Creating static libraries for a multi platform project

Hello,
we are developing a mobile game and would like to switch to IXWebSocket for handling socket connections. For this we would need static libraries for the android (armeabi-v7a, arm64-v8a & x86), iOS and mac. We are struggling a bit to compile all these from the project and wondered if we could get some assistance for this case.
The project states it is compatible with android, iOS and mac so would it be possible to get some more detailed instructions for building the project for these platforms? What where the commands/arguments used for compiling libs for these projects by you, the developers?
If all works out I would also be willing to post a PR which includes updates to the README pages for anyone who tries to do the same in the future.

We definitely used a static build of this for android on multiple architectures, but we did use cmake at the time + gradle to drive this.

So far I have been able to build a static lib for the mac target. For android I am using a customised version of the build_android.sh script.

${CMAKE} \
    [path]/IXWebSocket/ \
    -DANDROID_NATIVE_API_LEVEL=23 \
    -DANDROID_ABI=armeabi-v7a \
    -DANDROID_TOOLCHAIN=clang \
    -DANDROID_NDK=${ANDROID_NDK} \
    -G'Unix Makefiles' \
    -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE} \
    -DCMAKE_MAKE_PROGRAM=make \
    -DOPENSSL_ROOT_DIR=/opt/homebrew/bin/openSSL \
    -DOPENSSL_LIBRARIES=/opt/homebrew/bin/openSSL/lib \
    -DUSE_TLS=1 \
    -DUSE_OPEN_SSL=1

But this results in:

-- TLS configured to use openssl
CMake Error at /Applications/CMake.app/Contents/share/cmake-3.26/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
  Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the
  system variable OPENSSL_ROOT_DIR (missing: OPENSSL_CRYPTO_LIBRARY
  OPENSSL_INCLUDE_DIR)
Call Stack (most recent call first):
  /Applications/CMake.app/Contents/share/cmake-3.26/Modules/FindPackageHandleStandardArgs.cmake:600 (_FPHSA_FAILURE_MESSAGE)
  /Applications/CMake.app/Contents/share/cmake-3.26/Modules/FindOpenSSL.cmake:670 (find_package_handle_standard_args)
  CMakeLists.txt:209 (find_package)

Any idea how to fix this?
Also I have yet to try building for iOS. As Ive never done this, I would also be grateful for help/pointers there.
Thank you in advance

I found the thread #175 and it seems to have worked using

${CMAKE} \
    [path]/IXWebSocket/ \
    -DANDROID_NATIVE_API_LEVEL=23 \
    -DANDROID_ABI=armeabi-v7a \
    -DANDROID_TOOLCHAIN=clang \
    -DANDROID_NDK=${ANDROID_NDK} \
    -G'Unix Makefiles' \
    -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE} \
    -DCMAKE_MAKE_PROGRAM=make \
    -DOPENSSL_FOUND=1 \
    -DOPENSSL_INCLUDE_DIR=/opt/homebrew/Cellar/openssl@3/3.4.1/include \
    -DOPENSSL_LIBRARIES="/opt/homebrew/Cellar/openssl@3/3.4.1/lib/libssl.a;/opt/homebrew/Cellar/openssl@3/3.4.1/lib/libcrypto.a" \
    -DUSE_TLS=1 \
    -DUSE_OPEN_SSL=1

Now just iOS is missing

Linking the android libraries seems to be clashing with our android NDK, resulting in the error android-ndk/toolchains/llvm/prebuilt/darwin-x86_64/sysroot/usr/include/bits/fortify/poll.h:59: undefined reference to '__poll_chk'.
Is this simply an error indicating that our android NDK is outdated or would you know more about this?

ChatGPT recommends this, to compile the library with this option

-D_FORTIFY_SOURCE=0

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Creating static libraries for a multi platform project #546

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Creating static libraries for a multi platform project #546

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bsergean commented on Apr 9, 2025

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