Fix build on FreeBSD

- Make sure CMake always finds absolute paths for Cairo, Pango and GdkPixbuf
- Add forgotten json-c include path to swaymsg/CMakeLists.txt
- Disable -Werror because of assert warnings
- Add correct /proc/pid/file path for FreeBSD
- Use libepoll-shim on FreeBSD
- Only use Linux capabilities on, well, Linux

1 files changed, 4 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b5796168..f55fadae 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -71,6 +71,10 @@ if(Backtrace_FOUND)
         set(SWAY_Backtrace_HEADER "${Backtrace_HEADER}")
 endif()
 
+if (CMAKE_SYSTEM_NAME STREQUAL FreeBSD)
+        find_package(EpollShim REQUIRED)
+endif (CMAKE_SYSTEM_NAME STREQUAL FreeBSD)
+
 include(FeatureSummary)
 include(Manpage)
 include(GNUInstallDirs)