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