Merge pull request #155 from alicevision/dev/c++14

Switch to c++14

.clang-format

@@ -47,7 +47,7 @@ SpaceInEmptyParentheses: false
 SpacesInContainerLiterals: false
 SpacesInParentheses: false
 SpacesInSquareBrackets: false
-Standard: "c++11"
+Standard: "c++14"
 IncludeCategories:
   - Regex:           '^".*"'
     Priority:        1

CHANGES.md

@@ -18,6 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [1.0.0] - YYYY-MM-DD
 
  - Support for OpenCV 3.4.9 [PR](https://github.com/alicevision/CCTag/pull/121)
+ - Switch to C++14 standard [PR](https://github.com/alicevision/CCTag/pull/155)
 
 
 ## 2019

CMakeLists.txt

@@ -65,9 +65,10 @@ if(MSVC AND CMAKE_GENERATOR MATCHES "Ninja")
   list(APPEND CUDA_NVCC_FLAGS   -Xcompiler ${CCTAG_MVSC_LINKER})
 endif()
 
-set(CMAKE_CXX_STANDARD 11)
+set(CCTAG_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD ${CCTAG_CXX_STANDARD})
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
-set(CMAKE_CUDA_STANDARD 11)
+set(CMAKE_CUDA_STANDARD ${CCTAG_CXX_STANDARD})
 set(CMAKE_CUDA_STANDARD_REQUIRED ON)
 
 
@@ -94,12 +95,6 @@ endif()
 # set the path where we can find the findXXX.cmake
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake")
 
-if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
-  # -Wno-c++11-narrowing to solve "non-type template argument evaluates to -1" error in boost::gil
-  # -Wno-deprecated-register to avoid the noise of some older eigen versions
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-c++11-extensions -Wno-c++11-narrowing -Wno-deprecated-register")
-endif()
-
 if(APPLE)
 
   # avoid the cmake policy warning about @rpath in MacOSX
@@ -186,7 +181,7 @@ if(CCTAG_WITH_CUDA)
   LIST(APPEND CUDA_NVCC_FLAGS ${ARCH_FLAGS})
 
   if(NOT MSVC)
-    set(CUDA_NVCC_FLAGS         "${CUDA_NVCC_FLAGS};-std=c++11")
+    set(CUDA_NVCC_FLAGS         "${CUDA_NVCC_FLAGS};-std=c++${CCTAG_CXX_STANDARD}")
   endif()
   set(CUDA_NVCC_FLAGS         "${CUDA_NVCC_FLAGS};--default-stream;per-thread")
 
@@ -204,6 +199,12 @@ if(CCTAG_WITH_CUDA)
     endif()
   endif()
 
+  # This is needed on windows for the multi-threaded compilation, typically ninja and vcpkg
+  # it avoids the error C1041: cannot open program database, write to the same .PDB file because of concurrent access
+  if(MSVC)
+    list(APPEND CUDA_NVCC_FLAGS "-Xcompiler" "-FS")
+  endif()
+
   if(CCTAG_NVCC_WARNINGS)
     list(APPEND CUDA_NVCC_FLAGS -Xptxas --warn-on-local-memory-usage)
     list(APPEND CUDA_NVCC_FLAGS -Xptxas --warn-on-spills)

INSTALL.md

@@ -6,10 +6,12 @@
 Required tools:
 * CMake >= 3.14 to build the code
 * Git
-* C/C++ compiler (gcc >= 4.6 or visual studio or clang)
+* C/C++ compiler with C++14 support
+    * see here: https://en.cppreference.com/w/cpp/compiler_support 
+    * TLDR gcc >= 5, clang >= 3.4, msvc >= 2017
 
 Optional tool:
-* CUDA >= 7.0 (CUDA 7.5 is currently not recommended (see Note 1))
+* CUDA >= 9.0 
 Note: On Windows, there are compatibility issues to build the GPU part due to conflicts between msvc/nvcc/thrust/eigen/boost.
 
 ### Getting the sources:

README.md

@@ -50,11 +50,18 @@ Running
 -------
 
 Once compiled, you might want to run the CCTag detection on a sample image:
+
 ```bash
 $ build/src/detection -n 3 -i sample/01.png
 ```
 For the library interface, see [ICCTag.hpp](src/cctag/ICCTag.hpp).
 
+Documentation
+-------------
+
+The documentation can be found on the [Read the Docs page](https://cctag.readthedocs.io/en/doc-first/index.html)
+
+
 License
 -------
 

doc/sphinx/source/install/install.rst

@@ -69,11 +69,11 @@ Required tools:
 
 * CMake >= 3.14 to build the code
 * Git
-* C/C++ compiler supporting the C++11 standard (gcc >= 4.6 or visual studio or clang)
+* C/C++ compiler supporting the C++14 standard (gcc >= 5, clang >= 3.4, msvc >= 2017)
 
 Optional tool:
 
-* CUDA >= 7.0 (CUDA 7.5 is currently not recommended)
+* CUDA >= 9.0
 
 
 .. note::

src/applications/CMakeLists.txt

@@ -5,6 +5,9 @@ if(NOT CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)
   include(GNUInstallDirs)
   set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/${CMAKE_SYSTEM_NAME}-${CMAKE_SYSTEM_PROCESSOR}")
   set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/${CMAKE_SYSTEM_NAME}-${CMAKE_SYSTEM_PROCESSOR}")
+
+  set(CMAKE_CXX_STANDARD 14)
+  set(CMAKE_CXX_STANDARD_REQUIRED ON)
 endif()
 
 # if this is used as a stand-alone project we need to tell whether to use PIC
@@ -62,10 +65,6 @@ else()
   message(STATUS "TBB already there")
 endif()
 
-set(CMAKE_CXX_STANDARD 11)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
-
 set(CCTagRegression_cpp
   ./regression/main.cpp
   ./regression/TestLog.cpp