f260472f7b
The vendored nedmalloc allocator under compat/nedmalloc/ has been unmaintained upstream for a very long time: the original repository at https://github.com/ned14/nedmalloc received its last commit on July 5, 2014, and was archived (made read-only) by its owner on March 15, 2019. Our copy has been carried forward unchanged ever since. The Git for Windows commit that introduced mimalloc as a replacement on Windows ("mingw: use mimalloc", 2019-06-24, present in the Git for Windows branch thicket but not upstream) already observed at that time that nedmalloc had ceased to see any updates for several years. This came to a head when the Git for Windows SDK upgraded to GCC 16: the `add_segment()` function in `compat/nedmalloc/malloc.c.h` declares `int nfences = 0` and only references it inside an `assert()`, which GCC 16 now flags as `-Wunused-but-set-variable`. Combined with the `-Werror` enabled by `DEVELOPER=1`, this turns into a hard build failure: compat/nedmalloc/malloc.c.h: In function 'add_segment': compat/nedmalloc/malloc.c.h:3897:7: error: variable 'nfences' set but not used [-Werror=unused-but-set-variable=] 3897 | int nfences = 0; | ^~~~~~~ cc1.exe: all warnings being treated as errors The same source built without complaint under GCC 15.2.0; the regression was bisected to the SDK package update at https://github.com/git-for-windows/git-sdk-64/commit/188d93dd455 (`mingw-w64-x86_64-gcc 15.2.0-14 -> 16.1.0-1`), with the failing CI run captured at https://github.com/git-for-windows/git-sdk-64/actions/runs/25244795074. Rather than patch the unmaintained vendored sources to silence the warning, stop opting into nedmalloc altogether on MINGW. The platform allocator is what every non-MINGW build already uses, and a fresh build of git.git's master against a minimal Git for Windows SDK upgraded to GCC 16, with `USE_NED_ALLOCATOR` removed from the MINGW section, completes successfully. The compat/nedmalloc/ subtree itself is left in place to keep this change minimal; nothing in the build links against it any longer, so it can be removed in a follow-up if desired. Assisted-by: Claude Opus 4.7 Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Git - fast, scalable, distributed revision control system
Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals.
Git is an Open Source project covered by the GNU General Public License version 2 (some parts of it are under different licenses, compatible with the GPLv2). It was originally written by Linus Torvalds with help of a group of hackers around the net.
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