removed Doxygen from release build

.circleci/config.yml

@@ -5,5 +5,4 @@ jobs:
       - image: purplekarrot/gcc-8
     steps:
       - checkout
-      - run: apt-get update && apt-get install -y doxygen doxygen-docs doxygen-latex doxygen-gui graphviz
       - run: cd build && cmake -DCMAKE_BUILD_TYPE=Release .. && make -j

.travis.yml

@@ -13,11 +13,6 @@ addons:
         packages:
             - g++-7
             - clang-5.0
-            - doxygen
-            - doxygen-doc
-            - doxygen-latex
-            - doxygen-gui
-            - graphviz
 
 matrix:
   include:
@@ -53,7 +48,6 @@ matrix:
     #     BIN_DIR=bin
     #   before_install:
     #     - brew update
-    #     - brew install doxygen graphviz
     #   install:
     #     brew upgrade cmake
     # - os: osx

CMakeLists.txt

@@ -34,26 +34,6 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG "../debug/")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CXX_COVERAGE_COMPILE_FLAGS}")
 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${CXX_COVERAGE_COMPILE_FLAGS}")
 
-# indicate the doc build as an option, ON by default
-if(CMAKE_BUILD_TYPE MATCHES "^[Rr]elease")
-    option(BUILD_DOC "Build documentation" ON)
-    find_package(Doxygen
-                 REQUIRED dot)
-    if(DOXYGEN_FOUND)
-        set(DOXYGEN_IN ${CMAKE_CURRENT_SOURCE_DIR}/docs/Doxyfile.in)
-        set(DOXYGEN_OUT ${CMAKE_CURRENT_SOURCE_DIR}/docs/Doxyfile)
-        configure_file(${DOXYGEN_IN} ${DOXYGEN_OUT} @ONLY)
-        message("Doxygen build started")
-        add_custom_target(docs ALL
-            COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_OUT}
-            WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-            COMMENT "Generating API documentation with Doxygen"
-            VERBATIM )
-    else()
-        message("Doxygen needs to be installed to generate the doxygen documentation.")
-    endif()
-endif()
-
 include_directories(includes)
 file(GLOB SOURCES "src/*.cc")
 add_executable(${TGT} ${SOURCES})