Use std::filesystem

miniz expects utf8 on windows now
SDL2 already expected utf8

.github/workflows/test.yaml

@@ -34,6 +34,10 @@ jobs:
         include:
           - os: windows-latest
             shell: msys2 {0}
+          - os: macos-13
+            shell: bash
+            extra_make_args: 'MACOS_DEPLOYMENT_TARGET=10.13'
+            # we now require 10.15 by default, but 10.13 should work with an extra dependency
 
     name: Test ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
@@ -52,6 +56,10 @@ jobs:
       if: ${{ startsWith(matrix.os, 'macos') }}
       run: |
         brew install coreutils SDL2 sdl2_ttf sdl2_image [email protected] googletest
+    - name: Install extra dependencies (brewo)
+      if: ${{ startsWith(matrix.os, 'macos') && contains(matrix.extra_make_args, 'MACOS_DEPLOYMENT_TARGET') }}
+      run: |
+        brew install boost
     - name: Install dependencies (msys2)
       if: ${{ startsWith(matrix.os, 'windows') }}
       uses: msys2/setup-msys2@v2
@@ -74,6 +82,6 @@ jobs:
       with:
         submodules: recursive
     - name: Build DEBUG
-      run: make native CONF=DEBUG -j4
+      run: make native CONF=DEBUG ${{ matrix.extra_make_args }} -j4
     - name: Run tests
-      run: make test CONF=DEBUG
+      run: make test CONF=DEBUG ${{ matrix.extra_make_args }}

Makefile

@@ -2,6 +2,7 @@
 # NOTE: we may use gifdec in the future to support animations
 #       for now we use SDL2_image GIF support only
 CONF ?= RELEASE # make CONF=DEBUG for debug, CONF=DIST for .zip
+MACOS_DEPLOYMENT_TARGET ?= 10.15
 SRC_DIR = src
 TEST_DIR = test
 LIB_DIR = lib
@@ -172,14 +173,27 @@ WIN64_LD_FLAGS = $(LD_FLAGS)
 NIX_LD_FLAGS = $(LD_FLAGS)
 NIX_C_FLAGS = $(C_FLAGS) -DLUA_USE_READLINE -DLUA_USE_LINUX
 NIX_LUA_C_FLAGS = $(LUA_C_FLAGS) -DLUA_USE_READLINE -DLUA_USE_LINUX
+
 ifdef IS_OSX
 BREW_PREFIX := $(shell brew --prefix)
-DEPLOYMENT_TARGET=10.12
+DEPLOYMENT_TARGET = MACOS_DEPLOYMENT_TARGET
+DEPLOYMENT_TARGET_MAJOR := $(shell echo $(DEPLOYMENT_TARGET) | cut -f1 -d.)
+DEPLOYMENT_TARGET_MINOR := $(shell echo $(DEPLOYMENT_TARGET) | cut -f2 -d.)
+# NOTE: on macos before 10.15 we have to use boost::filesystem instead of std::filesystem
+#       This is currently not built automatically. Please open an issue if you really need a build for macos<10.15.
+HAS_STD_FILESYSTEM := $(shell [ $(DEPLOYMENT_TARGET_MAJOR) -gt 10 -o \( $(DEPLOYMENT_TARGET_MAJOR) -eq 10 -a $(DEPLOYMENT_TARGET_MINOR) -ge 15 \) ] && echo true)
 NIX_CPP_FLAGS += -mmacosx-version-min=$(DEPLOYMENT_TARGET) -I$(BREW_PREFIX)/opt/[email protected]/include -I$(BREW_PREFIX)/include
 NIX_LD_FLAGS += -mmacosx-version-min=$(DEPLOYMENT_TARGET) -L$(BREW_PREFIX)/opt/[email protected]/lib -L$(BREW_PREFIX)/lib
 NIX_C_FLAGS += -mmacosx-version-min=$(DEPLOYMENT_TARGET) -I$(BREW_PREFIX)/opt/[email protected]/include -I$(BREW_PREFIX)/include
 NIX_LUA_C_FLAGS += -mmacosx-version-min=$(DEPLOYMENT_TARGET) -I$(BREW_PREFIX)/opt/[email protected]/include -I$(BREW_PREFIX)/include
+else
+HAS_STD_FILESYSTEM ?= true
 endif
+
+ifneq (HAS_STD_FILESYSTEM, true)
+NIX_LD_FLAGS += -lboost_filesystem
+endif
+
 ifeq ($(CONF), DEBUG) # DEBUG
 WINDRES_FLAGS =
 else