Cmake Revamp (#270)

* Cmake Revamp

I needed to do a variety of things to ensure cxxopts worked well in my own project.

I created a new cmake module to abstract a lot of the logic in the main CMakelists.txt, I think it really assists in the readability of the project. Consequently a lot of logic is now written in functions.

I made a lot of the project options off by default unless the project is being built standalone. As a frequent consumer of cmake libraries this is a huge issue. Since examples, tests, installation, etc. aren't things I expect/desired by default when using libraries.

Co-authored-by: Juan Ramos <juanr0911@gmail.com>

1 files changed, 50 insertions, 32 deletions

diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 1969545..d3467f3 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,35 +1,53 @@
-if (CXXOPTS_BUILD_TESTS)
-    add_executable(options_test main.cpp options.cpp)
-    target_link_libraries(options_test cxxopts)
-    add_test(options options_test)
+# Copyright (c) 2014 Jarryd Beck
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
 
-    # test if the targets are findable from the build directory
-    add_test(find-package-test ${CMAKE_CTEST_COMMAND}
-        -C ${CMAKE_BUILD_TYPE}
-        --build-and-test
-        "${CMAKE_CURRENT_SOURCE_DIR}/find-package-test"
-        "${CMAKE_CURRENT_BINARY_DIR}/find-package-test"
-        --build-generator ${CMAKE_GENERATOR}
-        --build-makeprogram ${CMAKE_MAKE_PROGRAM}
-        --build-options
-        "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
-        "-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
-        "-Dcxxopts_DIR=${PROJECT_BINARY_DIR}"
-    )
+add_executable(options_test main.cpp options.cpp)
+target_link_libraries(options_test cxxopts)
+add_test(options options_test)
 
-    # test if the targets are findable when add_subdirectory is used
-    add_test(add-subdirectory-test ${CMAKE_CTEST_COMMAND}
-        -C ${CMAKE_BUILD_TYPE}
-        --build-and-test
-        "${CMAKE_CURRENT_SOURCE_DIR}/add-subdirectory-test"
-        "${CMAKE_CURRENT_BINARY_DIR}/add-subdirectory-test"
-        --build-generator ${CMAKE_GENERATOR}
-        --build-makeprogram ${CMAKE_MAKE_PROGRAM}
-        --build-options
-        "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
-        "-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
-    )
+# test if the targets are findable from the build directory
+add_test(find-package-test ${CMAKE_CTEST_COMMAND}
+    -C ${CMAKE_BUILD_TYPE}
+    --build-and-test
+    "${CMAKE_CURRENT_SOURCE_DIR}/find-package-test"
+    "${CMAKE_CURRENT_BINARY_DIR}/find-package-test"
+    --build-generator ${CMAKE_GENERATOR}
+    --build-makeprogram ${CMAKE_MAKE_PROGRAM}
+    --build-options
+    "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
+    "-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
+    "-Dcxxopts_DIR=${PROJECT_BINARY_DIR}"
+)
 
-    add_executable(link_test link_a.cpp link_b.cpp)
-    target_link_libraries(link_test cxxopts)
-endif()
+# test if the targets are findable when add_subdirectory is used
+add_test(add-subdirectory-test ${CMAKE_CTEST_COMMAND}
+    -C ${CMAKE_BUILD_TYPE}
+    --build-and-test
+    "${CMAKE_CURRENT_SOURCE_DIR}/add-subdirectory-test"
+    "${CMAKE_CURRENT_BINARY_DIR}/add-subdirectory-test"
+    --build-generator ${CMAKE_GENERATOR}
+    --build-makeprogram ${CMAKE_MAKE_PROGRAM}
+    --build-options
+    "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
+    "-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
+)
+
+add_executable(link_test link_a.cpp link_b.cpp)
+target_link_libraries(link_test cxxopts)