From 7fbe9ba34f31f2271b27abfdfceaab4983d3c740 Mon Sep 17 00:00:00 2001
From: Loki <loki@fakeemail.com>
Date: Sat, 4 Sep 2021 20:15:08 +0200
Subject: [PATCH] Added warning if only one of libcap or libdrm has been found

---
 CMakeLists.txt                      | 9 +++++++--
 sunshine/platform/linux/kmsgrab.cpp | 3 ++-
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 07bf8ea6..8ff42e7a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -137,7 +137,12 @@ else()
 		list(APPEND PLATFORM_LIBRARIES ${LIBDRM_LIBRARIES} ${LIBCAP_LIBRARIES})
 		list(APPEND PLATFORM_TARGET_FILES sunshine/platform/linux/kmsgrab.cpp)
 		list(APPEND SUNSHINE_DEFINITIONS EGL_NO_X11=1)
+	elseif(LIBDRM_FOUND)
+		message(WARNING "Found libdrm, yet there is no libcap")
+	elseif(LIBDRM_FOUND)
+		message(WARNING "Found libcap, yet there is no libdrm")
 	endif()
+
 	if(WAYLAND_FOUND)
 		add_compile_definitions(SUNSHINE_BUILD_WAYLAND)
 		macro(genWayland FILENAME)
@@ -175,8 +180,8 @@ else()
 			sunshine/platform/linux/wlgrab.cpp
 			sunshine/platform/linux/wayland.cpp)
 	endif()
-	if(NOT ${X11_FOUND} AND NOT ${LIBDRM_FOUND} AND NOT ${WAYLAND_FOUND})
-		message(FATAL_ERROR "Couldn't find either x11, wayland or libdrm")
+	if(NOT ${X11_FOUND} AND NOT (${LIBDRM_FOUND} AND ${LIBCAP_FOUND}) AND NOT ${WAYLAND_FOUND})
+		message(FATAL_ERROR "Couldn't find either x11, wayland or (libdrm and libcap)")
 	endif()
 
 	list(APPEND PLATFORM_TARGET_FILES
diff --git a/sunshine/platform/linux/kmsgrab.cpp b/sunshine/platform/linux/kmsgrab.cpp
index fab989a7..08668c92 100644
--- a/sunshine/platform/linux/kmsgrab.cpp
+++ b/sunshine/platform/linux/kmsgrab.cpp
@@ -1,10 +1,10 @@
 #include <drm_fourcc.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <sys/capability.h>
 #include <unistd.h>
 #include <xf86drm.h>
 #include <xf86drmMode.h>
-#include <sys/capability.h>
 
 #include <filesystem>
 
@@ -30,6 +30,7 @@ class cap_sys_admin {
 public:
   cap_sys_admin() {
     caps = cap_get_proc();
+
     cap_value_t sys_admin = CAP_SYS_ADMIN;
     if(cap_set_flag(caps, CAP_EFFECTIVE, 1, &sys_admin, CAP_SET) || cap_set_proc(caps)) {
       BOOST_LOG(error) << "Failed to gain CAP_SYS_ADMIN";