Zig Version

0.13.0

Steps to Reproduce and Observed Behavior

When testing the 0.13.0 bump for the zig package on Void Linux, trying to build a package like river 0.3.3 in cross errors when --sysroot <sysroot> is set but --search-prefix /usr is used, instead of --search-prefix <sysroot>/usr:

river_aarch64_do_build.log

Expected Behavior

--search-prefix /usr should work when correct sysroot is provided in --sysroot

IIRC it's recommended to use --search-prefix --libc with prepended paths instead of using --sysroot, and (at least on Linux) it's used by compiler only to pass it to LLD so that it enables cross-compiling mode and doesn't complain about "dynamic linker not found". prefix should be added to the parameter and zig_libc.txt manually before invocation then.
#19044 (comment)

IIRC it's also planned to remove --sysroot option entirely when self-hosted linker replaces lld, because it would serve no purpose.

Smth like this should work:

cat <<- _EOF_ > "zig_libc.txt"
			# Note: they are not prepended by "--sysroot" value, so repeat it here.
			include_dir=${XBPS_CROSS_BASE}/usr/include/
			sys_include_dir=${XBPS_CROSS_BASE}/usr/include/
			crt_dir=${XBPS_CROSS_BASE}/usr/lib/
			# Windows with MSVC only.
			msvc_lib_dir=
			# Windows with MSVC only.
			kernel32_lib_dir=
			# Haiku only.
			gcc_dir=
		_EOF_

--sysroot "${XBPS_CROSS_BASE}/" --search-prefix "${XBPS_CROSS_BASE}/usr/" --libc zig_libc.txt

gentoo/gentoo#37283

Ah okay, we already had zig_libc.txt set up as above. So I understand that prepending the sysroot to search prefix is the correct approach here after all?