[Buildroot] [git commit] package/libcamera: add explicit dependency on libevent if libevent package to be built

[Yann E. MORIN]

commit: https://git.buildroot.net/buildroot/commit/?id=030baf89fc9467329907abe07c292567e2f05c0f
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master

The cam application requires libevent. Since there's no Kconfig option
for it, cam building ability is checked by meson build system by default.

If libevent is present in the sysroot, cam is built.

The issue is that there's no explicit dependency on libevent in
libcamera package. This means that it is possible for libevent AND
libcamera to be built, but have libcamera be built before libevent.
Meaning that even if all requirements seem to be fulfilled, cam still
won't be enabled in some cases.

This fixes the possible race by expliciting the dependency to libevent
if the libevent package is enabled. Otherwise, explicitly disable cam
building as it's already known that it isn't going to build.

Cc: Quentin Schulz <foss+buildroot at 0leil.net>
Signed-off-by: Quentin Schulz <quentin.schulz at theobroma-systems.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998 at free.fr>
---
 package/libcamera/libcamera.mk | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/package/libcamera/libcamera.mk b/package/libcamera/libcamera.mk
index 41d6a5abef..3f336cb797 100644
--- a/package/libcamera/libcamera.mk
+++ b/package/libcamera/libcamera.mk
@@ -84,6 +84,13 @@ else
 LIBCAMERA_CONF_OPTS += -Dqcam=disabled
 endif
 
+ifeq ($(BR2_PACKAGE_LIBEVENT),y)
+LIBCAMERA_CONF_OPTS += -Dcam=enabled
+LIBCAMERA_DEPENDENCIES += libevent
+else
+LIBCAMERA_CONF_OPTS += -Dcam=disabled
+endif
+
 ifeq ($(BR2_PACKAGE_TIFF),y)
 LIBCAMERA_DEPENDENCIES += tiff
 endif