Support CMake 3.10-3.20

.github/workflows/stable-compilation.yml

@@ -0,0 +1,69 @@
+name: Stable Compilation
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  docker:
+    name: ${{ matrix.image }}
+    runs-on: ubuntu-latest
+    container:
+      image: ${{ matrix.image }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        image:
+          - ubuntu:18.04  # CMake 3.10.2 - g++ 7.4.0  - LTS
+          - debian:10     # CMake 3.13.4 - g++ 8.3.0  - old
+          - ubuntu:20.04  # CMake 3.16.3 - g++ 9.3.0  - LTS
+          - ubuntu:21.04  # CMake 3.18.4 - g++ 10.3.0 - stable
+
+    steps:
+      - name: Cancel Previous Runs
+        uses: styfle/[email protected]
+
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Install ppa for new libfmt
+        if: matrix.image == 'ubuntu:18.04'
+        run: |
+          apt-get update
+          apt-get install -yqq software-properties-common
+          add-apt-repository ppa:team-xbmc/ppa
+
+      - name: Install dependencies
+        run: |
+          export DEBIAN_FRONTEND="noninteractive"
+          apt-get update
+          apt-get install -yqq --no-install-recommends --no-install-suggests \
+            ca-certificates build-essential cmake ninja-build git \
+            libicu-dev libexpat1-dev libsdl2-dev libpng-dev libpixman-1-dev \
+            libfmt-dev libfreetype6-dev libharfbuzz-dev libmpg123-dev \
+            libsndfile-dev libvorbis-dev libopusfile-dev libspeexdsp-dev \
+            libdrm-dev libgbm-dev # only needed for sdl2 on ubuntu 21.04
+
+      - name: Compile
+        run: |
+          mkdir build
+          cd build
+          # cmake < 3.13 does not support '-B'
+          cmake -G Ninja .. \
+            -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr \
+            -DPLAYER_BUILD_LIBLCF=ON
+          cmake --build .
+
+      - name: Install
+        run: |
+          # cmake < 3.16 does not support '--install'
+          cmake --build build --target install
+
+      - name: Test
+        run: cmake --build build --target check

CMakeLists.txt

@@ -1,7 +1,7 @@
-cmake_minimum_required(VERSION 3.7)
-
-if(POLICY CMP0091)
-	cmake_policy(SET CMP0091 NEW) # Support MSVC_RUNTIME_LIBRARY
+cmake_minimum_required(VERSION 3.10...3.20 FATAL_ERROR)
+if(${CMAKE_VERSION} VERSION_LESS 3.12)
+	# Use most recent policies, even for older cmake
+	cmake_policy(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION})
 endif()
 
 project(EasyRPG_Player VERSION 0.6.2 LANGUAGES CXX)

README.md

@@ -105,7 +105,7 @@ https://wiki.easyrpg.org/development/compiling/player/autotools
 Building requirements:
 
 - pkg-config (only on Linux)
-- CMake 3.7 or newer
+- CMake 3.10 or newer
 
 Step-by-step instructions:
 

src/string_view.h

@@ -22,6 +22,11 @@
 #include <lcf/dbstring.h>
 #include <fmt/core.h>
 
+// FIXME: needed to allow building with fmt 5, older versions are untested.
+#if FMT_VERSION < 60000
+#include <fmt/ostream.h>
+#endif
+
 using StringView = lcf::StringView;
 
 using lcf::ToString;