Makefile

   1 #
   2 # Makefile for musl (requires GNU make)
   3 #
   4 # This is how simple every makefile should be...
   5 # No, I take that back - actually most should be less than half this size.
   6 #
   7 # Use config.mak to override any of the following variables.
   8 # Do not make changes here.
   9 #
  10
  11 exec_prefix = /usr/local
  12 bindir = $(exec_prefix)/bin
  13
  14 prefix = /usr/local/musl
  15 includedir = $(prefix)/include
  16 libdir = $(prefix)/lib
  17 syslibdir = /lib
  18
  19 SRCS = $(sort $(wildcard src/*/*.c arch/$(ARCH)/src/*.c))
  20 OBJS = $(SRCS:.c=.o)
  21 LOBJS = $(OBJS:.o=.lo)
  22 GENH = include/bits/alltypes.h
  23 IMPH = src/internal/stdio_impl.h src/internal/pthread_impl.h src/internal/libc.h
  24
  25 LDFLAGS =
  26 LIBCC = -lgcc
  27 CPPFLAGS =
  28 CFLAGS = -Os -pipe
  29 CFLAGS_C99FSE = -std=c99 -ffreestanding -nostdinc
  30
  31 CFLAGS_ALL = $(CFLAGS_C99FSE)
  32 CFLAGS_ALL += -D_XOPEN_SOURCE=700 -I./arch/$(ARCH) -I./src/internal -I./include
  33 CFLAGS_ALL += $(CPPFLAGS) $(CFLAGS)
  34 CFLAGS_ALL_STATIC = $(CFLAGS_ALL)
  35 CFLAGS_ALL_SHARED = $(CFLAGS_ALL) -fPIC -DSHARED
  36
  37 AR      = $(CROSS_COMPILE)ar
  38 RANLIB  = $(CROSS_COMPILE)ranlib
  39 INSTALL = ./tools/install.sh
  40
  41 ARCH_INCLUDES = $(wildcard arch/$(ARCH)/bits/*.h)
  42 ALL_INCLUDES = $(sort $(wildcard include/*.h include/*/*.h) $(GENH) $(ARCH_INCLUDES:arch/$(ARCH)/%=include/%))
  43
  44 EMPTY_LIB_NAMES = m rt pthread crypt util xnet resolv dl
  45 EMPTY_LIBS = $(EMPTY_LIB_NAMES:%=lib/lib%.a)
  46 CRT_LIBS = lib/crt1.o lib/Scrt1.o lib/crti.o lib/crtn.o
  47 STATIC_LIBS = lib/libc.a
  48 SHARED_LIBS = lib/libc.so
  49 TOOL_LIBS = lib/musl-gcc.specs
  50 ALL_LIBS = $(CRT_LIBS) $(STATIC_LIBS) $(SHARED_LIBS) $(EMPTY_LIBS) $(TOOL_LIBS)
  51 ALL_TOOLS = tools/musl-gcc
  52
  53 LDSO_PATHNAME = $(syslibdir)/ld-musl-$(ARCH)$(SUBARCH).so.1
  54
  55 -include config.mak
  56
  57 all: $(ALL_LIBS) $(ALL_TOOLS)
  58
  59 install: install-libs install-headers install-tools
  60
  61 clean:
  62         rm -f crt/*.o
  63         rm -f $(OBJS)
  64         rm -f $(LOBJS)
  65         rm -f $(ALL_LIBS) lib/*.[ao] lib/*.so
  66         rm -f $(ALL_TOOLS)
  67         rm -f $(GENH)
  68         rm -f include/bits
  69
  70 distclean: clean
  71         rm -f config.mak
  72
  73 include/bits:
  74         @test "$(ARCH)" || { echo "Please set ARCH in config.mak before running make." ; exit 1 ; }
  75         ln -sf ../arch/$(ARCH)/bits $@
  76
  77 include/bits/alltypes.h.in: include/bits
  78
  79 include/bits/alltypes.h: include/bits/alltypes.h.in include/alltypes.h.in tools/mkalltypes.sed
  80         sed -f tools/mkalltypes.sed include/bits/alltypes.h.in include/alltypes.h.in > $@
  81
  82 src/ldso/dynlink.lo: arch/$(ARCH)/reloc.h
  83
  84 crt/crt1.o crt/Scrt1.o: $(wildcard arch/$(ARCH)/crt_arch.h)
  85
  86 crt/Scrt1.o: CFLAGS += -fPIC
  87
  88 OPTIMIZE_SRCS = $(wildcard $(OPTIMIZE_GLOBS:%=src/%))
  89 $(OPTIMIZE_SRCS:%.c=%.o) $(OPTIMIZE_SRCS:%.c=%.lo): CFLAGS += -O3
  90
  91 MEMOPS_SRCS = src/string/memcpy.c src/string/memmove.c src/string/memcmp.c src/string/memset.c
  92 $(MEMOPS_SRCS:%.c=%.o) $(MEMOPS_SRCS:%.c=%.lo): CFLAGS += $(CFLAGS_MEMOPS)
  93
  94 # This incantation ensures that changes to any subarch asm files will
  95 # force the corresponding object file to be rebuilt, even if the implicit
  96 # rule below goes indirectly through a .sub file.
  97 define mkasmdep
  98 $(dir $(patsubst %/,%,$(dir $(1))))$(notdir $(1:.s=.o)): $(1)
  99 endef
 100 $(foreach s,$(wildcard src/*/$(ARCH)*/*.s),$(eval $(call mkasmdep,$(s))))
 101
 102 %.o: $(ARCH)$(ASMSUBARCH)/%.sub
 103         $(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $(dir $<)$(shell cat $<)
 104
 105 %.o: $(ARCH)/%.s
 106         $(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<
 107
 108 %.o: %.c $(GENH) $(IMPH)
 109         $(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<
 110
 111 %.lo: $(ARCH)$(ASMSUBARCH)/%.sub
 112         $(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $(dir $<)$(shell cat $<)
 113
 114 %.lo: $(ARCH)/%.s
 115         $(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $<
 116
 117 %.lo: %.c $(GENH) $(IMPH)
 118         $(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $<
 119
 120 lib/libc.so: $(LOBJS)
 121         $(CC) $(CFLAGS_ALL_SHARED) $(LDFLAGS) -nostdlib -shared \
 122         -Wl,-e,_start -Wl,-Bsymbolic-functions \
 123         -o $@ $(LOBJS) $(LIBCC)
 124
 125 lib/libc.a: $(OBJS)
 126         rm -f $@
 127         $(AR) rc $@ $(OBJS)
 128         $(RANLIB) $@
 129
 130 $(EMPTY_LIBS):
 131         rm -f $@
 132         $(AR) rc $@
 133
 134 lib/%.o: crt/%.o
 135         cp $< $@
 136
 137 lib/musl-gcc.specs: tools/musl-gcc.specs.sh config.mak
 138         sh $< "$(includedir)" "$(libdir)" "$(LDSO_PATHNAME)" > $@
 139
 140 tools/musl-gcc: config.mak
 141         printf '#!/bin/sh\nexec "$${REALGCC:-gcc}" "$$@" -specs "%s/musl-gcc.specs"\n' "$(libdir)" > $@
 142         chmod +x $@
 143
 144 $(DESTDIR)$(bindir)/%: tools/%
 145         $(INSTALL) -D $< $@
 146
 147 $(DESTDIR)$(libdir)/%.so: lib/%.so
 148         $(INSTALL) -D -m 755 $< $@
 149
 150 $(DESTDIR)$(libdir)/%: lib/%
 151         $(INSTALL) -D -m 644 $< $@
 152
 153 $(DESTDIR)$(includedir)/bits/%: arch/$(ARCH)/bits/%
 154         $(INSTALL) -D -m 644 $< $@
 155
 156 $(DESTDIR)$(includedir)/%: include/%
 157         $(INSTALL) -D -m 644 $< $@
 158
 159 $(DESTDIR)$(LDSO_PATHNAME): $(DESTDIR)$(libdir)/libc.so
 160         $(INSTALL) -D -l $(libdir)/libc.so $@ || true
 161
 162 install-libs: $(ALL_LIBS:lib/%=$(DESTDIR)$(libdir)/%) $(if $(SHARED_LIBS),$(DESTDIR)$(LDSO_PATHNAME),)
 163
 164 install-headers: $(ALL_INCLUDES:include/%=$(DESTDIR)$(includedir)/%)
 165
 166 install-tools: $(ALL_TOOLS:tools/%=$(DESTDIR)$(bindir)/%)
 167
 168
 169
 170 .PRECIOUS: $(CRT_LIBS:lib/%=crt/%)
 171
 172 .PHONY: all clean install install-libs install-headers install-tools