lib.mk

   1 #
   2 # Most of the libraries just generate object files that
   3 # are later linked in build into the libGP.so
   4 #
   5 ifndef LIBNAME
   6 $(error LIBNAME not defined, fix your library Makefile)
   7 endif
   8
   9 ifeq ($(BUILDLIB),yes)
  10 #
  11 # Rules for single library, applied only when objects
  12 # are not linked to the libGP.so. This generates libGP_$(LIBNAME).
  13 #
  14
  15 include $(TOPDIR)/libver.mk
  16
  17 LIB_NAME=libGP_$(LIBNAME)
  18 BUILD_DIR=$(TOPDIR)/build/
  19
  20 STATIC_LIB=$(LIB_NAME).$(LIB_VERSION).a
  21 DYNAMIC_LIB=$(LIB_NAME).so.$(LIB_VERSION).$(LIB_RELEASE)
  22 SONAME=$(LIB_NAME).so.$(LIB_MAJOR)
  23 SYMLINKS=$(LIB_NAME).so.$(LIB_MAJOR) $(LIB_NAME).so
  24
  25 LIBS=$(BUILD_DIR)$(STATIC_LIB) $(BUILD_DIR)$(DYNAMIC_LIB)
  26
  27 ALL+=$(LIBS) $(SYMLINKS)
  28 CLEAN+=$(LIBS) $(addprefix $(BUILD_DIR),$(SYMLINKS))
  29
  30 #
  31 # OBJECTS are set in post.mk so we need to duplicate the values in
  32 # OBJS here too to have correct dependencies
  33 #
  34 OBJS=$(CSOURCES:.c=.o)
  35
  36 $(BUILD_DIR)$(DYNAMIC_LIB): $(OBJS)
  37 ifdef VERBOSE
  38         rm -f $@
  39         $(CC) -fPIC --shared -Wl,-soname -Wl,$(SONAME) $^ -o $@
  40 else
  41         @rm -f $(@)
  42         @echo "LD   $@"
  43         @$(CC) -fPIC --shared -Wl,-soname -Wl,$(SONAME) $^ -o $@
  44 endif
  45
  46 $(BUILD_DIR)$(STATIC_LIB): $(OBJS)
  47 ifdef VERBOSE
  48         $(AR) rcs $@ $^
  49 else
  50         @echo "AR   $@"
  51         @$(AR) rcs $@ $^
  52 endif
  53
  54 $(SYMLINKS): $(BUILD_DIR)$(DYNAMIC_LIB)
  55 ifdef VERBOSE
  56         rm -f $(BUILD_DIR)$@
  57         cd $(BUILD_DIR) && ln -s $(DYNAMIC_LIB) $@
  58 else
  59         @echo "LN   $@"
  60         @rm -f $(BUILD_DIR)$@
  61         @cd $(BUILD_DIR) && ln -s $(DYNAMIC_LIB) $@
  62 endif
  63
  64 else
  65 #
  66 # If we are not executed from the top Makefile, trigger
  67 # libGP.so rebuild.
  68 #
  69 include $(TOPDIR)/config.mk
  70
  71 ifndef TOP_MAKE
  72 ALL+=rebuild_lib
  73
  74 rebuild_lib:
  75         @$(MAKE) --no-print-directory -C $(TOPDIR)/build/
  76 endif
  77 endif