# Sample Makefile to build simple project.
#
# This Makefile expect all source files (.c) to be at the same level, in the
-# current working directory.
+# $(SRC_PATH) directory.
+#
+# This Makefile expect all embedded library source files (.c) to be at the same level, in the
+# $(LIBRARY_PATH) directory.
#
# It will automatically generate dependencies, compile all files, and produce a
-# binary using the provided name.
+# binary using the provided name linked against the library if necessary.
#
# Set BINARY_NAME to the name of the binary file to build.
-# Set BUILD_TYPE to either debug or release
+# Set LIBRARY_NAME to the name of the library file to build.
+# The default path for the library code and object is lib.
+# By default the linker will look for $(BINARY_NAME) library name.
+# Set BUILD_TYPE to either debug or release.
#
# Automatic dependencies code from:
# http://make.mad-scientist.net/papers/advanced-auto-dependency-generation/#tldr
-BINARY_NAME=exo1
-BINARY_PATH:=src
-LIBRARY_NAME=libexo1
+BINARY_NAME:=exo1
+SRC_PATH:=src
+LIBRARY_NAME:=lib$(BINARY_NAME)
LIBRARY_PATH:=lib
-BUILD_TYPE=debug
+LDLIBS:=-l$(BINARY_NAME)
+BUILD_TYPE:=debug
+#BUILD_TYPE=release
# ====================================
# DO NOT CHANGE STUFF BEYOND THIS LINE
# ====================================
-all: $(BINARY_NAME) $(BINARY_NAME).dynamic $(BINARY_NAME).static
-
CC=gcc
LD=gcc
AR=ar
WARN_FLAGS = -Wall -Wextra
STD_FLAG = -std=c11
+UNAME := $(shell uname -o)
ifeq ($(BUILD_TYPE),debug)
BUILDDIR := .build/debug
DEBUG_FLAG = -g
STRIP_FLAG =
OPTI_FLAG = -O0
+LTO_SUPPORT = yes
+GOLD_SUPPORT = yes
else
BUILDDIR := .build/release
DEBUG_FLAG =
STRIP_FLAG = -s
OPTI_FLAG = -O3
+LTO_SUPPORT = yes
+GOLD_SUPPORT = yes
endif
-CFLAGS := $(CFLAGS) $(WARN_FLAGS) $(STD_FLAG) $(OPTI_FLAG) $(DEBUG_FLAG)
-LIBCFLAGS := -fPIC $(CFLAGS)
-LDFLAGS := $(LDFLAGS) $(STRIP_FLAG)
-LIBLDFLAGS := -shared $(LDFLAGS)
-STATICLIBLDFLAGS := -static $(LDFLAGS)
-LDLIBS := $(LDLIBS) -L$(LIBRARY_PATH) -l$(BINARY_NAME)
+BINARY_SUFFIX :=
+DLIB_PREFIX :=
+SDLIB_PREFIX :=
+DLIB_SUFFIX := .so
+SLIB_SUFFIX := .a
OBJDIR := $(BUILDDIR)/objs
$(shell mkdir -p $(OBJDIR))
-SRCS=$(wildcard $(BINARY_PATH)/*.c)
+SRCS=$(wildcard $(SRC_PATH)/*.c)
LIBSRCS=$(wildcard $(LIBRARY_PATH)/*.c)
OBJS=$(patsubst %.c,$(OBJDIR)/%.o,$(notdir $(SRCS)))
LIBOBJS=$(patsubst %.c,$(OBJDIR)/%.o,$(notdir $(LIBSRCS)))
DEPFLAGS = -MT $@ -MMD -MP -MF $(DEPDIR)/$(notdir $*).Td
POSTCOMPILE = mv -f $(DEPDIR)/$(notdir $*).Td $(DEPDIR)/$(notdir $*).d
-print:
- @echo $(basename $(notdir $(SRCS)))
- @echo $(notdir $(SRCS))
- @echo $(DEPDIR)/%d
- @echo $(wildcard $(patsubst %,$(DEPDIR)/%.d,$(basename $(SRCS))))
- @echo $(OBJS) $(LIBOBJS)
- @echo $(SRCS) $(LIBSRCS)
- @echo $(POSTCOMPILE)
+ifeq ($(UNAME),Cygwin)
+CYGWIN_DLIBRARY_NAME := $(subst lib,cyg,$(LIBRARY_NAME))
+GOLD_SUPPORT = no
+BINARY_SUFFIX := .exe
+DLIB_SUFFIX := .dll
+CYGWIN_LDLIBS_NOARCHIVE :=
+CYGWIN_LIBLDFLAGS := -Wl,--out-implib=$(LIBRARY_PATH)/$(DLIB_PREFIX)$(LIBRARY_NAME)$(DLIB_SUFFIX).a \
+ -Wl,--export-all-symbols \
+ -Wl,--enable-auto-import
+endif
+
+ifeq ($(LTO_SUPPORT),yes)
+CFLAGS_LTO = -flto -ffat-lto-objects
+LDFLAGS_LTO = -fuse-linker-plugin -flto
+endif
+
+ifeq ($(GOLD_SUPPORT),yes)
+LDFLAGS_GOLD = -fuse-ld=gold
+endif
+
+# Putting header files in the source directory is not the purpose of this INCLUDES_PATH variable
+INCLUDES_PATH := $(INCLUDES_PATH) -I$(LIBRARY_PATH)
+CFLAGS := $(CFLAGS) $(CFLAGS_LTO) $(WARN_FLAGS) $(STD_FLAG) $(OPTI_FLAG) $(DEBUG_FLAG) $(INCLUDES_PATH)
+LIBCFLAGS := -fPIC $(CFLAGS)
+LDFLAGS := $(LDFLAGS) $(LDFLAGS_LTO) $(LDFLAGS_GOLD) $(STRIP_FLAG)
+LIBLDFLAGS := -shared $(LDFLAGS)
+STATICLIBLDFLAGS := -static $(LDFLAGS)
+LDLIBS := $(LDLIBS) -L$(LIBRARY_PATH)
+
+all: $(BINARY_NAME)$(BINARY_SUFFIX) $(BINARY_NAME).dynamic$(BINARY_SUFFIX) $(BINARY_NAME).static$(BINARY_SUFFIX)
-$(LIBRARY_PATH)/$(LIBRARY_NAME).a: $(LIBOBJS)
+$(LIBRARY_PATH)/$(SLIB_PREFIX)$(LIBRARY_NAME)$(SLIB_SUFFIX): $(LIBOBJS)
@echo "[AR StO] $@"
@$(AR) rcs $@ $^
-$(LIBRARY_PATH)/$(LIBRARY_NAME).so: $(LIBOBJS)
+ifeq ($(UNAME),Cygwin)
+$(LIBRARY_PATH)/$(DLIB_PREFIX)$(LIBRARY_NAME)$(DLIB_SUFFIX).a: $(LIBRARY_PATH)/$(DLIB_PREFIX)$(CYGWIN_DLIBRARY_NAME)$(DLIB_SUFFIX)
+$(LIBRARY_PATH)/$(DLIB_PREFIX)$(CYGWIN_DLIBRARY_NAME)$(DLIB_SUFFIX): $(LIBOBJS)
+ @echo "[LD DLL] $@"
+ @$(LD) $(LIBCFLAGS) $(LIBLDFLAGS) $(CYGWIN_LIBLDFLAGS) -Wl,--whole-archive $^ -Wl,--no-whole-archive $(CYGWIN_LDLIBS_NOARCHIVE) -o $@
+else
+$(LIBRARY_PATH)/$(DLIB_PREFIX)$(LIBRARY_NAME)$(DLIB_SUFFIX): $(LIBOBJS)
@echo "[LD ShO] $@"
@$(LD) $(LIBCFLAGS) $(LIBLDFLAGS) $^ -o $@
+endif
-#$(BINARY_NAME): $(OBJS) $(LIBOBJS)
+#$(BINARY_NAME)$(BINARY_SUFFIX): $(OBJS) $(LIBOBJS)
# @echo "[LD ] $@"
# @$(LD) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
-$(BINARY_NAME): $(OBJS) $(LIBRARY_PATH)/$(LIBRARY_NAME).a
+$(BINARY_NAME)$(BINARY_SUFFIX): $(OBJS) $(LIBRARY_PATH)/$(SLIB_PREFIX)$(LIBRARY_NAME)$(SLIB_SUFFIX)
@echo "[LD ] $@"
@$(LD) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
-$(BINARY_NAME).static: $(OBJS) $(LIBRARY_PATH)/$(LIBRARY_NAME).a
+$(BINARY_NAME).static$(BINARY_SUFFIX): $(OBJS) $(LIBRARY_PATH)/$(SLIB_PREFIX)$(LIBRARY_NAME)$(SLIB_SUFFIX)
@echo "[LD ] $@"
@$(LD) $(CFLAGS) $(STATICLIBLDFLAGS) $^ $(LDLIBS) -o $@
-#$(BINARY_NAME).staticlocal: $(OBJS) $(LIBRARY_PATH)/$(LIBRARY_NAME).a
-# @echo "[LD ] $@"
-# @$(LD) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
-
-$(BINARY_NAME).dynamic: $(OBJS) $(LIBRARY_PATH)/$(LIBRARY_NAME).so
+ifeq ($(UNAME),Cygwin)
+$(BINARY_NAME).dynamic$(BINARY_SUFFIX): $(OBJS) $(LIBRARY_PATH)/$(DLIB_PREFIX)$(LIBRARY_NAME)$(DLIB_SUFFIX).a
+else
+$(BINARY_NAME).dynamic$(BINARY_SUFFIX): $(OBJS) $(LIBRARY_PATH)/$(DLIB_PREFIX)$(LIBRARY_NAME)$(DLIB_SUFFIX)
+endif
@echo "[LD ] $@"
@$(LD) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
-$(OBJS): $(SRCS) $(DEPDIR)/%.d
+$(OBJDIR)/%.o: $(SRC_PATH)/%.c $(DEPDIR)/%.d
@echo "[C ] $(notdir $*)"
@$(CC) $(DEPFLAGS) $(CFLAGS) -c $< -o $@
@$(POSTCOMPILE)
include $(wildcard $(patsubst %,$(DEPDIR)/%.d,$(basename $(SRCS))))
-$(LIBOBJS): $(LIBSRCS) $(DEPDIR)/%.d
+$(OBJDIR)/%.o: $(LIBRARY_PATH)/%.c $(DEPDIR)/%.d
@echo "[C ] $(notdir $*)"
@$(CC) $(DEPFLAGS) $(LIBCFLAGS) -c $< -o $@
@$(POSTCOMPILE)
clean:
@echo "[CLN]"
-@rm -r $(BUILDDIR)
- -@rm $(BINARY_NAME)
- -@rm $(BINARY_NAME).static
- -@rm $(BINARY_NAME).dynamic
- -@rm $(LIBRARY_PATH)/$(LIBRARY_NAME).a
- -@rm $(LIBRARY_PATH)/$(LIBRARY_NAME).so
+ -@rm $(BINARY_NAME)$(BINARY_SUFFIX)
+ -@rm $(BINARY_NAME).static$(BINARY_SUFFIX)
+ -@rm $(BINARY_NAME).dynamic$(BINARY_SUFFIX)
+ -@rm $(LIBRARY_PATH)/$(SLIB_PREFIX)$(LIBRARY_NAME)$(SLIB_SUFFIX)
+ifeq ($(UNAME),Cygwin)
+ -@rm $(LIBRARY_PATH)/$(DLIB_PREFIX)$(CYGWIN_DLIBRARY_NAME)$(DLIB_SUFFIX)
+ -@rm $(LIBRARY_PATH)/$(DLIB_PREFIX)$(LIBRARY_NAME)$(DLIB_SUFFIX).a
+else
+ -@rm $(LIBRARY_PATH)/$(DLIB_PREFIX)$(LIBRARY_NAME)$(DLIB_SUFFIX)
+endif
-disassemble: $(BINARY_NAME)
+disassemble: $(BINARY_NAME)$(BINARY_SUFFIX)
objdump -d $< | less
-symbols: $(BINARY_NAME)
+symbols: $(BINARY_NAME)$(BINARY_SUFFIX)
objdump -t $< | sort | less
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