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 GENH_INT = src/internal/version.h
  24 IMPH = src/internal/stdio_impl.h src/internal/pthread_impl.h src/internal/libc.h
  25
  26 LDFLAGS =
  27 LDFLAGS_AUTO =
  28 LIBCC = -lgcc
  29 CPPFLAGS =
  30 CFLAGS =
  31 CFLAGS_AUTO = -Os -pipe
  32 CFLAGS_C99FSE = -std=c99 -ffreestanding -nostdinc
  33
  34 CFLAGS_ALL = $(CFLAGS_C99FSE)
  35 CFLAGS_ALL += -D_XOPEN_SOURCE=700 -I./arch/$(ARCH) -I./src/internal -I./include
  36 CFLAGS_ALL += $(CPPFLAGS) $(CFLAGS_AUTO) $(CFLAGS)
  37 CFLAGS_ALL_STATIC = $(CFLAGS_ALL)
  38 CFLAGS_ALL_SHARED = $(CFLAGS_ALL) -fPIC -DSHARED
  39
  40 LDFLAGS_ALL = $(LDFLAGS_AUTO) $(LDFLAGS)
  41
  42 AR      = $(CROSS_COMPILE)ar
  43 RANLIB  = $(CROSS_COMPILE)ranlib
  44 INSTALL = ./tools/install.sh
  45
  46 ARCH_INCLUDES = $(wildcard arch/$(ARCH)/bits/*.h)
  47 ALL_INCLUDES = $(sort $(wildcard include/*.h include/*/*.h) $(GENH) $(ARCH_INCLUDES:arch/$(ARCH)/%=include/%))
  48
  49 EMPTY_LIB_NAMES = m rt pthread crypt util xnet resolv dl
  50 EMPTY_LIBS = $(EMPTY_LIB_NAMES:%=lib/lib%.a)
  51 CRT_LIBS = lib/crt1.o lib/Scrt1.o lib/rcrt1.o lib/crti.o lib/crtn.o
  52 STATIC_LIBS = lib/libc.a
  53 SHARED_LIBS = lib/libc.so
  54 TOOL_LIBS = lib/musl-gcc.specs
  55 ALL_LIBS = $(CRT_LIBS) $(STATIC_LIBS) $(SHARED_LIBS) $(EMPTY_LIBS) $(TOOL_LIBS)
  56 ALL_TOOLS = tools/musl-gcc
  57
  58 WRAPCC_GCC = gcc
  59 WRAPCC_CLANG = clang
  60
  61 LDSO_PATHNAME = $(syslibdir)/ld-musl-$(ARCH)$(SUBARCH).so.1
  62
  63 -include config.mak
  64
  65 all: $(ALL_LIBS) $(ALL_TOOLS)
  66
  67 install: install-libs install-headers install-tools
  68
  69 clean:
  70         rm -f crt/*.o
  71         rm -f $(OBJS)
  72         rm -f $(LOBJS)
  73         rm -f $(ALL_LIBS) lib/*.[ao] lib/*.so
  74         rm -f $(ALL_TOOLS)
  75         rm -f $(GENH) $(GENH_INT)
  76         rm -f include/bits
  77
  78 distclean: clean
  79         rm -f config.mak
  80
  81 include/bits:
  82         @test "$(ARCH)" || { echo "Please set ARCH in config.mak before running make." ; exit 1 ; }
  83         ln -sf ../arch/$(ARCH)/bits $@
  84
  85 include/bits/alltypes.h.in: include/bits
  86
  87 include/bits/alltypes.h: include/bits/alltypes.h.in include/alltypes.h.in tools/mkalltypes.sed
  88         sed -f tools/mkalltypes.sed include/bits/alltypes.h.in include/alltypes.h.in > $@
  89
  90 src/internal/version.h: $(wildcard VERSION .git)
  91         printf '#define VERSION "%s"\n' "$$(sh tools/version.sh)" > $@
  92
  93 src/internal/version.lo: src/internal/version.h
  94
  95 crt/rcrt1.o src/ldso/dlstart.lo src/ldso/dynlink.lo: src/internal/dynlink.h arch/$(ARCH)/reloc.h
  96
  97 crt/crt1.o crt/Scrt1.o crt/rcrt1.o src/ldso/dlstart.lo: $(wildcard arch/$(ARCH)/crt_arch.h)
  98
  99 crt/rcrt1.o: src/ldso/dlstart.c
 100
 101 crt/Scrt1.o crt/rcrt1.o: CFLAGS_ALL += -fPIC
 102
 103 OPTIMIZE_SRCS = $(wildcard $(OPTIMIZE_GLOBS:%=src/%))
 104 $(OPTIMIZE_SRCS:%.c=%.o) $(OPTIMIZE_SRCS:%.c=%.lo): CFLAGS += -O3
 105
 106 MEMOPS_SRCS = src/string/memcpy.c src/string/memmove.c src/string/memcmp.c src/string/memset.c
 107 $(MEMOPS_SRCS:%.c=%.o) $(MEMOPS_SRCS:%.c=%.lo): CFLAGS_ALL += $(CFLAGS_MEMOPS)
 108
 109 NOSSP_SRCS = $(wildcard crt/*.c) \
 110         src/env/__libc_start_main.c src/env/__init_tls.c \
 111         src/thread/__set_thread_area.c src/env/__stack_chk_fail.c \
 112         src/string/memset.c src/string/memcpy.c \
 113         src/ldso/dlstart.c src/ldso/dynlink.c
 114 $(NOSSP_SRCS:%.c=%.o) $(NOSSP_SRCS:%.c=%.lo): CFLAGS_ALL += $(CFLAGS_NOSSP)
 115
 116 $(CRT_LIBS:lib/%=crt/%): CFLAGS_ALL += -DCRT
 117
 118 # This incantation ensures that changes to any subarch asm files will
 119 # force the corresponding object file to be rebuilt, even if the implicit
 120 # rule below goes indirectly through a .sub file.
 121 define mkasmdep
 122 $(dir $(patsubst %/,%,$(dir $(1))))$(notdir $(1:.s=.o)): $(1)
 123 endef
 124 $(foreach s,$(wildcard src/*/$(ARCH)*/*.s),$(eval $(call mkasmdep,$(s))))
 125
 126 # Choose invocation of assembler to be used
 127 # $(1) is input file, $(2) is output file, $(3) is assembler flags
 128 ifeq ($(ADD_CFI),yes)
 129         AS_CMD = LC_ALL=C awk -f tools/add-cfi.common.awk -f tools/add-cfi.$(ARCH).awk $< | $(CC) -x assembler -c -o $@ -
 130 else
 131         AS_CMD = $(CC) -c -o $@ $<
 132 endif
 133
 134 %.o: $(ARCH)$(ASMSUBARCH)/%.sub
 135         $(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $(dir $<)$(shell cat $<)
 136
 137 %.o: $(ARCH)/%.s
 138         $(AS_CMD) $(CFLAGS_ALL_STATIC)
 139
 140 %.o: %.c $(GENH) $(IMPH)
 141         $(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<
 142
 143 %.lo: $(ARCH)$(ASMSUBARCH)/%.sub
 144         $(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $(dir $<)$(shell cat $<)
 145
 146 %.lo: $(ARCH)/%.s
 147         $(AS_CMD) $(CFLAGS_ALL_SHARED)
 148
 149 %.lo: %.c $(GENH) $(IMPH)
 150         $(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $<
 151
 152 lib/libc.so: $(LOBJS)
 153         $(CC) $(CFLAGS_ALL_SHARED) $(LDFLAGS_ALL) -nostdlib -shared \
 154         -Wl,-e,_dlstart -Wl,-Bsymbolic-functions \
 155         -o $@ $(LOBJS) $(LIBCC)
 156
 157 lib/libc.a: $(OBJS)
 158         rm -f $@
 159         $(AR) rc $@ $(OBJS)
 160         $(RANLIB) $@
 161
 162 $(EMPTY_LIBS):
 163         rm -f $@
 164         $(AR) rc $@
 165
 166 lib/%.o: crt/%.o
 167         cp $< $@
 168
 169 lib/musl-gcc.specs: tools/musl-gcc.specs.sh config.mak
 170         sh $< "$(includedir)" "$(libdir)" "$(LDSO_PATHNAME)" > $@
 171
 172 tools/musl-gcc: config.mak
 173         printf '#!/bin/sh\nexec "$${REALGCC:-$(WRAPCC_GCC)}" "$$@" -specs "%s/musl-gcc.specs"\n' "$(libdir)" > $@
 174         chmod +x $@
 175
 176 tools/%-clang: tools/%-clang.in config.mak
 177         sed -e 's!@CC@!$(WRAPCC_CLANG)!g' -e 's!@PREFIX@!$(prefix)!g' -e 's!@INCDIR@!$(includedir)!g' -e 's!@LIBDIR@!$(libdir)!g' -e 's!@LDSO@!$(LDSO_PATHNAME)!g' $< > $@
 178         chmod +x $@
 179
 180 $(DESTDIR)$(bindir)/%: tools/%
 181         $(INSTALL) -D $< $@
 182
 183 $(DESTDIR)$(libdir)/%.so: lib/%.so
 184         $(INSTALL) -D -m 755 $< $@
 185
 186 $(DESTDIR)$(libdir)/%: lib/%
 187         $(INSTALL) -D -m 644 $< $@
 188
 189 $(DESTDIR)$(includedir)/bits/%: arch/$(ARCH)/bits/%
 190         $(INSTALL) -D -m 644 $< $@
 191
 192 $(DESTDIR)$(includedir)/%: include/%
 193         $(INSTALL) -D -m 644 $< $@
 194
 195 $(DESTDIR)$(LDSO_PATHNAME): $(DESTDIR)$(libdir)/libc.so
 196         $(INSTALL) -D -l $(libdir)/libc.so $@ || true
 197
 198 install-libs: $(ALL_LIBS:lib/%=$(DESTDIR)$(libdir)/%) $(if $(SHARED_LIBS),$(DESTDIR)$(LDSO_PATHNAME),)
 199
 200 install-headers: $(ALL_INCLUDES:include/%=$(DESTDIR)$(includedir)/%)
 201
 202 install-tools: $(ALL_TOOLS:tools/%=$(DESTDIR)$(bindir)/%)
 203
 204 musl-git-%.tar.gz: .git
 205          git archive --format=tar.gz --prefix=$(patsubst %.tar.gz,%,$@)/ -o $@ $(patsubst musl-git-%.tar.gz,%,$@)
 206
 207 musl-%.tar.gz: .git
 208          git archive --format=tar.gz --prefix=$(patsubst %.tar.gz,%,$@)/ -o $@ v$(patsubst musl-%.tar.gz,%,$@)
 209
 210 .PHONY: all clean install install-libs install-headers install-tools