CI setup (#395)

* Fix truncation warnings.

* CI: GitHub Actions CI setup.

.github/CMakeLists.txt

@@ -0,0 +1,25 @@
+# This build script is not meant for general use, it is for CI use only!
+cmake_minimum_required(VERSION 3.0)
+project(implot)
+
+# Same as Dear ImGui
+set(CMAKE_CXX_STANDARD 11)
+
+file(GLOB SOURCE_CODE ../implot*.*)
+add_library(implot STATIC ${SOURCE_CODE})
+
+if(MSVC)
+    target_compile_options(implot PRIVATE /W4 /WX)
+else()
+    target_compile_options(implot PRIVATE -Wall -Werror -pedantic)
+endif()
+
+if (CMAKE_CXX_COMPILER_ID MATCHES "Clang|GNU" AND DEFINED GCC_ARCH)
+    if ("${GCC_ARCH}" MATCHES "Win32|x86|32")
+        target_compile_options(implot PRIVATE -m32)
+    elseif ("${GCC_ARCH}" MATCHES "Win64|x64|64")
+        target_compile_options(implot PRIVATE -m64)
+    endif ()
+endif ()
+
+target_include_directories(implot PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../imgui)

.github/workflows/build.yml

@@ -0,0 +1,113 @@
+name: build
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  Linux:
+    runs-on: ubuntu-22.04
+
+    strategy:
+      fail-fast: false
+      matrix:
+        build_type:
+          - debug
+          - release
+        compiler:
+          - gcc
+          - clang
+        arch:
+          - x86
+          - x64
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/checkout@v3
+        with:
+          repository: ocornut/imgui
+          path: imgui
+
+      - name: Dependencies
+        run: sudo apt-get install g++-multilib
+
+      - name: Configure
+        run: cmake -DCMAKE_CXX_COMPILER=${{ matrix.compiler }} -DCMAKE_C_COMPILER=${{ matrix.compiler }} -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} -DGCC_ARCH=${{ matrix.arch }} -B cmake-build -S .github
+
+      - name: Build
+        run: cmake --build cmake-build --parallel $(nproc)
+
+
+  MacOS:
+    runs-on: macos-11
+
+    strategy:
+      fail-fast: false
+      matrix:
+        build_type:
+          - debug
+          - release
+        arch:
+          - x86
+          - x64
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/checkout@v3
+        with:
+          repository: ocornut/imgui
+          path: imgui
+
+      - name: Configure
+        shell: bash
+        run: cmake -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} -DGCC_ARCH=${{ matrix.arch }} -B cmake-build -S .github
+
+      - name: Build
+        shell: bash
+        run: cmake --build cmake-build --parallel $(sysctl -n hw.ncpu)
+
+  Windows:
+    runs-on: windows-2022
+
+    strategy:
+      fail-fast: false
+      matrix:
+        build_type:
+          - debug
+          - release
+        arch:
+          - Win32
+          - x64
+        compiler:
+          - msvc
+          - mingw
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/checkout@v3
+        with:
+          repository: ocornut/imgui
+          path: imgui
+
+      - name: Configure (MSVC)
+        if: matrix.compiler == 'msvc'
+        shell: bash
+        run: cmake -G 'Visual Studio 17 2022' -A ${{ matrix.arch }} -B cmake-build -S .github
+
+      - name: Build (MSVC)
+        if: matrix.compiler == 'msvc'
+        shell: bash
+        run: cmake --build cmake-build -- -p:Configuration=${{ matrix.build_type }} -maxcpucount:$NUMBER_OF_PROCESSORS
+
+      - name: Configure (MingW)
+        if: matrix.compiler == 'mingw'
+        shell: bash
+        run: cmake -G 'MinGW Makefiles' -DGCC_ARCH=${{ matrix.arch }} -B cmake-build -S .github
+
+      - name: Build (MingW)
+        if: matrix.compiler == 'mingw'
+        shell: bash
+        run: cmake --build cmake-build --parallel $NUMBER_OF_PROCESSORS