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-rw-r--r--scripts/genksyms/Makefile30
1 files changed, 30 insertions, 0 deletions
diff --git a/scripts/genksyms/Makefile b/scripts/genksyms/Makefile
new file mode 100644
index 000000000..ce4f99935
--- /dev/null
+++ b/scripts/genksyms/Makefile
@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: GPL-2.0
+
+hostprogs-always-y += genksyms
+
+genksyms-objs := genksyms.o parse.tab.o lex.lex.o
+
+# FIXME: fix the ambiguous grammar in parse.y and delete this hack
+#
+# Suppress shift/reduce, reduce/reduce conflicts warnings
+# unless W=1 is specified.
+#
+# Just in case, run "$(YACC) --version" without suppressing stderr
+# so that 'bison: not found' will be displayed if it is missing.
+ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),)
+
+quiet_cmd_bison_no_warn = $(quiet_cmd_bison)
+ cmd_bison_no_warn = $(YACC) --version >/dev/null; \
+ $(cmd_bison) 2>/dev/null
+
+$(obj)/pars%.tab.c $(obj)/pars%.tab.h: $(src)/pars%.y FORCE
+ $(call if_changed,bison_no_warn)
+
+endif
+
+# -I needed for generated C source (shipped source)
+HOSTCFLAGS_parse.tab.o := -I $(srctree)/$(src)
+HOSTCFLAGS_lex.lex.o := -I $(srctree)/$(src)
+
+# dependencies on generated files need to be listed explicitly
+$(obj)/lex.lex.o: $(obj)/parse.tab.h