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Build: Move V4L2 detection into its own module

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Improves detection across different platforms (esp. FreeBSD) since system paths are automatically taken into account (this is in contrast to check_include_file).
This commit is contained in:
Peter Keresztes Schmidt
2021-09-07 23:15:40 +02:00
parent 615e3dd76b
commit c83882a4c7
3 changed files with 109 additions and 4 deletions
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8
CMakeLists.txt
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@@ -268,7 +268,6 @@ if(ZM_SYSTEMD OR (IS_DIRECTORY /usr/lib/systemd/system) OR (IS_DIRECTORY /lib/sy
endif()
# System checks
check_include_file("linux/videodev2.h" HAVE_LINUX_VIDEODEV2_H)
check_include_file("execinfo.h" HAVE_EXECINFO_H)
if(HAVE_EXECINFO_H)
check_function_exists("backtrace" HAVE_DECL_BACKTRACE)
@@ -530,15 +529,16 @@ endif()
# Check for V4L header files and enable ZM_HAS_V4L, ZM_HAS_V4L2 accordingly
# Setting to zeros first is required because ZM uses #define for these
find_package(V4L2)
set(ZM_HAS_V4L 0)
set(ZM_HAS_V4L2 0)
if(HAVE_LINUX_VIDEODEV2_H)
if(TARGET V4L2::videodev2)
set(ZM_HAS_V4L 1)
set(ZM_HAS_V4L2 1)
endif()
if(NOT HAVE_LINUX_VIDEODEV2_H)
else()
message(AUTHOR_WARNING "Video 4 Linux headers weren't found - Analog and USB camera support will not be available")
endif()
# Check for PCRE and enable ZM_PCRE accordingly
set(ZM_PCRE 0)
if(HAVE_LIBPCRE AND HAVE_PCRE_H)