After the fixes from bug #210068 and bug #225099 it's *almost* possible to build the GTK and WPE ports against uClibc—the Musl fixes also benefited uClibc :) There are a couple of things to fix for uClibc, though.
Created attachment 429702 [details] Patch
Comment on attachment 429702 [details] Patch Unfortunately we're almost guaranteed to have unknown glibc-specific assumptions that will result in incorrect behavior at runtime hidden throughout WebKit. I guess the first step to finding them is to make it build. E.g. one fun problem we used to have was gspawn relied on malloc being async-signal-safe, so subprocess launching would randomly fail with other C libraries , but only if you're sufficiently unlucky. That was eventually fixed in fairly recent versions of glib. Point is: similar problems will be out there....
Committed r278302 (238339@main): <https://commits.webkit.org/238339@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 429702 [details].
<rdar://problem/78711308>
(In reply to Michael Catanzaro from comment #2) > Comment on attachment 429702 [details] > Patch > > Unfortunately we're almost guaranteed to have unknown glibc-specific > assumptions that will result in incorrect behavior at runtime hidden > throughout WebKit. I guess the first step to finding them is to make it > build. > > E.g. one fun problem we used to have was gspawn relied on malloc being > async-signal-safe, so subprocess launching would randomly fail with other C > libraries , but only if you're sufficiently unlucky. That was eventually > fixed in fairly recent versions of glib. Point is: similar problems will be > out there.... While I had *not* done a full run of layout tests with an uClibc build, I did submit this patch to Buildroot and did an ARM64 build which I smoke tested for a while without issues. The recent changes that were done for Musl also helped for uClibc, as a matter of fact, and while it is likely that some tests would fail with an uClibc build, it seems usable in practice. Here's the Buildroot patches needed to have the WPE and GTK ports built with uClibc, for reference: https://patchwork.ozlabs.org/project/buildroot/patch/20210526182416.2798443-1-aperez@igalia.com/ https://patchwork.ozlabs.org/project/buildroot/patch/20210526183839.3062697-1-aperez@igalia.com/ :)