From 2fdf13501c7e1bee566953eb776a21ab07fdb033 Mon Sep 17 00:00:00 2001
From: Antenore Gatta <antenore@simbiosi.org>
Date: Fri, 19 Jul 2019 12:18:32 +0200
Subject: Adding a new module that check for the existence of a module

---
 cmake/CheckHasModule.cmake | 47 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 cmake/CheckHasModule.cmake

(limited to 'cmake')

diff --git a/cmake/CheckHasModule.cmake b/cmake/CheckHasModule.cmake
new file mode 100644
index 000000000..df160d034
--- /dev/null
+++ b/cmake/CheckHasModule.cmake
@@ -0,0 +1,47 @@
+# Remmina - The GTK+ Remote Desktop Client
+#
+#   Taken from stackoverflow https://stackoverflow.com/questions/15706318/check-if-cmake-module-exists
+#
+#   This makes use of the fact that if a package configuration file isn't found for VAR, then a cache variable VAR_DIR is set to VAR_DIR-NOTFOUND. So if the package configuration file is found, either this variable isn't defined, or it's set to a valid path (regardless of whether the find_package finds the requested package).
+#
+#   So, if you do
+#
+#   CheckHasModule(Spurious)
+#   CheckHasModule(Threads)
+#   message("\${HAS_MODULE_Spurious} - ${HAS_MODULE_Spurious}")
+#   message("\${HAS_MODULE_Threads} - ${HAS_MODULE_Threads}")
+#
+#   your output should be:
+#
+#       ${HAS_MODULE_Spurious} - FALSE
+#       ${HAS_MODULE_Threads} - TRUE
+#
+#
+#
+# Copyright (C) 2019 Antenore Gatta, Giovanni Panozzo
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor,
+# Boston, MA  02110-1301, USA.
+
+function(CheckHasModule Module)
+  find_package(${Module} QUIET)
+  if(NOT DEFINED ${Module}_DIR)
+    set(HAS_MODULE_${Module} TRUE PARENT_SCOPE)
+  elseif(${Module}_DIR)
+    set(HAS_MODULE_${Module} TRUE PARENT_SCOPE)
+  else()
+    set(HAS_MODULE_${Module} FALSE PARENT_SCOPE)
+  endif()
+endfunction()
-- 
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