The main focus of this work is resolving issues in the aarch64-w64-mingw32 target related to enabling optimization with -O2, -O3, and LTO, fixing relocations, and adding debugging information.
This patch series is supported by the binutils patch series. https://sourceware.org/pipermail/binutils/2024-August/136481.html The patches included in this series implement and resolve the following areas: 1. Support weak references. 2. Add debugging information. 3. Add minimal C++ support. 4. Exclude symbols using GOT from code models. 5. Resolve relocation and small code model issues. Before the change, the code model could not address more than 1MB due to relocation issues. After the fix, the SMALL code model can address 4GB properly. 6. Fix optimization issues, mostly related to relocation issues. 7. Add LTO support. 8. Support large alignment. 9. Extend the number of tests from 309k to 605k by adding minimal C++ to the target, and improve the pass rate from 72% to 89% with fixes in the patch series targeting armv8 without optional extensions such as SVE. What is next? 1. The patch series 4. Partial or full SEH implementation, variadic functions fixes, call stack support for debugging, bug fixing, and improving unit tests pass rate. 2. The patch series 5. The rest of SEH, C++ exceptions, Boost library unit testing, bug fixing, and improving unit tests pass rate. 3. In terms of the contribution window for GCC 15 it will be great to have architecture target armv8-a in the best quality it can be achieved. The patch series to extend architecture target from armv8-a to "armv8.2-a + sve" might be also prepared before GCC 15 release. However it is unknown yet if it lands in GCC 15 release or in the next development cycle. Thank you for your review! Prepared, refactored and validated by Radek Barton <radek.bar...@microsoft.com> and Evgeny Karpov <evgeny.kar...@microsoft.com> Contributor: Zac Walker <zacwal...@microsoft.com> Special thanks to Linaro, especially Christophe Lyon, for the internal review! Regards, Evgeny
