QPID-5646: Detect and build against earlier versions of Proton.

- This should detect any version of Proton that either uses
  pkg-config or native cmake config files.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1582139 13f79535-47bb-0310-9956-ffa450edef68

2 files changed, 63 insertions, 0 deletions

diff --git a/qpid/cpp/CMakeLists.txt b/qpid/cpp/CMakeLists.txt
index 837a71cd44..d057254d45 100644
--- a/qpid/cpp/CMakeLists.txt
+++ b/qpid/cpp/CMakeLists.txt
@@ -29,6 +29,8 @@ else()
     set (OPTIONAL_ARG OPTIONAL)
 endif()
 
+set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/CMakeModules)
+
 # Parse the version from QPID_VERSION.txt.
 # Use the top level qpid/ file if we're in an SVN checkout, source dir otherwise.
 find_file(QPID_VERSION_FILE NAMES QPID_VERSION.txt PATHS ${PROJECT_SOURCE_DIR}/.. ${PROJECT_SOURCE_DIR} NO_DEFAULT_PATH)
diff --git a/qpid/cpp/CMakeModules/FindProton.cmake b/qpid/cpp/CMakeModules/FindProton.cmake
new file mode 100644
index 0000000000..caf836d69a
--- /dev/null
+++ b/qpid/cpp/CMakeModules/FindProton.cmake
@@ -0,0 +1,61 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+#
+
+include(FindPackageHandleStandardArgs)
+include(FindPackageMessage)
+
+# First try to find the Installed Proton config (Proton 0.7 and later)
+find_package(Proton CONFIG QUIET)
+if (Proton_FOUND)
+    find_package_message(Proton "Found Proton: ${Proton_LIBRARIES} (found version \"${Proton_VERSION}\")" "$Proton_DIR ${Proton_LIBRARIES} $Proton_VERSION")
+    return()
+endif ()
+
+# Now look for the cooky Proton config installed with some earlier
+# versions of Proton
+find_package(proton CONFIG QUIET)
+if (proton_FOUND)
+    include("${proton_DIR}/libqpid-proton.cmake")
+    set (Proton_VERSION ${PROTON_VERSION})
+    set (Proton_INCLUDE_DIRS ${PROTON_INCLUDE_DIRS})
+    set (Proton_LIBRARIES ${PROTON_LIBRARIES})
+    set (Proton_FOUND true)
+    find_package_message(Proton "Found Proton: ${Proton_LIBRARIES} (found version \"${Proton_VERSION}\")" "$Proton_DIR ${Proton_LIBRARIES} $Proton_VERSION")
+    return()
+endif ()
+
+# Now look for any pkg-config configuration
+find_package(PkgConfig QUIET)
+
+if (PKG_CONFIG_FOUND)
+    if (NOT Proton_FIND_VERSION)
+        pkg_check_modules(Proton libqpid-proton QUIET)
+    elseif(NOT Proton_FIND_VERSION_EXACT)
+        pkg_check_modules(Proton libqpid-proton>=${Proton_FIND_VERSION} QUIET)
+    else()
+        pkg_check_modules(Proton libqpid-proton=${Proton_FIND_VERSION} QUIET)
+    endif()
+    if (Proton_FOUND)
+        find_package_message(Proton "Found Proton: ${Proton_LIBRARIES} (found version \"${Proton_VERSION}\")" "$Proton_DIR ${Proton_LIBRARIES} $Proton_VERSION")
+        return()
+    endif ()
+endif()
+
+# Proton not found print a standard error message
+find_package_handle_standard_args(Proton CONFIG_MODE)