cmake: add detection of pthreads, gcrypt

1 files changed, 51 insertions, 0 deletions

diff --git a/cmake/FindOptionalPackage.cmake b/cmake/FindOptionalPackage.cmake
new file mode 100644
index 000000000..3e543bdc4
--- /dev/null
+++ b/cmake/FindOptionalPackage.cmake
@@ -0,0 +1,51 @@
+# - FindOptionalPackage
+# Enable or disable optional packages. Also force optional packages.
+#
+#  This module defines the following macros:
+#    find_required_package   : find a required package, can not be disabled
+#    find_suggested_package  : find a suggested package - required but can be disabled
+#    find_optional_package   : find an optional package - required only if enabled
+#
+
+#=============================================================================
+# Copyright 2011 Nils Andresen <nils@nils-andresen.de>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#=============================================================================
+
+macro(find_required_package _normal_package)
+	find_package(${_normal_package} REQUIRED)
+endmacro(find_required_package)
+
+macro(find_suggested_package _normal_package)
+	string(TOUPPER ${_normal_package} _upper_package)
+	option(WITH_${_upper_package} "Add dependency to ${_normal_package} - recommended" ON)
+	
+	if(WITH_${_upper_package})
+		message(STATUS "Finding suggested package ${_normal_package}.")
+		message(STATUS "  Disable this using \"-DWITH_${_upper_package}=OFF\".")
+		find_package(${_normal_package} REQUIRED)
+	endif(WITH_${_upper_package})
+endmacro(find_suggested_package)
+
+macro(find_optional_package _normal_package)
+	string(TOUPPER ${_normal_package} _upper_package)
+	option(WITH_${_upper_package} "Add dependency to ${_normal_package}" OFF)
+
+	if(WITH_${_upper_package})
+		find_package(${_normal_package} REQUIRED)
+	else(WITH_${_upper_package})
+		message(STATUS "Skipping optional package ${_normal_package}.")
+		message(STATUS "  Enable this using \"-DWITH_${_upper_package}=ON\".")
+	endif(WITH_${_upper_package})
+endmacro(find_optional_package)