X-Git-Url: http://git.xonotic.org/?a=blobdiff_plain;f=Makefile;h=dc49416daa8e60464c2a1812d2fcf42ffb6c15d1;hb=f971f89e1e239a74fd34f9f5369993b25d5432ed;hp=a032e87f53ba176ed64b683ed706bb1f4e1f32de;hpb=5b9e0a62abc5677d5cb49f7bad9a4382d8149e75;p=xonotic%2Fgmqcc.git

diff --git a/Makefile b/Makefile
index a032e87..dc49416 100644
--- a/Makefile
+++ b/Makefile
@@ -1,44 +1,204 @@
-CC ?= clang
-CFLAGS = -MD -Wall -Wextra -pedantic-errors
-LDFLAGS = -lm
+# Compilation options:
+# * LTO       - Link time optimization       [default=0]
+# * ASAN      - Address sanitizer            [default=0]
+# * UBSAN     - Undefined behavior sanitizer [default=0]
+# * DEBUG     - Debug build                  [default=0]
+# * UNUSED    - Remove unused references     [default=1]
+# * SRCDIR    - Out of tree builds           [default=./]
+LTO ?= 0
+ASAN ?= 0
+UBSAN ?= 0
+DEBUG ?= 0
+UNUSED ?= 1
+SRCDIR ?= ./
 
-CSRCS = ansi.c ast.c code.c conout.c fold.c fs.c ftepp.c hash.c intrin.c ir.c lexer.c main.c opts.c parser.c stat.c utf8.c util.c
-TSRCS = ansi.c conout.c fs.c hash.c opts.c stat.c test.c util.c
-VSRCS = ansi.c exec.c fs.c hash.c stat.c util.c
+# Determine if we're building for Windows or not so we can set the right file
+# extensions for the binaries and exclude the testsuite because it doesn't build
+# for that platform.
+ifeq ($(OS),Windows_NT)
+	GMQCC := gmqcc.exe
+	QCVM := qcvm.exe
+else
+	GMQCC := gmqcc
+	QCVM := qcvm
+	TESTSUITE := testsuite
+endif
 
-COBJS = $(CSRCS:.c=.o)
-TOBJS = $(TSRCS:.c=.o)
-VOBJS = $(VSRCS:.c=.o)
+# C++ compiler
+CXX ?= clang++
 
-CDEPS = $(CSRCS:.c=.d)
-TDEPS = $(TSRCS:.c=.d)
-VDEPS = $(VSRCS:.c=.d)
+# Build artifact directories
+OBJDIR := .build/objs
+DEPDIR := .build/deps
 
-CBIN = gmqcc
-TBIN = testsuite
-VBIN = qcvm
+# Collect all the source files for GMQCC.
+GSRCS := ast.cpp
+GSRCS += code.cpp
+GSRCS += conout.cpp
+GSRCS += fold.cpp
+GSRCS += ftepp.cpp
+GSRCS += intrin.cpp
+GSRCS += ir.cpp
+GSRCS += lexer.cpp
+GSRCS += main.cpp
+GSRCS += opts.cpp
+GSRCS += parser.cpp
+GSRCS += stat.cpp
+GSRCS += utf8.cpp
+GSRCS += util.cpp
 
-all: $(CBIN) $(TBIN) $(VBIN)
+# Collect all the source files for QCVM.
+QSRCS := exec.cpp
+QSRCS += stat.cpp
+QSRCS += util.cpp
 
-$(CBIN): $(COBJS)
-	$(CC) $(COBJS) $(LDFLAGS) -o $@
+# Collect all the source files for TESTSUITE.
+TSRCS := conout.cpp
+TSRCS += opts.cpp
+TSRCS += stat.cpp
+TSRCS += test.cpp
+TSRCS += util.cpp
 
-$(TBIN): $(TOBJS)
-	$(CC) $(TOBJS) $(LDFLAGS) -o $@
+#
+# Compilation flags
+#
+CXXFLAGS := -Wall
+CXXFLAGS += -Wextra
+CXXFLAGS += -Wno-parentheses
+CXXFLAGS += -Wno-class-memaccess
+CXXFLAGS += -Wno-implicit-fallthrough
+CXXFLAGS += -std=c++11
 
-$(VBIN): $(VOBJS)
-	$(CC) $(VOBJS) $(LDFLAGS) -o $@
+# Disable some unneeded features.
+CXXFLAGS += -fno-exceptions
+CXXFLAGS += -fno-rtti
+CXXFLAGS += -fno-asynchronous-unwind-tables
 
-.c.o:
-	$(CC) -c $(CFLAGS) $< -o $@
+# Give each function and data it's own section so the linker can remove unused
+# references to each, producing smaller, tighter binaries.
+ifeq ($(UNUSED),1)
+	CXXFLAGS += -ffunction-sections
+	CXXFLAGS += -fdata-sections
+endif
 
-test: $(CBIN) $(TBIN) $(VBIN)
-	@./$(TBIN)
+# Enable link-time optimizations if requested.
+ifeq ($(LTO),1)
+	CXXFLAGS += -flto
+endif
+
+ifeq ($(DEBUG),1)
+	# Ensure there is a frame-pointer in debug builds.
+	CXXFLAGS += -fno-omit-frame-pointer
+
+	# Disable all optimizations in debug builds.
+	CXXFLAGS += -O0
+
+	# Enable debug symbols.
+	CXXFLAGS += -g
+else
+	# Disable all the stack protection features in release builds.
+	CXXFLAGS += -fno-stack-protector
+	CXXFLAGS += -fno-stack-check
+
+	# Disable frame pointer in release builds when AddressSanitizer isn't present.
+	ifeq ($(ASAN),1)
+		CXXFLAGS += -fno-omit-frame-pointer
+	else
+		CXXFLAGS += -fomit-frame-pointer
+	endif
+
+	# Highest optimization flag in release builds.
+	CXXFLAGS += -O3
+endif
+
+# Sanitizer selection
+ifeq ($(ASAN),1)
+	CXXFLAGS += -fsanitize=address
+endif
+ifeq ($(UBSAN),1)
+	CXXFLAGS += -fsanitize=undefined
+endif
+
+#
+# Dependency flags
+#
+DEPFLAGS := -MMD
+DEPFLAGS += -MP
+
+#
+# Linker flags
+#
+LDFLAGS :=
+
+# Remove unreferenced sections
+ifeq ($(UNUSED),1)
+	LDFLAGS += -Wl,--gc-sections
+endif
+
+# Enable link-time optimizations if request.
+ifeq ($(LTO),1)
+	LDFLAGS += -flto
+endif
+
+# Sanitizer selection
+ifeq ($(ASAN),1)
+	LDFLAGS += -fsanitize=address
+endif
+ifeq ($(UBSAN),1)
+	LDFLAGS += -fsanitize=undefined
+endif
+
+# Strip the binaries when not a debug build
+ifneq (,$(findstring, -g,$(CXXFLAGS)))
+	STRIP := true
+else
+	STRIP := strip
+endif
+
+all: $(GMQCC) $(QCVM) $(TESTSUITE)
+
+# Build artifact directories.
+$(DEPDIR):
+	@mkdir -p $(DEPDIR)
+$(OBJDIR):
+	@mkdir -p $(OBJDIR)
+
+$(OBJDIR)/%.o: %.cpp $(DEPDIR)/%.d | $(OBJDIR) $(DEPDIR)
+	$(CXX) -MT $@ $(DEPFLAGS) -MF $(DEPDIR)/$*.Td $(CXXFLAGS) -c -o $@ $<
+	@mv -f $(DEPDIR)/$*.Td $(DEPDIR)/$*.d
+
+$(GMQCC): $(filter %.o,$(GSRCS:%.cpp=$(OBJDIR)/%.o))
+	$(CXX) $^ $(LDFLAGS) -o $@
+	$(STRIP) $@
+
+$(QCVM): $(filter %.o,$(QSRCS:%.cpp=$(OBJDIR)/%.o))
+	$(CXX) $^ $(LDFLAGS) -o $@
+	$(STRIP) $@
+
+$(TESTSUITE): $(filter %.o,$(TSRCS:%.cpp=$(OBJDIR)/%.o))
+	$(CXX) $^ $(LDFLAGS) -o $@
+	$(STRIP) $@
+
+# Determine if the tests should be run.
+RUNTESTS := true
+ifdef TESTSUITE
+	RUNTESTS := ./$(TESTSUITE)
+endif
+
+test: $(QCVM) $(TESTSUITE)
+	@$(RUNTESTS)
 
 clean:
-	rm -f *.d
-	rm -f $(COBJS) $(CDEPS) $(CBIN)
-	rm -f $(TOBJS) $(TDEPS) $(TBIN)
-	rm -f $(VOBJS) $(VDEPS) $(VBIN)
+	rm -rf $(DEPDIR) $(OBJDIR)
+
+.PHONY: test clean $(DEPDIR) $(OBJDIR)
+
+# Dependencies
+$(filter %.d,$(GSRCS:%.cpp=$(DEPDIR)/%.d)):
+include $(wildcard $@)
+
+$(filter %.d,$(QSRCS:%.cpp=$(DEPDIR)/%.d)):
+include $(wildcard $@)
 
--include *.d
+$(filter %.d,$(TSRCS:%.cpp=$(DEPDIR)/%.d)):
+include $(wildcard $@)