From 05d642f69d815a120709c8032b00315cb9a0ee3e Mon Sep 17 00:00:00 2001
From: Gunnar Beutner <gunnar.beutner@netways.de>
Date: Mon, 27 Oct 2014 12:42:57 +0100
Subject: [PATCH] Use system-provided version of YAJL where available

fixes #7454
---
 CMakeLists.txt             |  8 ++++++++
 INSTALL.md                 |  1 +
 cmake/FindYAJL.cmake       | 28 ++++++++++++++++++++++++++++
 debian/control             |  1 +
 lib/base/CMakeLists.txt    |  5 +----
 third-party/CMakeLists.txt |  5 ++++-
 6 files changed, 43 insertions(+), 5 deletions(-)
 create mode 100644 cmake/FindYAJL.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e13d08856..4946db376 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -80,6 +80,14 @@ include_directories(${Boost_INCLUDE_DIRS})
 find_package(OpenSSL REQUIRED)
 include_directories(${OPENSSL_INCLUDE_DIR})
 
+find_package(YAJL)
+
+if(NOT YAJL_FOUND)
+  include_directories(${icinga2_BINARY_DIR}/third-party/yajl/include)
+  link_directories(${icinga2_BINARY_DIR}/third-party/yajl)
+  set(YAJL_LIBRARIES "yajl")
+endif()
+
 include_directories(
   ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/lib
   ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_BINARY_DIR}/lib
diff --git a/INSTALL.md b/INSTALL.md
index a3019fe39..0ee1f828c 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -28,6 +28,7 @@ parentheses):
 * recommended: libexecinfo on FreeBSD
 * optional: MySQL (mysql-devel on RHEL, libmysqlclient-dev on Debian)
 * optional: PostgreSQL (postgresql-devel on RHEL, libpq-dev on Debian)
+* optional: YAJL (yajl-devel on RHEL, libyajl-dev on Debian)
 
 Note: RHEL5 ships an ancient flex version. Updated packages are available for
 example from the repoforge buildtools repository.
diff --git a/cmake/FindYAJL.cmake b/cmake/FindYAJL.cmake
new file mode 100644
index 000000000..b7d773273
--- /dev/null
+++ b/cmake/FindYAJL.cmake
@@ -0,0 +1,28 @@
+# - Try to find libyajl
+# Once done this will define
+#  YAJL_FOUND - System has YAJL
+#  YAJL_INCLUDE_DIRS - The YAJL include directories
+#  YAJL_LIBRARIES - The libraries needed to use YAJL
+#  YAJL_DEFINITIONS - Compiler switches required for using YAJL
+
+find_package(PkgConfig)
+pkg_check_modules(PC_YAJL QUIET yajl)
+set(YAJL_DEFINITIONS ${PC_YAJL_CFLAGS_OTHER})
+
+find_path(YAJL_INCLUDE_DIR yajl/yajl_parse.h
+          HINTS ${PC_YAJL_INCLUDEDIR} ${PC_YAJL_INCLUDE_DIRS}
+          PATH_SUFFIXES libyajl)
+
+find_library(YAJL_LIBRARY NAMES yajl libyajl
+             HINTS ${PC_YAJL_LIBDIR} ${PC_YAJL_LIBRARY_DIRS})
+
+set(YAJL_LIBRARIES ${YAJL_LIBRARY} )
+set(YAJL_INCLUDE_DIRS ${YAJL_INCLUDE_DIR})
+
+include(FindPackageHandleStandardArgs)
+# handle the QUIETLY and REQUIRED arguments and set YAJL_FOUND to TRUE
+# if all listed variables are TRUE
+find_package_handle_standard_args(yajl  DEFAULT_MSG
+                                  YAJL_LIBRARY YAJL_INCLUDE_DIR)
+
+mark_as_advanced(YAJL_INCLUDE_DIR YAJL_LIBRARY)
diff --git a/debian/control b/debian/control
index ba6f639d7..b5817b509 100644
--- a/debian/control
+++ b/debian/control
@@ -19,6 +19,7 @@ Build-Depends: bison,
                libmysqlclient-dev,
                libpq-dev,
                libssl-dev,
+               libyajl-dev,
                make (>= 3.81),
                po-debconf
 Standards-Version: 3.9.5
diff --git a/lib/base/CMakeLists.txt b/lib/base/CMakeLists.txt
index 40a1d7961..5947e73a2 100644
--- a/lib/base/CMakeLists.txt
+++ b/lib/base/CMakeLists.txt
@@ -41,7 +41,7 @@ endif()
 
 add_library(base SHARED ${base_SOURCES})
 
-target_link_libraries(base ${CMAKE_DL_LIBS} ${Boost_LIBRARIES} ${OPENSSL_LIBRARIES} mmatch yajl)
+target_link_libraries(base ${CMAKE_DL_LIBS} ${Boost_LIBRARIES} ${OPENSSL_LIBRARIES} ${YAJL_LIBRARIES} mmatch)
 
 if(HAVE_LIBEXECINFO)
     target_link_libraries(base execinfo)
@@ -56,9 +56,6 @@ link_directories(${icinga2_BINARY_DIR}/third-party/execvpe)
 include_directories(${icinga2_SOURCE_DIR}/third-party/mmatch)
 link_directories(${icinga2_BINARY_DIR}/third-party/mmatch)
 
-include_directories(${icinga2_BINARY_DIR}/third-party/yajl/include)
-link_directories(${icinga2_BINARY_DIR}/third-party/yajl)
-
 if(UNIX OR CYGWIN)
   target_link_libraries(base execvpe)
 endif()
diff --git a/third-party/CMakeLists.txt b/third-party/CMakeLists.txt
index 41fc705c5..dba21182a 100644
--- a/third-party/CMakeLists.txt
+++ b/third-party/CMakeLists.txt
@@ -16,7 +16,10 @@
 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
 
 add_subdirectory(mmatch)
-add_subdirectory(yajl)
+
+if(NOT YAJL_FOUND)
+  add_subdirectory(yajl)
+endif()
 
 if(UNIX OR CYGWIN)
   add_subdirectory(execvpe)