kc3-lang/libffi

2025-08-02T14:27:51

fix: enable FFI_MMAP_EXEC_WRIT for DragonFly BSD (#930) Similar to PR #265 [1], we need to enable FFI_MMAP_EXEC_WRIT to use explicit write+exec mapping on DragonFly BSD. Without this fix, we were having segfaults with Meld [2]; it would crash with SIGSEGV after 5 diff operations. The crash was caused by it attempting to execute code from non-execute memory region. Moreover, if we set the `machdep.pmap_nx_enable=2` tunable (i.e., strict NX mode), Meld would crash upon the first diff operation. Fix the `configure.ac` script to enable `FFI_MMAP_EXEC_WRIT` for DragonFly BSD. In addition, add it to the supported platforms table. [1] https://github.com/libffi/libffi/pull/265 [2] https://meldmerge.org/