Hello, There is is a bug that occurs intermittently when doing parallel builds of GCC 7.1.0 on macOS 10.13, with Apple’s new APFS filesystem. I reported it to GCC (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81797), but it is looking more and more like a make issue, and I’m trying to debug it or narrow it down. The facts are:
- It occurs about 75% of the time in “make -j4” builds, where rules are executed out of order - It occurs with both make 3.81 and make 4.2.1 - It occurs only if the file system is APFS, but not if the filesystem is HFS+ The notable differences between the two filesystems are: - APFS has timestamp granularity of 1 ns, vs. 1 second for HFS+ - File ordering: “Calling readdir(2) on a directory in APFS returns filenames in hash order, whereas HFS+ returns filenames in lexicographical order.” Are you alreayd aware of such an issue? (a web search and look into the mail archives revealed nothing) How should I go about debugging this further? Thanks for any help, FX _______________________________________________ Bug-make mailing list Bug-make@gnu.org https://lists.gnu.org/mailman/listinfo/bug-make
