Bob Nystrom
3e37778acb
The OS detection now uses `gcc -dumpmachine` directly instead of `$(CC)` to avoid failures when CC is not defined by MSYS. Additionally, when the OS is detected as mingw32, CC is explicitly set to gcc to work around missing cc executable on some MinGW versions.
119 lines
3.3 KiB
Makefile
119 lines
3.3 KiB
Makefile
# Makefile for building a single configuration of Wren. It allows the
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# following variables to be passed to it:
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#
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# MODE - The build mode, "debug" or "release".
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# If omitted, defaults to "release".
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# LANG - The language, "c" or "cpp".
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# If omitted, defaults to "c".
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# ARCH - The processor architecture, "32", "64", or nothing, which indicates
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# the compiler's default.
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# If omitted, defaults to the compiler's default.
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#
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# It builds a static library, shared library, and command-line interpreter for
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# the given configuration. Libraries are built to "lib", and the interpreter
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# is built to "bin".
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#
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# The output file is initially "wren". If in debug mode, "d" is appended to it.
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# If the language is "cpp", then "-cpp" is appended to that. If the
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# architecture is not the default then "-32" or "-64" is appended to that.
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# Then, for the libraries, the correct extension is added.
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# Files.
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HEADERS := include/wren.h $(wildcard src/*.h)
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SOURCES := $(wildcard src/*.c)
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BUILD_DIR := build
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CFLAGS := -Wall -Werror -Wsign-compare -Wtype-limits -Wuninitialized
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# TODO: Add -Wextra.
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# Mode configuration.
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ifeq ($(MODE),debug)
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WREN := wrend
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CFLAGS += -O0 -DDEBUG -g
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BUILD_DIR := $(BUILD_DIR)/debug
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else
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WREN += wren
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CFLAGS += -Os
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BUILD_DIR := $(BUILD_DIR)/release
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endif
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# Language configuration.
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ifeq ($(LANG),cpp)
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WREN := $(WREN)-cpp
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CFLAGS += -std=c++98
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FILE_FLAG := -x c++
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BUILD_DIR := $(BUILD_DIR)-cpp
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else
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CFLAGS += -std=c99
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endif
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# Architecture configuration.
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ifeq ($(ARCH),32)
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CFLAGS += -m32
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WREN := $(WREN)-32
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BUILD_DIR := $(BUILD_DIR)-32
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endif
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ifeq ($(ARCH),64)
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CFLAGS += -m64
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WREN := $(WREN)-64
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BUILD_DIR := $(BUILD_DIR)-64
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endif
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# Some platform-specific workarounds. Note that we use "gcc" explicitly in the
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# call to get the machine name because one of these workarounds deals with $(CC)
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# itself not working.
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OS := $(lastword $(subst -, ,$(shell gcc -dumpmachine)))
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# Don't add -fPIC on Windows since it generates a warning which gets promoted
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# to an error by -Werror.
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ifeq ($(OS),mingw32)
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else ifeq ($(OS),cygwin)
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# Do nothing.
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else
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CFLAGS += -fPIC
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endif
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# MinGW--or at least some versions of it--default CC to "cc" but then don't
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# provide an executable named "cc". Manually point to "gcc" instead.
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ifeq ($(OS),mingw32)
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CC = GCC
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endif
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# Clang on Mac OS X has different flags and a different extension to build a
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# shared library.
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ifneq (,$(findstring darwin,$(OS)))
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SHARED_EXT := dylib
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else
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SHARED_LIB_FLAGS := -Wl,-soname,$@.so
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SHARED_EXT := so
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endif
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# TODO: Simplify this if we mode main.c to a different directory.
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OBJECTS := $(addprefix $(BUILD_DIR)/, $(notdir $(SOURCES:.c=.o)))
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# Don't include main.c in the libraries.
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LIB_OBJECTS := $(subst $(BUILD_DIR)/main.o,,$(OBJECTS))
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# Targets ---------------------------------------------------------------------
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all: prep bin/$(WREN) lib/lib$(WREN).a lib/lib$(WREN).$(SHARED_EXT)
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prep:
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@mkdir -p bin lib $(BUILD_DIR)
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# Command-line interpreter.
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bin/$(WREN): $(OBJECTS)
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$(CC) $(CFLAGS) -Iinclude -o $@ $^ -lm
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# Static library.
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lib/lib$(WREN).a: $(LIB_OBJECTS)
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$(AR) rcu $@ $^
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# Shared library.
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lib/lib$(WREN).$(SHARED_EXT): $(LIB_OBJECTS)
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$(CC) $(CFLAGS) -shared $(SHARED_LIB_FLAGS) -o $@ $^
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# Object files.
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$(BUILD_DIR)/%.o: src/%.c $(HEADERS)
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$(CC) -c $(CFLAGS) -Iinclude -o $@ $(FILE_FLAG) $<
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