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v4l2: Unset _TIME_BITS in addition to _FILE_OFFSET_BITS

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libcamera fails to build from source in Debian/Ubuntu on 32-bit
architectures under 64-bit time_t (to avoid the 'year 2038
problem'), because its v4l2 module legitimately un-sets
_FILE_OFFSET_BITS for building but this is not allowed without
also unsetting _TIME_BITS.

Having verified that nothing in this module is sensitive to 64-bit
time_t (none of the functions it intercepts handle time), we also
unset _TIME_BITS to allow this to build as before.

Signed-off-by: Steve Langasek <steve.langasek@canonical.com>
Reviewed-by: Dylan Aïssi <dylan.aissi@collabora.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Steve Langasek 2024-03-20 17:58:40 +01:00 • committed by Laurent Pinchart
parent 0fbc801a1d
commit 705601781b
1 changed files with 1 additions and 0 deletions
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src/v4l2/meson.build
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@ -23,6 +23,7 @@ v4l2_compat_cpp_args = [
# file operations, disable transparent large file support. # file operations, disable transparent large file support.
'-U_FILE_OFFSET_BITS', '-U_FILE_OFFSET_BITS',
'-D_FILE_OFFSET_BITS=32', '-D_FILE_OFFSET_BITS=32',
'-U_TIME_BITS',
'-D_LARGEFILE64_SOURCE', '-D_LARGEFILE64_SOURCE',
'-fvisibility=hidden', '-fvisibility=hidden',
] ]