Consistent 'REQUIRED' usage

If 'REQUIRED' used inside 'find_package' there is no need to check '*_FOUND'
variable. And vice versa - if package is not optional then 'REQUIRED' can be
used instead of 'if(NOT *_FOUND) message(FATAL_ERROR)' block.

CMakeLists.txt

@@ -48,11 +48,7 @@ if(MSVC)
   add_definitions(-DBOOST_ALL_DYN_LINK) # Link against the dynamic boost lib - needs to match with the version that find_package finds.
 endif()
 find_package(Boost 1.50.0 COMPONENTS system REQUIRED)
-if(Boost_FOUND)
-  message(STATUS "Boost found at ${Boost_INCLUDE_DIRS}")
-else(Boost_FOUND)
-  message(FATAL_ERROR "Boost not found")
-endif()
+message(STATUS "Boost found at ${Boost_INCLUDE_DIRS}")
 
 set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake)
 find_package(Eigen3 REQUIRED)

doc/CMakeLists.txt

-find_package(Doxygen)
-if(NOT DOXYGEN_FOUND)
-	message(FATAL_ERROR "Doxygen is needed to build the documentation.")
-endif()
+find_package(Doxygen REQUIRED)
 
 set(doxyfile_in ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in)
 set(doxyfile ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)

examples/CMakeLists.txt

@@ -21,11 +21,7 @@ if(MSVC)
 	add_definitions(-DBOOST_ALL_DYN_LINK) # Link against the dynamic boost lib - needs to match with the version that find_package finds.
 endif()
 find_package(Boost 1.50.0 COMPONENTS system filesystem program_options REQUIRED)
-if(Boost_FOUND)
-  message(STATUS "Boost found at ${Boost_INCLUDE_DIRS}")
-else(Boost_FOUND)
-  message(FATAL_ERROR "Boost not found")
-endif()
+message(STATUS "Boost found at ${Boost_INCLUDE_DIRS}")
 
 # Simple model fitting (orthographic camera & shape to landmarks) example:
 add_executable(fit-model-simple fit-model-simple.cpp)

python/CMakeLists.txt

@@ -22,11 +22,7 @@ if(MSVC)
 	add_definitions(-DBOOST_ALL_DYN_LINK) # Link against the dynamic boost lib - needs to match with the version that find_package finds.
 endif()
 find_package(Boost 1.50.0 COMPONENTS system filesystem program_options REQUIRED)
-if(Boost_FOUND)
-  message(STATUS "Boost found at ${Boost_INCLUDE_DIRS}")
-else(Boost_FOUND)
-  message(FATAL_ERROR "Boost not found")
-endif()
+message(STATUS "Boost found at ${Boost_INCLUDE_DIRS}")
 
 pybind11_add_module(python-bindings generate-python-bindings.cpp pybind11_glm.hpp pybind11_opencv.hpp)
 target_link_libraries(python-bindings PRIVATE eos ${OpenCV_LIBS} ${Boost_LIBRARIES})

utils/CMakeLists.txt

@@ -21,11 +21,7 @@ if(MSVC)
 	add_definitions(-DBOOST_ALL_DYN_LINK) # Link against the dynamic boost lib - needs to match with the version that find_package finds.
 endif()
 find_package(Boost 1.50.0 COMPONENTS system filesystem program_options REQUIRED)
-if(Boost_FOUND)
-  message(STATUS "Boost found at ${Boost_INCLUDE_DIRS}")
-else(Boost_FOUND)
-  message(FATAL_ERROR "Boost not found")
-endif()
+message(STATUS "Boost found at ${Boost_INCLUDE_DIRS}")
 
 # Converts a CVSSP .scm Morphable Model to a cereal binary file:
 add_executable(scm-to-cereal scm-to-cereal.cpp)