emscripten cross-compile wasm-ld: error: duplicate symbol `_Py_LibHacl_Hacl_Hash_*`

Bug report

Bug description:

For the emscripten build, during building of the python executable, all the LIBHACL_*_LIB_SHARED are used as linker flags, however the LIBHACL_HMAC_LIB_SHARED flag contains objects that are already contained in other LIBHACL_*_LIB_SHARED flags. This happens, because LIBHACL_MD5_OBJS, LIBHACL_SHA1_OBJS, LIBHACL_SHA2_OBJS, LIBHACL_SHA3_OBJS and LIBHACL_BLAKE2_OBJS are all included in LIBHACL_HMAC_LIB_SHARED through LIBHACL_HMAC_OBJS via the Makefile.pre.in file.

The configure script then sets LIBHACL_HMAC_LDFLAGS=LIBHACL_HMAC_LIB_${LIBHACL_LDEPS_LIBTYPE} which for a shared emscripten build leads to duplicate dependencies in the final build command which leads to duplicate symbols.

Since I don't know the purpose of the object file references in the LIBHACL_HMAC_OBJS, I do not feel comfortable just removing them, even though that change fixes the emscripten build.

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

• gh-133043
• gh-133064