From 3c185d781ac7a7031397c6651baf046d900efc3a Mon Sep 17 00:00:00 2001
From: su_v <suv-sf@users.sourceforge.net>
Date: Fri, 1 May 2015 05:52:17 +0200
Subject: cmake: Fix osx-related issues with cmake-build

Add new helper function to retrive pkg-config variables in Cmake;
use paths defined as environment variables for builds on
OS X (useful if MacPorts is not installed into default prefix);
check backend of GTK2 on OS X in main cmake file (x11|quartz).

(bzr r14080)
---
 CMakeScripts/HelperFunctions.cmake | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 CMakeScripts/HelperFunctions.cmake

(limited to 'CMakeScripts/HelperFunctions.cmake')

diff --git a/CMakeScripts/HelperFunctions.cmake b/CMakeScripts/HelperFunctions.cmake
new file mode 100644
index 000000000..0e6fff51a
--- /dev/null
+++ b/CMakeScripts/HelperFunctions.cmake
@@ -0,0 +1,19 @@
+# pkg_check_variable() - a function to retrieve pkg-config variables in CMake
+#
+# source: http://bloerg.net/2015/03/06/pkg-config-variables-in-cmake.html
+
+find_package(PkgConfig REQUIRED)
+
+function(pkg_check_variable _pkg _name)
+    string(TOUPPER ${_pkg} _pkg_upper)
+    string(TOUPPER ${_name} _name_upper)
+    string(REPLACE "-" "_" _pkg_upper ${_pkg_upper})
+    string(REPLACE "-" "_" _name_upper ${_name_upper})
+    set(_output_name "${_pkg_upper}_${_name_upper}")
+
+    execute_process(COMMAND ${PKG_CONFIG_EXECUTABLE} --variable=${_name} ${_pkg}
+                    OUTPUT_VARIABLE _pkg_result
+                    OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+    set("${_output_name}" "${_pkg_result}" CACHE STRING "pkg-config variable ${_name} of ${_pkg}")
+endfunction()
-- 
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