facebook
[Aarch64] Remove -fsigned-char flag and fix resulting failure
Remove the -fsigned-char flag for Aarch64 systems. As a result, the unit test zend/good/ext/fileinfo/tests/finfo_file_002.php began failing. Thus, this patch changes a cast to (signed char), and the unit test passes again.
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@aorenste has imported this pull request. If you are a Facebook employee, you can view this diff on Phabricator.
Patch #7361 introduced the -fsigned-char flag and has the backstory for why I am removing it.
Hmmm, I don't think I ever saw that one. Looping in @dave-estes and @apinski-cavium. Have you guys done any more testing w.r.t. signed chars since back then?
As I just commented on the previous PR, the concern about mismatched ABIs is pretty compelling to me, and I think we should make this change; I'm just curious if anyone else has had any problems with it since then.
We've been running with and without signed chars for a while. In light of @apinski-cavium concerns, I think we should go ahead with this change to revert back to signed chars for ARM. If there are any latent bugs in HHVM, then we'll just have to find them.
@dave-estes—I need to do some more testing internally. The CMake build doesn't affect us, but our internal tests stress the system more.
Sorry for putting this off; it didn't seem to be blocking other changes, so I've been punting on it. I'll look into it this week.
@mxw ping.... This patch still applies cleanly for me, can we get it merged?
@Orvid Me too! I can give it another round of testing on AArch64 if needed.
This patch is still clean for AArch64 tests. There are no new failures for test/all with {"","--mode interp","--mode pgo","-r --mode pgo"}.