From 19f048c615246525f244dacf37835029566cf6af Mon Sep 17 00:00:00 2001
From: theNerd247 <noah.harvey247 gmail>
Date: Sat, 14 May 2016 17:55:45 -0400
Subject: [PATCH] made installing documentation optional

  * fixed bug mentioned in #345 about `make install` giving an error
    when `make doc` isn't called previously
---
 CMakeLists.txt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index acef57a..214e7c3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -328,7 +328,7 @@ else()
 	set(INSTALL_CMAKE_DIR ${LIB_INSTALL_DIR}/cmake/yaml-cpp)
 endif()
 
-file(RELATIVE_PATH REL_INCLUDE_DIR "${INSTALL_CMAKE_DIR}" "${INCLUDE_INSTALL_ROOT_DIR}")
+file(RELATIVE_PATH REL_INCLUDE_DIR "${CMAKE_INSTALL_PREFIX}/${INSTALL_CMAKE_DIR}" "${INCLUDE_INSTALL_ROOT_DIR}")
 set(CONFIG_INCLUDE_DIRS "\${YAML_CPP_CMAKE_DIR}/${REL_INCLUDE_DIR}")
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/yaml-cpp-config.cmake.in
 	"${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/yaml-cpp-config.cmake" @ONLY)
@@ -374,6 +374,7 @@ install(DIRECTORY
 	"${DOC_DIR}/"
 	DESTINATION 
 	"${SHARE_INSTALL_DIR}/doc/yaml-cpp${LIB_SUFFIX}"
+	OPTIONAL
 	PATTERN "${DOC_DIR}/*"
 	)