Merge pull request eclipse-iceoryx#951 from kopernikusauto/iox-#950-e…

…xternal-cpptoml

iox-eclipse-iceoryx#950 Allow cpptoml to be provided externally.

CHANGELOG.md

@@ -16,6 +16,7 @@
 - static memory alternative for std::function[\#391](https://github.com/eclipse-iceoryx/iceoryx/issues/391)
 - Adding support for Helix QAC 2021.1[\#755](https://github.com/eclipse-iceoryx/iceoryx/issues/755) thanks to @toniglandy1
 - Axivion analysis on CI[\#409](https://github.com/eclipse-iceoryx/iceoryx/issues/409)
+- Cpptoml can be provided by an external source[\#951](https://github.com/eclipse-iceoryx/iceoryx/issues/)
 
 **Bugfixes:**
 

iceoryx_meta/build_options.cmake

@@ -27,6 +27,7 @@ option(CCACHE "Use ccache when it's available" ON)
 option(CLANG_TIDY "Execute Clang-Tidy" OFF)
 option(COVERAGE "Build iceoryx with gcov flags" OFF)
 option(DDS_GATEWAY "Builds the iceoryx dds gateway - enables internode communication via dds" OFF)
+option(DOWNLOAD_TOML_LIB "Download cpptoml via the CMake ExternalProject module" ON)
 option(EXAMPLES "Build all iceoryx examples" OFF)
 option(INTROSPECTION "Builds the introspection client which requires the ncurses library with an activated terminfo feature" OFF)
 option(ONE_TO_MANY_ONLY "Restricts communication to 1:n pattern" OFF)
@@ -83,6 +84,7 @@ function(show_config_options)
   message("          CLANG_TIDY...........................: " ${CLANG_TIDY})
   message("          COVERAGE.............................: " ${COVERAGE})
   message("          DDS_GATEWAY..........................: " ${DDS_GATEWAY})
+  message("          DOWNLOAD_TOML_LIB....................: " ${DOWNLOAD_TOML_LIB})
   message("          EXAMPLES.............................: " ${EXAMPLES})
   message("          INTROSPECTION........................: " ${INTROSPECTION})
   message("          ONE_TO_MANY_ONLY ....................: " ${ONE_TO_MANY_ONLY})

iceoryx_posh/CMakeLists.txt

@@ -23,11 +23,14 @@ project(iceoryx_posh VERSION ${IOX_VERSION_STRING})
 find_package(Threads REQUIRED)
 find_package(iceoryx_hoofs REQUIRED)
 
+option(DOWNLOAD_TOML_LIB "Download cpptoml via the CMake ExternalProject module" ON)
 option(TOML_CONFIG "TOML support for RouDi with dynamic configuration" ON)
 option(ONE_TO_MANY_ONLY "Restricts communication to 1:n pattern" OFF)
 
 if(TOML_CONFIG)
-    add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/cmake/cpptoml/ ${CMAKE_BINARY_DIR}/dependencies/posh/cpptoml/prebuild)
+    if (DOWNLOAD_TOML_LIB)
+        add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/cmake/cpptoml/ ${CMAKE_BINARY_DIR}/dependencies/posh/cpptoml/prebuild)
+    endif()
 
     find_package(cpptoml REQUIRED)
 endif()