Building dynamic library libsodium.so for iOS

[FeodorFitsner]

When building libsodium for iOS with ./configure and make I'm getting only static libsodium.a in "lib" folder, but I need a dynamic library libsodium.so as well. Is there a way to build that for iOS? I've tried --disable-static but it didn't work.

[matejvasek]

Maybe related maybe not:
When I was trying to cross-compile on my desktop (Linux amd64) for my e-book reader (Linux arm7) I was getting only the static library libsodium.a too. When I properly set up qemu emulation by setting QEMU_LD_PREFIX to the cross-compiler sysroot it produced also the libsodium.so file. As if the make also executed some binaries produced for arm7 in the process which was obviously problem on amd64.

This can be also seen when running make check.

FAIL: aead_aegis128l
====================

qemu-arm-static: Could not open '/lib/ld-linux.so.3': No such file or directory
FAIL aead_aegis128l (exit status: 255)

EDIT: hmm trying it today I cannot reproduce missing *.so. The *.so file is produced even without emulation set up. However the tests make test do require emulation.

EDIT 2: What about: https://libsodium.gitbook.io/doc/installation#cross-compiling-to-apple-devices ?

[jedisct1]

zig build -Dtarget=arm-linux -Doptimize=ReleaseFast is the easiest way to cross compile to arm-linux.
Individual tests are put in the zig-out/bin directory, that you can run with emulation later if you wish, with ./run.sh.

[matejvasek]

Also have you tried --enable-shared ?

[jedisct1]

Libraries for Apple devices can be created with the ./dist-build/apple-xcframework.sh script. It doesn't do anything special.
The xcframework only includes static libraries, but .dylib files can be found in the libsodium-apple subdirectories.

[FeodorFitsner]

Thanks @jedisct1, studying apple-xcframework.sh helped. I was using --host=arm64-apple-ios triplet and only libsodium.a was built while using --host=arm-apple-darwin23 yields both libsodium.a and libsodium.dylib.