Makefile.ios

# Makefile fragment for iOS app build
# use ios-deploy to deploy the resulting app
# debugging can be accomplished in Xcode by connecting to running app
# ref: https://vojtastavik.com/2018/10/15/building-ios-app-without-xcode/

# run `xcrun --sdk iphoneos --find clang` to get path to clang
XCODE ?= /Applications/Xcode.app/Contents/Developer
SIM ?= 0
ifneq ($(SIM), 0)
  # SIMSDKROOT and SDKROOT can be set in Makefile.local to avoid running xcrun every time
  SIMSDKROOT ?= $(shell xcrun --sdk iphonesimulator --show-sdk-path)
  SDKROOT = $(SIMSDKROOT)
  ARCH = x86_64
  # no signing id needed for sim; mobileprovision file also not needed
  CODESIGN = /usr/bin/codesign --force --sign - --timestamp=none
  XCENT = ios/Sim.app.xcent
else
  SDKROOT ?= $(shell xcrun --sdk iphoneos --show-sdk-path)
  ARCH = arm64
endif
# := so $(SDKROOT) is only evaluated once
CLANG := $(XCODE)/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -arch $(ARCH) -isysroot $(SDKROOT) -miphoneos-version-min=11.0
# note that we omit --output-partial-info-plist and assume it will not be needed
IBTOOL = XCODE_DEVELOPER_USR_PATH=$(XCODE)/usr $(XCODE)/usr/bin/ibtool --errors --warnings --notices --auto-activate-custom-fonts --target-device iphone --target-device ipad --minimum-deployment-target 11.0 --output-format human-readable-text
ACTOOL = $(XCODE)/usr/bin/actool --output-format human-readable-text --notices --warnings --app-icon AppIcon --compress-pngs --enable-on-demand-resources YES --development-region en --target-device iphone --target-device ipad --minimum-deployment-target 11.0 --platform iphoneos --product-type com.apple.product-type.application
PLISTBUDDY = /usr/libexec/PlistBuddy

CFLAGS = -MMD -Wall -Wshadow
CXX = $(CLANG)
CXXFLAGS = --std=c++14 -fno-rtti -fno-exceptions -Werror=return-type
CC = $(CLANG) -x c
CCFLAGS = --std=c99
MC = $(CLANG) -x objective-c
MFLAGS = -fobjc-arc
# linker
LD = $(CXX)
LDFLAGS =

DEBUG ?= 1
ifneq ($(SIM), 0)
	CFLAGS += -O2 -DNDEBUG
	BUILDDIR = SimDebug
else ifneq ($(DEBUG), 0)
	CFLAGS += -O0 -g
	LDFLAGS += -rdynamic
	BUILDDIR = Debug
else
	CFLAGS += -O2 -DNDEBUG
	BUILDDIR = Release
  LDFLAGS += -dead_strip
endif

# project independent stuff
ifneq ($(TOPDIR),)
	OBJDIR=$(BUILDDIR)/$(TOPDIR)
else
	OBJDIR=$(BUILDDIR)
endif

# include files
INCFLAGS = $(INC:%=-I%) $(INCSYS:%=-isystem%)

# defines
CFLAGS += $(DEFS:%=-D%)

# frameworks
LIBS += $(FRAMEWORKS:%=-framework %)

SRCBASE=$(basename $(SOURCES))
OBJ=$(SRCBASE:%=$(OBJDIR)/%.o)
DEPS=$(SRCBASE:%=$(OBJDIR)/%.d)
TGTDIR=$(BUILDDIR)/$(APPDIR)
TGT=$(TGTDIR)/$(TARGET)
IPA=$(BUILDDIR)/$(TARGET).ipa
# xcent file to be modified
TMPXCENT = $(BUILDDIR)/App.xcent
# interface builder
XIBBASE=$(basename $(XIB))
NIB=$(XIBBASE:%=$(OBJDIR)/%.nib)
# gcc will not create directories, so depend on existence of all directories in output folder
# sort removes duplicates (which cause make error)
BUILDDIRS=$(sort $(dir $(OBJ))) $(TGTDIR)

.PHONY: all ipa clean distclean

all: $(TGT)

ipa: $(IPA)

$(OBJDIR)/%.o: %.cpp
	$(CXX) -c $(CFLAGS) $(CXXFLAGS) $(INCFLAGS) -o $@ $<

$(OBJDIR)/%.o: %.c
	$(CC) -c $(CFLAGS) $(CCFLAGS) $(INCFLAGS) -o $@ $<

$(OBJDIR)/%.o: %.m
	$(MC) -c $(CFLAGS) $(MFLAGS) $(INCFLAGS) -o $@ $<

$(OBJDIR)/%.nib: %.xib
	$(IBTOOL) --module $(TARGET) --compile $@ $<

$(TGT): $(OBJ) $(IOSRES) $(NIB) $(XCENT)
	$(LD) -o $@ $(OBJ) $(LDFLAGS) $(LIBS)
	cp -R $(IOSRES) $(TGTDIR)
	test -z $(XCASSETS) || $(ACTOOL) --export-dependency-info $(OBJDIR)/assetcatalog_dependencies --output-partial-info-plist $(OBJDIR)/assetcatalog_info.plist --compile $(TGTDIR) $(XCASSETS)
	test -z $(NIB) || cp -R $(NIB) $(TGTDIR)
	cp $(PROVISIONING_PROFILE) $(TGTDIR)/embedded.mobileprovision
	cp $(XCENT) $(TMPXCENT)
	$(PLISTBUDDY) $(TMPXCENT) -c "Set :com.apple.developer.team-identifier $(TEAM_ID)"
	$(PLISTBUDDY) $(TMPXCENT) -c "Set :application-identifier $(TEAM_ID).$(BUNDLE_ID)"
	$(PLISTBUDDY) $(TMPXCENT) -c "Add :keychain-access-groups: string $(TEAM_ID).$(BUNDLE_ID)"
	$(PLISTBUDDY) $(TGTDIR)/Info.plist -c "Set :CFBundleIdentifier $(BUNDLE_ID)"
	$(CODESIGN) --entitlements $(TMPXCENT) $(TGTDIR)

$(IPA): $(TGT)
	(cd $(BUILDDIR) && zip -rXm $(TARGET).ipa Payload)

# | (pipe) operator causes make to just check for existence instead of timestamp
$(OBJ): | $(BUILDDIRS)

$(BUILDDIRS):
	mkdir -p $(BUILDDIRS)

clean:
	rm -f $(TGT) $(OBJ) $(DEPS)
	rm -r $(TGTDIR)

distclean:
	rm -rf ./Debug ./Release

# dependency files generated by gcc (-MMD switch) ("-include" ignores file if missing)
-include $(DEPS)