chore: C++17 compatibility (#98)

* feat: C++17 compatibility

* Apply suggestions from code review

Co-authored-by: kyle-cochran <[email protected]>

---------

Co-authored-by: kyle-cochran <[email protected]>

CMakeLists.txt

@@ -21,6 +21,7 @@ OPTION (BUILD_PYTHON_BINDINGS "Build Python bindings." ON)
 OPTION (BUILD_CODE_COVERAGE "Build code coverage" OFF)
 OPTION (BUILD_DOCUMENTATION "Build documentation" OFF)
 OPTION (BUILD_WITH_DEBUG_SYMBOLS "Build with debug symbols" ON)
+OPTION (BUILD_WITH_CXX_17 "Build with C++ 17 support." OFF)
 
 ## Setup
 
@@ -126,9 +127,44 @@ IF (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
 
 ENDIF ()
 
-### C++ 20 support
+### C++ 17/20 support
+
+IF (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+
+    IF (BUILD_WITH_CXX_17)
+
+        SET (CMAKE_CXX_STANDARD 17)
+
+        MESSAGE (STATUS "C++17 support enabled")
+
+        IF (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.0)
+
+            MESSAGE (FATAL_ERROR "GCC version must be at least 7.0 to build with C++17")
+
+        ENDIF ()
+
+    ELSE ()
+
+        MESSAGE (STATUS "C++20 support enabled")
+
+        SET (CMAKE_CXX_STANDARD 20)
+
+        IF (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 13.0)
+
+            MESSAGE (FATAL_ERROR "GCC version must be at least 13.0 to build with C++20")
+
+        ENDIF ()
+
+    ENDIF ()
+
+    SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wpedantic -Wshadow -Wno-deprecated")
+
+ELSE ()
+
+    SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wpedantic -Wshadow")
+
+ENDIF ()
 
-SET (CMAKE_CXX_STANDARD 20)
 SET (CMAKE_CXX_STANDARD_REQUIRED ON)
 SET (CMAKE_CXX_EXTENSIONS OFF)
 

docker/development/Dockerfile

@@ -16,6 +16,20 @@ RUN apt-get update \
     && apt-get install -y jq \
     && rm -rf /var/lib/apt/lists/*
 
+## fmt
+
+ARG FMT_VERSION="5.2.0"
+
+RUN cd /tmp \
+    && git clone --branch ${FMT_VERSION} --depth 1 https://github.com/fmtlib/fmt.git \
+    && cd fmt \
+    && mkdir build \
+    && cd build \
+    && cmake -DCMAKE_POSITION_INDEPENDENT_CODE=TRUE .. \
+    && make --silent -j $(nproc) \
+    && make install \
+    && rm -rf /tmp/fmt
+
 ## libcurl
 
 RUN apt-get update -y \