WIP Add support for cuda

CMakeLists.txt

@@ -1,9 +1,10 @@
-cmake_minimum_required (VERSION 3.25)
+cmake_minimum_required (VERSION 3.27)
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 
 include(Version)
 
+# Setup the project
 project(tinyopt VERSION ${TINYOPT_VERSION}
                 DESCRIPTION "Tinyopt, a lightweight, header only optimization library"
                 LANGUAGES CXX)

cmake/CompilerFlags.cmake

@@ -7,31 +7,40 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON) # generate compile_commands.json for clang
 # Check the C++ compiler, define flags
 if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
   message(STATUS "Using GCC C++ compiler")
-  set(COMPILER_FLAGS -fPIC -Wall -Wextra -Werror -fdiagnostics-color=always ) # -Wconversion
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-fPIC>)
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-Wall>)
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-Wextra>)
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-Werror>)
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-fdiagnostics-color=always>)
+  # TODO -Wconversion
 elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
   message(STATUS "Using Clang C++ compiler")
-  set(COMPILER_FLAGS -fPIC -Wall -Wextra -Werror -fcolor-diagnostics)
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-fPIC>)
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-Wall>)
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-Wextra>)
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-Werror>)
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-fcolor-diagnostics>)
 elseif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
   message(STATUS "Using MSVC C++ compiler")
-  set(COMPILER_FLAGS /W3 /wd5054) # 5054 is for Eigen, TODO:/WX ?
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/W3>)
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/wd5054>) # 5054 is for Eigen
+  # TODO /WX
 else()
   message(STATUS "Unknown C++ compiler: ${CMAKE_CXX_COMPILER_ID}")
 endif()
-# Add the compiler flags
-add_compile_options(${COMPILER_FLAGS})
 
 # ASAN with ConfigType Address Sanitizer (use -DCMAKE_BUILD_TYPE=ASAN)
 list(APPEND CMAKE_CONFIGURATION_TYPES ASAN)
 
 if(CMAKE_BUILD_TYPE MATCHES "ASAN")
-  add_compile_options("-fsanitize=address")
-  add_compile_options("-fsanitize-address-use-after-scope")
-  add_compile_options("-fno-optimize-sibling-calls")
-  add_compile_options("-fno-omit-frame-pointer")
-  add_compile_options("-O1")
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-fsanitize=address>)
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-fsanitize-address-use-after-scope>)
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-fno-optimize-sibling-calls>)
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-fno-omit-frame-pointer>)
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-O1>)
   link_libraries("-fsanitize=address")
 elseif(CMAKE_BUILD_TYPE MATCHES "RelWithDebInfo")
-  add_compile_options("-O2")
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-O2>)
 elseif(CMAKE_BUILD_TYPE MATCHES "Release")
-  add_compile_options("-O3")
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-O3>)
 endif()

cmake/Options.cmake

@@ -4,6 +4,9 @@ option(TINYOPT_USE_FMT "Use fmt formatting" OFF)
 
 option(TINYOPT_ENABLE_FORMATTERS "Enable definion of std::formatter for streamable types, linked to TINYOPT_NO_FORMATTERS" ON)
 
+# 3rd parties
+option(TINYOPT_USE_CUDA "Use Cuda solvers" OFF)
+
 # Build Options.
 ## Disable these to speed-up compilation if not needed
 option(TINYOPT_DISABLE_AUTODIFF "Disable Automatic Differentiation in Optimizers" OFF)

cmake/ThirdParties.cmake

@@ -38,7 +38,21 @@ if (TINYOPT_USE_FMT)
   add_definitions(-DHAS_FMT)
 endif ()
 
+# CUDA
+if (TINYOPT_USE_CUDA)
+  # Tell CMake to enable the CUDA language on an existing project.
+  # This is a robust way to add a language conditionally.
+  enable_language(CUDA)
 
+  # Check if the CUDA language was successfully enabled.
+  #if(NOT CMAKE_CUDA_COMPILER_WORKS)
+  #    message(FATAL_ERROR "Could not find a working CUDA compiler! Set TINYOPT_USE_CUDA=OFF to build without CUDA.")
+  #endif()
+
+  #set(THIRDPARTY_LIBS ${THIRDPARTY_LIBS} CUDA::cudart)
+endif ()
+
+# Ceres (for testing)
 if (TINYOPT_BUILD_CERES)
   find_package(Ceres)
   if (NOT Ceres_FOUND)

include/tinyopt/formatters.h

@@ -23,7 +23,7 @@
 
 #include <tinyopt/traits.h>
 
-#if __cplusplus >= 202002L
+#if (__cplusplus >= 202002L) && __has_include(<format>)
 
 template <typename T>
 struct TINYOPT_FORMAT_NS::formatter<

include/tinyopt/log.h

@@ -27,7 +27,7 @@
 #define TINYOPT_LOG(...) fmt::print(__VA_ARGS__);
 #define TINYOPT_FORMAT_NS fmt
 
-#elif __cplusplus >= 202002L
+#elif (__cplusplus >= 202002L) && __has_include(<format>)
 
 #include <format>