On Sat, Feb 11, 2023 at 11:12:31AM +0100, Niklas Söderlund wrote:
> Add a configuration time option to disable compilation of the
> v4l2-tracer utility.
>
> Signed-off-by: Niklas Söderlund <niklas.soderlund@xxxxxxxxxxxx>
> ---
>
> Hi Hans,
>
> The v4l2-tracer fails to build on arm32. While I'm sure that can be
> fixed, this is an utility I don't use and building on target any thing I
> can disable in the build saves me time.
>
> From completes, the classes of errors I see are around v4l2_fourcc(),
> _IOR() and _IOWR().
>
> ../../include/linux/videodev2.h:81:66: error: narrowing conversion of '3039908417' from '__u32' {aka 'unsigned int'} to 'long int' [-Wnarrowing]
> 81 | #define v4l2_fourcc_be(a, b, c, d) (v4l2_fourcc(a, b, c, d) | (1U << 31))
>
> ../../include/linux/videodev2.h:2528:34: error: narrowing conversion of '2154321408' from 'unsigned int' to 'long int' [-Wnarrowing]
> 2528 | #define VIDIOC_QUERYCAP _IOR('V', 0, struct v4l2_capability)
>
> ../../include/linux/videodev2.h:2529:33: error: narrowing conversion of '3225441794' from 'unsigned int' to 'long int' [-Wnarrowing]
> 2529 | #define VIDIOC_ENUM_FMT _IOWR('V', 2, struct v4l2_fmtdesc)
>
> I'm building on target with gcc 12.1.0, nothing fancy,
>
> $ ./bootstrap.sh && ./configure && make
>
> Kind Regards
> Niklas
Hi Niklas,
Thanks for this patch it is good and probably how I should have done it
originally :) It does make the "HAVE_JSONC" conditional redundant, so once
this is applied, I will send a follow-up patch to replace "HAVE_JSONC" with
"WITH_V4L2_TRACER" in the v4l2-tracer Makefile.am.
Best,
Deb
> ---
> configure.ac | 11 +++++++++++
> utils/Makefile.am | 2 +-
> 2 files changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/configure.ac b/configure.ac
> index dc9c4af71c45..46ddc7a8b404 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -497,6 +497,14 @@ AC_ARG_ENABLE(v4l2-compliance-32,
> esac]
> )
>
> +AC_ARG_ENABLE(v4l2-tracer,
> + AS_HELP_STRING([--disable-v4l2-tracer], [disable v4l2-tracer compilation]),
> + [case "${enableval}" in
> + yes | no ) ;;
> + *) AC_MSG_ERROR(bad value ${enableval} for --disable-v4l2-tracer) ;;
> + esac]
> +)
> +
> AC_ARG_ENABLE(v4l2-ctl-libv4l,
> AS_HELP_STRING([--disable-v4l2-ctl-libv4l], [disable use of libv4l in v4l2-ctl]),
> [case "${enableval}" in
> @@ -578,6 +586,7 @@ AM_CONDITIONAL([WITH_V4L2_CTL_32], [test x${enable_v4l2_ctl_32} = xyes])
> AM_CONDITIONAL([WITH_V4L2_COMPLIANCE], [test x$ac_cv_func_fork = xyes])
> AM_CONDITIONAL([WITH_V4L2_COMPLIANCE_LIBV4L], [test x$ac_cv_func_fork = xyes -a x${enable_v4l2_compliance_libv4l} != xno])
> AM_CONDITIONAL([WITH_V4L2_COMPLIANCE_32], [test x$ac_cv_func_fork = xyes -a x${enable_v4l2_compliance_32} = xyes])
> +AM_CONDITIONAL([WITH_V4L2_TRACER], [test x$jsonc_pkgconfig = xyes -a x$enable_v4l2_tracer != xno])
> PKG_CHECK_MODULES([LIBBPF], [libbpf >= 0.7], [bpf_pc=yes], [bpf_pc=no])
> AM_CONDITIONAL([WITH_BPF], [test x$enable_bpf != xno -a x$libelf_pkgconfig = xyes -a x$CLANG = xclang -a x$bpf_pc = xyes])
>
> @@ -628,6 +637,7 @@ AM_COND_IF([WITH_V4L2_CTL_32], [USE_V4L2_CTL_32="yes"], [USE_V4L2_CTL_32="no"])
> AM_COND_IF([WITH_V4L2_COMPLIANCE], [USE_V4L2_COMPLIANCE="yes"], [USE_V4L2_COMPLIANCE="no"])
> AM_COND_IF([WITH_V4L2_COMPLIANCE_LIBV4L], [USE_V4L2_COMPLIANCE_LIBV4L="yes"], [USE_V4L2_COMPLIANCE_LIBV4L="no"])
> AM_COND_IF([WITH_V4L2_COMPLIANCE_32], [USE_V4L2_COMPLIANCE_32="yes"], [USE_V4L2_COMPLIANCE_32="no"])
> +AM_COND_IF([WITH_V4L2_TRACER], [USE_V4L2_TRACER="yes"], [USE_V4L2_TRACER="no"])
> AM_COND_IF([WITH_BPF], [USE_BPF="yes"
> AC_DEFINE([HAVE_BPF], [1], [BPF IR decoder support enabled])],
> [USE_BPF="no"])
> @@ -679,5 +689,6 @@ compile time options summary
> v4l2-compliance : $USE_V4L2_COMPLIANCE
> v4l2-compliance uses libv4l: $USE_V4L2_COMPLIANCE_LIBV4L
> v4l2-compliance-32 : $USE_V4L2_COMPLIANCE_32
> + v4l2-tracer : $USE_V4L2_TRACER
> BPF IR Decoders: : $USE_BPF
> EOF
> diff --git a/utils/Makefile.am b/utils/Makefile.am
> index 6f59515ef29d..b2a6ac211473 100644
> --- a/utils/Makefile.am
> +++ b/utils/Makefile.am
> @@ -15,7 +15,7 @@ SUBDIRS = \
> cec-follower \
> rds-ctl
>
> -if HAVE_JSONC
> +if WITH_V4L2_TRACER
> SUBDIRS += \
> v4l2-tracer
> endif
> --
> 2.39.1
>
