fix: build and test on non-Mere hosts (Arch Linux, etc.) #47

jhuntwork commented 2026年04月01日 17:32:26 +02:00

Five fixes for building and running on systems with glibc:

1. Fix var->const for envp in namespace.zig (caught by newer zig
   nightly builds).

2. Prevent vendored curl from auto-detecting host libraries. The
   configure step was finding system nghttp2, brotli, libidn2,
   librtmp, and openldap, then linking against them without
   including them in the final link line. Added explicit --without
   and --disable flags.

3. Prevent vendored libarchive from auto-detecting host libmd.
   On systems with libmd/libbsd installed, configure found BSD
   digest headers (md5.h, sha.h, etc.) and linked against libmd
   for SHA/MD5/RMD160 functions. Added ac_cv overrides to skip
   these header and library checks.

4. Fix EBADF from fchmod on glibc. When opening a directory with
   default options (.{}), zig uses O_PATH which returns a path-only
   fd. fchmod/fchown on O_PATH fds returns EBADF on Linux. On musl
   this was masked because O_PATH may not be set. Fixed all call
   sites that open a directory and then call setPermissions or
   setOwner to use .{ .iterate = true } which avoids O_PATH.

5. Move ld-musl interpreter provision detection outside the
   target_exists check. The detection is name-based (symlink named
   ld-musl-*.so.1 under lib/) and does not need the symlink target
   to resolve on the build host. On glibc systems, the absolute
   target /lib/libc.so does not exist.

Closes #43

Five fixes for building and running on systems with glibc: 1. Fix var->const for envp in namespace.zig (caught by newer zig nightly builds). 2. Prevent vendored curl from auto-detecting host libraries. The configure step was finding system nghttp2, brotli, libidn2, librtmp, and openldap, then linking against them without including them in the final link line. Added explicit --without and --disable flags. 3. Prevent vendored libarchive from auto-detecting host libmd. On systems with libmd/libbsd installed, configure found BSD digest headers (md5.h, sha.h, etc.) and linked against libmd for SHA/MD5/RMD160 functions. Added ac_cv overrides to skip these header and library checks. 4. Fix EBADF from fchmod on glibc. When opening a directory with default options (.{}), zig uses O_PATH which returns a path-only fd. fchmod/fchown on O_PATH fds returns EBADF on Linux. On musl this was masked because O_PATH may not be set. Fixed all call sites that open a directory and then call setPermissions or setOwner to use .{ .iterate = true } which avoids O_PATH. 5. Move ld-musl interpreter provision detection outside the target_exists check. The detection is name-based (symlink named ld-musl-*.so.1 under lib/) and does not need the symlink target to resolve on the build host. On glibc systems, the absolute target /lib/libc.so does not exist. Closes #43