Hello!<\/p>\n
In the first week of Summer of Code I’ve spent my time fixing some dependencies of the Plasma desktop, as well as having learnt a lot regarding tooling and workflow.<\/p>\n
What I’ve accomplished this week is getting the Plasma desktop running, both with X11 and Wayland. For now it’s just a bare bones desktop with Konsole (terminal) and Dolphin (file manager) running. To get most of my glibc applications running under musl I’ve fixed flatpak-builder so that they can be run inside a Flatpak. I do consider Flatpak a workaround and I’ll definitely focus on getting applications ported to run natively on musl later during this project.<\/p>\n
This far all of my patches has been patching build-time errors because they are easier to spot and fix, and I’ve been putting off the run-time bugs for later.<\/p>\n
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I started off with patching dev-util\/flatpak-builder (https:\/\/github.com\/gentoo\/gentoo\/commit\/43e759c25a8e2960d3dff78c6696cb257ebaa39). This was done before the project started but I’ll still mention it here. The problem with this package was that it used the GNU macro TEMP_FAILURE_RETRY, and error() from error.h. Fixing this was just checking via the preprocessor if they were defined and if not, just define an identical replacement.<\/p>\n
The second package was sys-fs\/lvm2. The fix here was similar to flatpak-builder, ie it used GNU extensions not defined in musl. Specifically it had to do with the standard streams being const in musl, but modifiable in glibc<\/a>. As this was a bug that will probably pop up more I added it to Sam’s musl porting guide<\/a>! This has not been upstreamed yet. Spoilers: I also fixed a runtime issue caused by the exact same thing in week 2.<\/p>\n <\/p>\n A more interesting patch was sys-apps\/accountsservice. It uses fgetspent_r to enumerate the shadow file to find users. The problem here is not that fgetspent_r isn’t defined in musl, it’s that enumerating shadow to get a list of users is a wrong thing to do in the first place. To properly fix accountsservice a larger rewrite is needed. After a chat in #musl I got suggestions on how to do that and I’ll do it in the following weeks. For now a simple conditional define for fgetspent_r was added<\/a>, this patch came from Alpine Linux. A rewrite is needed before upstreaming.<\/p>\n <\/p>\n I also patched fakeroot-ng. This package failed to build because __ptrace_request<\/span><\/span> wasn’t defined in musl. The patch for this was just to conditionally typedef it as int.<\/p>\n <\/p>\n https:\/\/git.musl-libc.org\/cgit\/musl\/commit?id=98e688a9da5e7b2925dda17a2d6820dddf1fb28<\/p>\n Freeimage was, similarly to accountsservice, a package where musl found badly written code.<\/p>\n Here the return type is BOOL, which is defined as an integer. But in newer versions of musl<\/a> NULL is defined as nullptr. Because nullptr cannot implicitly convert to int this will break. In earlier versions of musl NULL was defined as 0 and this would work.<\/p>\n <\/p>\n Things that I spotted from my first week that I’ll continue working on are lvm2 (_allocate_memory needs rewrite, removing is fine for now), Baloo (runtime bug), librsvg (weird cargo error) and rewriting accountsservice.<\/p>\n For me librsvg segfaults when built by an unprivileged user and then installed by root. This error is probably related to ld library path according to Sam.<\/p>\n For the “learning part”: I’ve been working with sam, listout and leio this week. Thanks for all the help, nitpicking, and tips!<\/p>\n","protected":false},"excerpt":{"rendered":" Gentoo musl Support Expansion for Qt\/KDE Week 1 Hello! In the first week of Summer of Code I’ve spent my time fixing some dependencies of the Plasma desktop, as well as having learnt a lot regarding tooling and workflow. What … Continue reading
\nsys-apps\/accountsservice [commit<\/a>]<\/h2>\n
\nsys-apps\/fakeroot-ng [upstream, link N\/A]<\/h2>\n
\nmedia-libs\/freeimage [commit<\/a>]<\/h2>\n
static BOOL DLL_CALLCONV
\nSave(FreeImageIO *io, FIBITMAP *dib, fi_handle handle, int page, int flags, void *data) {
\nif(!handle) {
\nreturn NULL;
\n}
\n...<\/code><\/p>\n
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\n* I’ve learnt to submit patches both with pull requests and mailing lists.
\n* With listout getting stuck on librsvg I also learned how to compile Rust programs with debuginfo and how to use gdbserver, rust-gdb and GEF (sam: indeed, it is comfy).
\n* How to format and what info to include in patches, for example GLEP 66.
\n* Using Emacs magit for working with git, ex. squashing commits.<\/p>\n