1 files changed, 39 insertions, 0 deletions
diff --git a/cmake/FindGem.cmake b/cmake/FindGem.cmake
new file mode 100644
index 000000000..11c9c672b
--- /dev/null
+++ b/cmake/FindGem.cmake
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+#=============================================================================
+# Copyright (c) 2019 Harald Sitter <[email protected]>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. The name of the author may not be used to endorse or promote products
+#    derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#=============================================================================
+
+# In this scope it's the dir we are in, in the function scope it will be the
+# caller's dir. So, keep our dir in a var.
+set(FINDGEM_MODULES_DIR ${CMAKE_CURRENT_LIST_DIR})
+
+function(find_gem GEM_NAME)
+    set(GEM_PACKAGE "Gem:${GEM_NAME}")
+
+    configure_file(${FINDGEM_MODULES_DIR}/FindGem.cmake.in Find${GEM_PACKAGE}.cmake @ONLY)
+
+    set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_BINARY_DIR}" ${CMAKE_MODULE_PATH})
+    find_package(${GEM_PACKAGE} ${ARGN})
+endfunction()