Hey all, v4l-utils currently fails to build against musl libc, since musl, and POSIX, both do not define TEMP_FAILURE_RETRY() or strndupa().
This can be fixed with a small patch from https://git.alpinelinux.org/c git/aports/tree/community/v4l-utils/0001-ir-ctl-fixes-for-musl-compile. patch. Please email me back with any questions or concerns about the patch or musl. Thanks, Bjorn Pagen