Forgot to attach the config.log… Best regards, Jacob Faibussowitsch (Jacob Fai - booss - oh - vitch) > On Nov 17, 2021, at 12:02, Jacob Faibussowitsch wrote: > > Checking my config.log gives: > > configure:20626: checking for posix_spawn > configure:20626: clang -o conftest -O3 -march=native -mtune=native -flto=thin -flto-jobs=5 -std=gnu\ > 17 -Wno-unused-command-line-argument -Wno-unknown-pragmas conftest.c -lpng -ljpeg >&5 > configure:20626: $? = 0 > configure:20626: result: yes > configure:20632: checking for posix_spawn_file_actions_addchdir > configure:20632: clang -o conftest -O3 -march=native -mtune=native -flto=thin -flto-jobs=5 -std=gnu\ > 17 -Wno-unused-command-line-argument -Wno-unknown-pragmas conftest.c -lpng -ljpeg >&5 > undef: _posix_spawn_file_actions_addchdir > Undefined symbols for architecture x86_64: > "_posix_spawn_file_actions_addchdir", referenced from: > _main in 0.x86_64.thinlto.o > ld: symbol(s) not found for architecture x86_64 > clang: error: linker command failed with exit code 1 (use -v to see invocation) > > And the final set of defines for configure includes the following: > > ... > #define HAVE_POSIX_SPAWN 1 > #define HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR_NP 1 > #define HAVE_POSIX_SPAWNATTR_SETFLAGS 1 > #define HAVE_DECL_POSIX_SPAWN_SETSID 1 > ... > configure: exit 0 > > Best regards, > > Jacob Faibussowitsch > (Jacob Fai - booss - oh - vitch) > >> On Nov 17, 2021, at 11:58, Eli Zaretskii > wrote: >> >>> From: Jacob Faibussowitsch > >>> Date: Wed, 17 Nov 2021 11:50:46 -0600 >>> >>> This is by no means breaking or disrupting anything on my end (at least that I can tell), but I did notice in >>> some commit messages a few weeks that someone was attempting to replace vfork with posix_spawn >>> specifically on macOS, so maybe my system is some unhandled corner-case? >> >> That change is already on master. If your build of a recent master >> branch doesn't use the posix_spawn code, the first place to look is in >> config.log, where you should try to find the reason(s) why the >> configure script decided your system doesn't have posix_spawn. >> >> Thanks. >