[PATCH v2 1/5] configure: Check for libv4l2.

[Zebediah Figura]

v4l1 has been deprecated and removed from the kernel for almost a decade.

Signed-off-by: Zebediah Figura <z.figura12 at gmail.com>
---
This patch, notably, does not port the support for mmap(). Devices that
do not support read(), and only support mmap(), can be emulated with libv4l2.
Accordingly this patch requires libv4l2 to read from those devices.

 configure.ac | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/configure.ac b/configure.ac
index ef0a2612ff..31dd472533 100644
--- a/configure.ac
+++ b/configure.ac
@@ -82,6 +82,7 @@ AC_ARG_WITH(sdl,       AS_HELP_STRING([--without-sdl],[do not use SDL]))
 AC_ARG_WITH(tiff,      AS_HELP_STRING([--without-tiff],[do not use TIFF]))
 AC_ARG_WITH(udev,      AS_HELP_STRING([--without-udev],[do not use udev (plug and play support)]))
 AC_ARG_WITH(v4l,       AS_HELP_STRING([--without-v4l],[do not use v4l1 (v4l support)]))
+AC_ARG_WITH(v4l2,      AS_HELP_STRING([--without-v4l2],[do not use v4l2 (video capture)]))
 AC_ARG_WITH(vkd3d,     AS_HELP_STRING([--without-vkd3d],[do not use vkd3d (Direct3D 12 support)]))
 AC_ARG_WITH(vulkan,    AS_HELP_STRING([--without-vulkan],[do not use Vulkan]))
 AC_ARG_WITH(xcomposite,AS_HELP_STRING([--without-xcomposite],[do not use the Xcomposite extension]),
@@ -1425,6 +1426,14 @@ fi
 WINE_NOTICE_WITH(v4l,[test "x$ac_cv_lib_soname_v4l1" = "x"],
                  [libv4l ${notice_platform}development files not found.])
 
+dnl **** Check for libv4l2 ****
+if test "x$with_v4l2" != "xno"
+then
+    WINE_CHECK_SONAME(v4l2,v4l2_open,,,)
+fi
+WINE_NOTICE_WITH(v4l2,[test "x$ac_cv_lib_soname_v4l2" = "x"],
+                 [libv4l2 ${notice_platform}development files not found.])
+
 dnl **** Check for libgphoto2 ****
 if test "x$with_gphoto" != "xno"
 then
-- 
2.21.0