Using -I/usr/include during the crosstool-ng build of libstdc++ pulled
in host x86_64 headers where int64_t is long long, contaminating the
aarch64 cross-build where int64_t should be long. This caused linker
errors for std::__atomic_futex_unsigned_base symbols due to mismatched
C++ name mangling between headers and the built library.
Copy only the required sys/sdt.h headers into /opt/ct-ng-includes and
point CT_CC_GCC_ENABLE_CXX_FLAGS there instead, matching the approach
used by manylinux_2_28-aarch64.
AlmaLinux 9 doesn't package qemu-user-static, so the Dockerfile
downloads the static binary as /usr/bin/qemu-aarch64-static.
The Toolchain.cmake was incorrectly referencing /usr/bin/qemu-aarch64.
Remove CACHE STRING "" from CMAKE_FIND_ROOT_PATH_MODE_PROGRAM,
CMAKE_FIND_ROOT_PATH_MODE_LIBRARY, and CMAKE_FIND_ROOT_PATH_MODE_INCLUDE
to be consistent with all other cross-compilation toolchain files.
New Docker image for building manylinux_2_34 compatible wheels targeting
64-bit ARM (aarch64) architecture.
- Based on AlmaLinux 9 with crosstool-ng 1.27.0 toolchain
- Uses multiarch/qemu-user-static for cross-compilation emulation
- Includes wheel repair script for manylinux compliance
- GCC configured with --disable-gcov (Bug 100289 workaround)
Julian Oes