userland: add knob for ALL_APPS

The userland sources include a bunch of sample applications. Add an "allapps"
PACKAGECONFIG to allow the user to build the additional optional applications.

Signed-off-by: Trevor Woerner <twoerner@gmail.com>

recipes-graphics/userland/files/0022-all-host_applications-remove-non-existent-projects.patch

@@ -0,0 +1,30 @@
+From 451e8458e45926e4e1c0433864ac4cf8b05d792b Mon Sep 17 00:00:00 2001
+From: Trevor Woerner <twoerner@gmail.com>
+Date: Fri, 27 Nov 2020 03:12:26 -0500
+Subject: [PATCH] all host_applications: remove non-existent projects
+
+The ALL_APPS symbol will optionally build an additional set of projects,
+however, several of them don't exist anymore. Remove them from the list of
+ALL_APPS.
+
+Upstream-status: submitted [https://github.com/raspberrypi/userland/pull/661]
+Signed-off-by: Trevor Woerner <twoerner@gmail.com>
+---
+ host_applications/linux/CMakeLists.txt | 4 ----
+ 1 file changed, 4 deletions(-)
+
+diff --git a/host_applications/linux/CMakeLists.txt b/host_applications/linux/CMakeLists.txt
+index 928b637..554ae46 100644
+--- a/host_applications/linux/CMakeLists.txt
++++ b/host_applications/linux/CMakeLists.txt
+@@ -14,10 +14,6 @@ add_subdirectory(apps/dtoverlay)
+ add_subdirectory(apps/dtmerge)
+ 
+ if(ALL_APPS)
+- add_subdirectory(apps/vcdbg)
+- add_subdirectory(libs/elftoolchain)
+- # add_subdirectory(apps/smct)
+- add_subdirectory(apps/edid_parser)
+  add_subdirectory(apps/hello_pi)
+ endif()
+ 

recipes-graphics/userland/files/0023-hello_pi-optionally-build-wayland-specific-app.patch

@@ -0,0 +1,28 @@
+From 5f4324a0008c2e8e1f511432f98bf85c9fffd35c Mon Sep 17 00:00:00 2001
+From: Trevor Woerner <twoerner@gmail.com>
+Date: Fri, 27 Nov 2020 03:18:50 -0500
+Subject: [PATCH] hello_pi: optionally build wayland-specific app
+
+Only build the wayland-specific hello_pi app when building for wayland.
+
+Upstream-status: inappropriate [the wayland example is not part of upstream]
+Signed-off-by: Trevor Woerner <twoerner@gmail.com>
+---
+ host_applications/linux/apps/hello_pi/CMakeLists.txt | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/host_applications/linux/apps/hello_pi/CMakeLists.txt b/host_applications/linux/apps/hello_pi/CMakeLists.txt
+index 2849fad..7de3265 100644
+--- a/host_applications/linux/apps/hello_pi/CMakeLists.txt
++++ b/host_applications/linux/apps/hello_pi/CMakeLists.txt
+@@ -25,7 +25,9 @@ add_subdirectory(hello_encode)
+ add_subdirectory(hello_jpeg)
+ add_subdirectory(hello_videocube)
+ add_subdirectory(hello_teapot)
+-add_subdirectory(hello_wayland)
++if (BUILD_WAYLAND)
++    add_subdirectory(hello_wayland)
++endif()
+ 
+ if(BUILD_FONT)
+ set(VGFONT_SRCS libs/vgfont/font.c libs/vgfont/vgft.c libs/vgfont/graphics.c)

recipes-graphics/userland/userland_git.bb

@@ -42,6 +42,8 @@ SRC_URI = "\
     file://0019-libfdt-Undefine-__wordsize-if-already-defined.patch \
     file://0020-openmaxil-add-pkg-config-file.patch \
     file://0021-cmake-Disable-format-overflow-warning-as-error.patch \
+    file://0022-all-host_applications-remove-non-existent-projects.patch \
+    file://0023-hello_pi-optionally-build-wayland-specific-app.patch \
 "
 
 SRC_URI_remove_toolchain-clang = "file://0021-cmake-Disable-format-overflow-warning-as-error.patch"
@@ -52,8 +54,10 @@ inherit cmake pkgconfig
 
 ASNEEDED = ""
 
+ALLAPPS = "${@bb.utils.contains('PACKAGECONFIG', 'allapps', '-DALL_APPS=true', '', d)}"
 EXTRA_OECMAKE = "-DCMAKE_BUILD_TYPE=Release -DCMAKE_EXE_LINKER_FLAGS='-Wl,--no-as-needed' \
                  -DVMCS_INSTALL_PREFIX=${exec_prefix} \
+                 ${ALLAPPS} \
 "
 
 EXTRA_OECMAKE_append_aarch64 = " -DARM64=ON "