-CC ?= clang
-CFLAGS = -MD -std=gnu99 -Wall -Wextra -pedantic-errors -g3
-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 $@)
projects / xonotic / gmqcc.git / blobdiff