From c24491c2c916220648802e5e711e923c7685ee9d Mon Sep 17 00:00:00 2001
From: Matthias Vogelgesang <matthias.vogelgesang@kit.edu>
Date: Thu, 26 Mar 2015 15:59:22 +0100
Subject: Use pkg-config to determine GI support

---
 cmake/PkgConfigVars.cmake | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 cmake/PkgConfigVars.cmake

(limited to 'cmake')

diff --git a/cmake/PkgConfigVars.cmake b/cmake/PkgConfigVars.cmake
new file mode 100644
index 0000000..f295457
--- /dev/null
+++ b/cmake/PkgConfigVars.cmake
@@ -0,0 +1,30 @@
+# - determine variables defined in pkg-config files
+#
+# Usage:
+#   pkg_check_variable(<PKG_NAME> <VARIABLE_NAME>)
+#
+# Checks for a variable in the given package and translates to a call such as
+# `pkg-config --variable=<VARIABLE_NAME> <PKG_NAME>`. The output is a cached
+# variable named
+#
+#   <PKG_NAME>_<VARIABLE_NAME>
+#
+# Note that both names are uppercased and any dashes replaced by underscores.
+#
+
+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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