Install libraries with RPATH.

This makes deployment easier, as the install libpath is used to look up
dependent libraries.

1 files changed, 24 insertions, 0 deletions

diff --git a/cmake/MacRpath.cmake b/cmake/MacRpath.cmake
new file mode 100644
index 00000000..ae5429dc
--- /dev/null
+++ b/cmake/MacRpath.cmake
@@ -0,0 +1,24 @@
+# Taken from https://cmake.org/Wiki/CMake_RPATH_handling#Always_full_RPATH.
+#
+# In many cases you will want to make sure that the required libraries are
+# always found independent from LD_LIBRARY_PATH and the install location. Then
+# you can use these settings:
+
+# Use, i.e. don't skip the full RPATH for the build tree.
+set(CMAKE_SKIP_BUILD_RPATH FALSE)
+
+# When building, don't use the install RPATH already
+# (but later on when installing).
+set(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE)
+
+set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
+
+# Add the automatically determined parts of the RPATH
+# which point to directories outside the build tree to the install RPATH.
+set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
+
+# The RPATH to be used when installing, but only if it's not a system directory.
+list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/lib" isSystemDir)
+if("${isSystemDir}" STREQUAL "-1")
+  set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
+endif()