStartEnd NO_NSEC=1 NO_APPLE_COMMON_CRYPTO=1 AR=emar
CSPRNG_METHOD=getentropy NO_PTHREADS=1 NO_UNIX_SOCKETS=1 NO_PERL=1
NO_GETTEXT=1 NO_PYTHON=1 NO_IPV6=1 RANLIB=emranlib NO_INITGROUPS=1
NO_ICONV=1 -s USE_ZLIB=1
make: make all CXX=em++ CC=emcc NO_REGEX=NeedsStartEnd NO_NSEC=1
NO_APPLE_COMMON_CRYPTO=1 AR=emar CSPRNG_METHOD=getentropy NO_PTHREADS=1
NO_UNIX_SOCKETS=1 NO_PERL=1 NO_GETTEXT=1 NO_PYTHON=1 NO_IPV6=1
RANLIB=emranlib NO_INITGROUPS=1 NO_ICONV=1 -s USE_ZLIB=1
GIT_VERSION = 2.39.0.49.gf66d6d1.dirty
* new build flags
* new link flags
* new prefix flags
wasm-ld: error: libgit.a(csum-file.o): undefined symbol: crc32
wasm-ld: error: libgit.a(csum-file.o): undefined symbol: crc32
wasm-ld: error: libgit.a(csum-file.o): undefined symbol: crc32
wasm-ld: error: libgit.a(csum-file.o): undefined symbol: crc32
wasm-ld: error: libgit.a(zlib.o): undefined symbol: inflateInit_
wasm-ld: error: libgit.a(zlib.o): undefined symbol: inflateEnd
wasm-ld: error: libgit.a(zlib.o): undefined symbol: inflate
wasm-ld: error: libgit.a(zlib.o): undefined symbol: deflateInit_
wasm-ld: error: libgit.a(zlib.o): undefined symbol: deflateEnd
wasm-ld: error: libgit.a(zlib.o): undefined symbol: deflateEnd
wasm-ld: error: libgit.a(zlib.o): undefined symbol: deflate
emcc: error: '/opt/local/libexec/llvm-devel/bin/wasm-ld -o git-daemon.wasm
-L/opt/local/lib daemon.o common-main.o libgit.a xdiff/lib.a
reftable/libreftable.a libgit.a
-L/opt/local/libexec/emscripten/cache/sysroot/lib/wasm32-emscripten -lGL
-lal -lhtml5 -lstubs -lnoexit -lc -ldlmalloc -lcompiler_rt -lc++-noexcept
-lc++abi-noexcept -lsockets -mllvm -combiner-global-alias-analysis=false
-mllvm -enable-emscripten-sjlj -mllvm -disable-lsr
--allow-undefined-file=/var/folders/8c/z0mt42s97yz4ts2sxkbt_zv40000gn/T/tmpq3drggh0.undefined
--export-if-defined=main --export-if-defined=__start_em_asm
--export-if-defined=__stop_em_asm --export-if-defined=__start_em_lib_deps
--export-if-defined=__stop_em_lib_deps --export-if-defined=__start_em_js
--export-if-defined=__stop_em_js --export-if-defined=__main_argc_argv
--export=stackSave --export=stackRestore --export=stackAlloc
--export=__wasm_call_ctors --export=__errno_location
--export=__get_temp_ret --export=__set_temp_ret
--export=_emscripten_timeout --export=ntohs --export=htons --export=malloc
--export=emscripten_builtin_memalign --export-table -z stack-size=65536
--initial-memory=16777216 --no-entry --max-memory=16777216
--global-base=1024' failed (returned 1)
make: *** [git-daemon] Error 1
emmake: error: 'make all CXX=em++ CC=emcc NO_REGEX=NeedsStartEnd NO_NSEC=1
NO_APPLE_COMMON_CRYPTO=1 AR=emar CSPRNG_METHOD=getentropy NO_PTHREADS=1
NO_UNIX_SOCKETS=1 NO_PERL=1 NO_GETTEXT=1 NO_PYTHON=1 NO_IPV6=1
RANLIB=emranlib NO_INITGROUPS=1 NO_ICONV=1 -s USE_ZLIB=1' failed (returned
2)
===================
=
On Wednesday, February 8, 2023 at 6:31:19 PM UTC+1 caiiiycuk wrote:
> If you use -s USE_ZLIB=1, then no need to link libz.a manually
>
> ср, 8 февр. 2023 г. в 20:06, Brion Vibber <br...@pobox.com>:
>
>> > emcc: warning: /opt/local/lib/libz.a: archive is missing an index; Use
>> emar when creating libraries to ensure an index is created [-Wemcc]
>> > emcc: warning: /opt/local/lib/libz.a: adding index [-Wemcc]
>> > ...
>> > -L/opt/local/lib
>> > ...
>> > /opt/local/lib/libz.a
>>
>> It looks like you're trying to link a native macOS library? You need to
>> build everything to wasm.
>>
>> -- brion
>>
>> On Wed, Feb 8, 2023 at 9:03 AM Ilya Kantor <ili...@gmail.com> wrote:
>>
>>> Hello,
>>>
>>> I'm building git with emscripten ;)
>>> Not libgit2, but the actual git.
>>>
>>> Everything compiled, but at the linking stage, seems it can't find zlib.
>>>
>>> Here's the command that I use on the (almost unpatched) fork
>>> https://github.com/iliakan/git:
>>>
>>> emmake make all CXX=em++ CC=emcc NO_REGEX=NeedsStartEnd NO_NSEC=1
>>> NO_APPLE_COMMON_CRYPTO=1 AR=emar CSPRNG_METHOD=getentropy NO_PTHREADS=1
>>> NO_UNIX_SOCKETS=1 NO_PERL=1 NO_GETTEXT=1 NO_PYTHON=1 NO_IPV6=1
>>> RANLIB=emranlib NO_INITGROUPS=1 NO_ICONV=1 -s USE_ZLIB=1
>>>
>>> This is the output
>>> ==========================
>>> ...
>>> emcc: warning: /opt/local/lib/libz.a: archive is missing an index; Use
>>> emar when creating libraries to ensure an index is created [-Wemcc]
>>> emcc: warning: /opt/local/lib/libz.a: adding index [-Wemcc]
>>> wasm-ld: error: libgit.a(csum-file.o): undefined symbol: crc32
>>> wasm-ld: error: libgit.a(csum-file.o): undefined symbol: crc32
>>> wasm-ld: error: libgit.a(csum-file.o): undefined symbol: crc32
>>> wasm-ld: error: libgit.a(csum-file.o): undefined symbol: crc32
>>> wasm-ld: error: libgit.a(zlib.o): undefined symbol: inflateInit_
>>> wasm-ld: error: libgit.a(zlib.o): undefined symbol: inflateEnd
>>> wasm-ld: error: libgit.a(zlib.o): undefined symbol: inflate
>>> wasm-ld: error: libgit.a(zlib.o): undefined symbol: deflateInit_
>>> wasm-ld: error: libgit.a(zlib.o): undefined symbol: deflateEnd
>>> wasm-ld: error: libgit.a(zlib.o): undefined symbol: deflateEnd
>>> wasm-ld: error: libgit.a(zlib.o): undefined symbol: deflate
>>> emcc: error: '/opt/local/libexec/llvm-devel/bin/wasm-ld -o
>>> git-daemon.wasm -L/opt/local/lib daemon.o common-main.o libgit.a
>>> xdiff/lib.a reftable/libreftable.a libgit.a /opt/local/lib/libz.a
>>> -L/opt/local/libexec/emscripten/cache/sysroot/lib/wasm32-emscripten -lGL
>>> -lal -lhtml5 -lstubs -lnoexit -lc -ldlmalloc -lcompiler_rt -lc++-noexcept
>>> -lc++abi-noexcept -lsockets -mllvm -combiner-global-alias-analysis=false
>>> -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr
>>> --allow-undefined-file=/var/folders/8c/z0mt42s97yz4ts2sxkbt_zv40000gn/T/tmpnnm6g2pg.undefined
>>>
>>> --export-if-defined=main --export-if-defined=__start_em_asm
>>> --export-if-defined=__stop_em_asm --export-if-defined=__start_em_lib_deps
>>> --export-if-defined=__stop_em_lib_deps --export-if-defined=__start_em_js
>>> --export-if-defined=__stop_em_js --export-if-defined=__main_argc_argv
>>> --export=stackSave --export=stackRestore --export=stackAlloc
>>> --export=__wasm_call_ctors --export=__errno_location
>>> --export=__get_temp_ret --export=__set_temp_ret
>>> --export=_emscripten_timeout --export=ntohs --export=htons --export=malloc
>>> --export=emscripten_builtin_memalign --export-table -z stack-size=65536
>>> --initial-memory=16777216 --no-entry --max-memory=16777216
>>> --global-base=1024' failed (returned 1)
>>> make: *** [git-daemon] Error 1
>>> emmake: error: 'make all CXX=em++ CC=emcc NO_REGEX=NeedsStartEnd
>>> NO_NSEC=1 NO_APPLE_COMMON_CRYPTO=1 AR=emar CSPRNG_METHOD=getentropy
>>> NO_PTHREADS=1 NO_UNIX_SOCKETS=1 NO_PERL=1 NO_GETTEXT=1 NO_PYTHON=1
>>> NO_IPV6=1 RANLIB=emranlib NO_INITGROUPS=1 NO_ICONV=1 -s USE_ZLIB=1' failed
>>> (returned 2)
>>> =====================
>>>
>>> I googled around, tried some solutions, but nothing helped so far.
>>> My host machine is MacOs Ventura.
>>>
>>> As you can see, just adding "-s USE_ZLIB=1" doesn't work.
>>> Please advise, how to solve this?
>>>
>>> --
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>>> .
>>>
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>>
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