scripts/genksyms/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2
   3 hostprogs-y     := genksyms
   4 always          := $(hostprogs-y)
   5
   6 genksyms-objs   := genksyms.o parse.tab.o lex.lex.o
   7
   8 # FIXME: fix the ambiguous grammar in parse.y and delete this hack
   9 #
  10 # Suppress shift/reduce, reduce/reduce conflicts warnings
  11 # unless W=1 is specified.
  12 #
  13 # Just in case, run "$(YACC) --version" without suppressing stderr
  14 # so that 'bison: not found' will be displayed if it is missing.
  15 ifeq ($(findstring 1,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
  16
  17 quiet_cmd_bison_no_warn = $(quiet_cmd_bison)
  18       cmd_bison_no_warn = $(YACC) --version >/dev/null; \
  19                           $(cmd_bison) 2>/dev/null
  20
  21 $(obj)/parse.tab.c: $(src)/parse.y FORCE
  22         $(call if_changed,bison_no_warn)
  23
  24 quiet_cmd_bison_h_no_warn = $(quiet_cmd_bison_h)
  25       cmd_bison_h_no_warn = $(YACC) --version >/dev/null; \
  26                             $(cmd_bison_h) 2>/dev/null
  27
  28 $(obj)/parse.tab.h: $(src)/parse.y FORCE
  29         $(call if_changed,bison_h_no_warn)
  30
  31 endif
  32
  33 # -I needed for generated C source (shipped source)
  34 HOSTCFLAGS_parse.tab.o := -I $(srctree)/$(src)
  35 HOSTCFLAGS_lex.lex.o := -I $(srctree)/$(src)
  36
  37 # dependencies on generated files need to be listed explicitly
  38 $(obj)/lex.lex.o: $(obj)/parse.tab.h