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
  40 ALL_INCLUDES = $(sort $(wildcard include/*.h include/*/*.h) $(GENH))
  41
  42 EMPTY_LIB_NAMES = m rt pthread crypt util xnet resolv dl
  43 EMPTY_LIBS = $(EMPTY_LIB_NAMES:%=lib/lib%.a)
  44 CRT_LIBS = lib/crt1.o lib/Scrt1.o lib/crti.o lib/crtn.o
  45 STATIC_LIBS = lib/libc.a
  46 SHARED_LIBS = lib/libc.so
  47 TOOL_LIBS = lib/musl-gcc.specs
  48 ALL_LIBS = $(CRT_LIBS) $(STATIC_LIBS) $(SHARED_LIBS) $(EMPTY_LIBS) $(TOOL_LIBS)
  49 ALL_TOOLS = tools/musl-gcc
  50
  51 LDSO_PATHNAME = $(syslibdir)/ld-musl-$(ARCH).so.1
  52
  53 -include config.mak
  54
  55 all: $(ALL_LIBS) $(ALL_TOOLS)
  56
  57 install: install-libs install-headers install-tools
  58
  59 clean:
  60         rm -f crt/*.o
  61         rm -f $(OBJS)
  62         rm -f $(LOBJS)
  63         rm -f $(ALL_LIBS) lib/*.[ao] lib/*.so
  64         rm -f $(ALL_TOOLS)
  65         rm -f $(GENH)
  66         rm -f include/bits
  67
  68 distclean: clean
  69         rm -f config.mak
  70
  71 include/bits:
  72         @test "$(ARCH)" || { echo "Please set ARCH in config.mak before running make." ; exit 1 ; }
  73         ln -sf ../arch/$(ARCH)/bits $@
  74
  75 include/bits/alltypes.h.sh: include/bits
  76
  77 include/bits/alltypes.h: include/bits/alltypes.h.sh
  78         sh $< > $@
  79
  80 src/ldso/dynlink.lo: arch/$(ARCH)/reloc.h
  81
  82 %.o: $(ARCH)/%.s
  83         $(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<
  84
  85 %.o: %.c $(GENH) $(IMPH)
  86         $(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<
  87
  88 %.lo: $(ARCH)/%.s
  89         $(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $<
  90
  91 %.lo: %.c $(GENH) $(IMPH)
  92         $(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $<
  93
  94 lib/libc.so: $(LOBJS)
  95         $(CC) $(CFLAGS_ALL_SHARED) $(LDFLAGS) -nostdlib -shared \
  96         -Wl,-e,_start -Wl,-Bsymbolic-functions \
  97         -o $@ $(LOBJS) $(LIBCC)
  98
  99 lib/libc.a: $(OBJS)
 100         rm -f $@
 101         $(AR) rc $@ $(OBJS)
 102         $(RANLIB) $@
 103
 104 $(EMPTY_LIBS):
 105         rm -f $@
 106         $(AR) rc $@
 107
 108 lib/%.o: crt/%.o
 109         cp $< $@
 110
 111 lib/musl-gcc.specs: tools/musl-gcc.specs.sh config.mak
 112         sh $< "$(includedir)" "$(libdir)" "$(LDSO_PATHNAME)" > $@
 113
 114 tools/musl-gcc: config.mak
 115         printf '#!/bin/sh\nexec "$${REALGCC:-gcc}" "$$@" -specs "%s/musl-gcc.specs"\n' "$(libdir)" > $@
 116         chmod +x $@
 117
 118 $(DESTDIR)$(bindir)/%: tools/%
 119         install -D $< $@
 120
 121 $(DESTDIR)$(libdir)/%.so: lib/%.so
 122         install -D -m 755 $< $@
 123
 124 $(DESTDIR)$(libdir)/%: lib/%
 125         install -D -m 644 $< $@
 126
 127 $(DESTDIR)$(includedir)/%: include/%
 128         install -D -m 644 $< $@
 129
 130 $(DESTDIR)$(LDSO_PATHNAME): $(DESTDIR)$(syslibdir)
 131         ln -sf $(libdir)/libc.so $@ || true
 132
 133 $(DESTDIR)$(syslibdir):
 134         install -d -m 755 $(DESTDIR)$(syslibdir)
 135
 136 install-libs: $(ALL_LIBS:lib/%=$(DESTDIR)$(libdir)/%) $(if $(SHARED_LIBS),$(DESTDIR)$(LDSO_PATHNAME),)
 137
 138 install-headers: $(ALL_INCLUDES:include/%=$(DESTDIR)$(includedir)/%)
 139
 140 install-tools: $(ALL_TOOLS:tools/%=$(DESTDIR)$(bindir)/%)
 141
 142
 143
 144 .PRECIOUS: $(CRT_LIBS:lib/%=crt/%)
 145
 146 .PHONY: all clean install install-libs install-headers install-tools