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 ARCH_INCLUDES = $(wildcard arch/$(ARCH)/bits/*.h)
  41 ALL_INCLUDES = $(sort $(wildcard include/*.h include/*/*.h) $(GENH) $(ARCH_INCLUDES:arch/$(ARCH)/%=include/%))
  42
  43 EMPTY_LIB_NAMES = m rt pthread crypt util xnet resolv dl
  44 EMPTY_LIBS = $(EMPTY_LIB_NAMES:%=lib/lib%.a)
  45 CRT_LIBS = lib/crt1.o lib/Scrt1.o lib/crti.o lib/crtn.o
  46 STATIC_LIBS = lib/libc.a
  47 SHARED_LIBS = lib/libc.so
  48 TOOL_LIBS = lib/musl-gcc.specs
  49 ALL_LIBS = $(CRT_LIBS) $(STATIC_LIBS) $(SHARED_LIBS) $(EMPTY_LIBS) $(TOOL_LIBS)
  50 ALL_TOOLS = tools/musl-gcc
  51
  52 LDSO_PATHNAME = $(syslibdir)/ld-musl-$(ARCH).so.1
  53
  54 -include config.mak
  55
  56 all: $(ALL_LIBS) $(ALL_TOOLS)
  57
  58 install: install-libs install-headers install-tools
  59
  60 clean:
  61         rm -f crt/*.o
  62         rm -f $(OBJS)
  63         rm -f $(LOBJS)
  64         rm -f $(ALL_LIBS) lib/*.[ao] lib/*.so
  65         rm -f $(ALL_TOOLS)
  66         rm -f $(GENH)
  67         rm -f include/bits
  68
  69 distclean: clean
  70         rm -f config.mak
  71
  72 include/bits:
  73         @test "$(ARCH)" || { echo "Please set ARCH in config.mak before running make." ; exit 1 ; }
  74         ln -sf ../arch/$(ARCH)/bits $@
  75
  76 include/bits/alltypes.h.sh: include/bits
  77
  78 include/bits/alltypes.h: include/bits/alltypes.h.sh
  79         sh $< > $@
  80
  81 src/ldso/dynlink.lo: arch/$(ARCH)/reloc.h
  82
  83 %.o: $(ARCH)/%.s
  84         $(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<
  85
  86 %.o: %.c $(GENH) $(IMPH)
  87         $(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<
  88
  89 %.lo: $(ARCH)/%.s
  90         $(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $<
  91
  92 %.lo: %.c $(GENH) $(IMPH)
  93         $(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $<
  94
  95 lib/libc.so: $(LOBJS)
  96         $(CC) $(CFLAGS_ALL_SHARED) $(LDFLAGS) -nostdlib -shared \
  97         -Wl,-e,_start -Wl,-Bsymbolic-functions \
  98         -o $@ $(LOBJS) $(LIBCC)
  99
 100 lib/libc.a: $(OBJS)
 101         rm -f $@
 102         $(AR) rc $@ $(OBJS)
 103         $(RANLIB) $@
 104
 105 $(EMPTY_LIBS):
 106         rm -f $@
 107         $(AR) rc $@
 108
 109 lib/%.o: crt/%.o
 110         cp $< $@
 111
 112 lib/musl-gcc.specs: tools/musl-gcc.specs.sh config.mak
 113         sh $< "$(includedir)" "$(libdir)" "$(LDSO_PATHNAME)" > $@
 114
 115 tools/musl-gcc: config.mak
 116         printf '#!/bin/sh\nexec "$${REALGCC:-gcc}" "$$@" -specs "%s/musl-gcc.specs"\n' "$(libdir)" > $@
 117         chmod +x $@
 118
 119 $(DESTDIR)$(bindir)/%: tools/%
 120         install -D $< $@
 121
 122 $(DESTDIR)$(libdir)/%.so: lib/%.so
 123         install -D -m 755 $< $@
 124
 125 $(DESTDIR)$(libdir)/%: lib/%
 126         install -D -m 644 $< $@
 127
 128 $(DESTDIR)$(includedir)/bits/%: arch/$(ARCH)/bits/%
 129         install -D -m 644 $< $@
 130
 131 $(DESTDIR)$(includedir)/%: include/%
 132         install -D -m 644 $< $@
 133
 134 $(DESTDIR)$(LDSO_PATHNAME): $(DESTDIR)$(syslibdir)
 135         ln -sf $(libdir)/libc.so $@ || true
 136
 137 $(DESTDIR)$(syslibdir):
 138         install -d -m 755 $(DESTDIR)$(syslibdir)
 139
 140 install-libs: $(ALL_LIBS:lib/%=$(DESTDIR)$(libdir)/%) $(if $(SHARED_LIBS),$(DESTDIR)$(LDSO_PATHNAME),)
 141
 142 install-headers: $(ALL_INCLUDES:include/%=$(DESTDIR)$(includedir)/%)
 143
 144 install-tools: $(ALL_TOOLS:tools/%=$(DESTDIR)$(bindir)/%)
 145
 146
 147
 148 .PRECIOUS: $(CRT_LIBS:lib/%=crt/%)
 149
 150 .PHONY: all clean install install-libs install-headers install-tools