libs/libc: Add CONFIG_MODLIB_SYSTEM_SYMTAB to generate the symbol table for dlopen/insmod.

libs/libc/.gitignore

@@ -2,6 +2,7 @@
 /Make_ubin.dep
 /Make_kbin.dep
 /exec_symtab.c
+/modlib_symtab.c
 /.depend
 /*.lib
 

libs/libc/Makefile

@@ -126,6 +126,17 @@ CSRCS += exec_symtab.c
 
 endif
 
+ifeq ($(CONFIG_MODLIB_SYSTEM_SYMTAB),y)
+
+modlib_symtab.c : $(CSVFILES) $(MKSYMTAB)
+	$(Q) cat $(CSVFILES) | LC_ALL=C sort >$@.csv
+	$(Q) $(MKSYMTAB) $@.csv $@ $(CONFIG_MODLIB_SYMTAB_ARRAY) $(CONFIG_MODLIB_NSYMBOLS_VAR)
+	$(Q) rm -f $@.csv
+
+CSRCS += modlib_symtab.c
+
+endif
+
 # REVISIT: Backslash causes problems in $(COBJS) target
 DELIM := $(strip /)
 BINDIR ?= bin

libs/libc/modlib/Kconfig

@@ -91,6 +91,10 @@ config MODLIB_NSYMBOLS_VAR
 	default "g_mod_nsymbols" if !EXECFUNCS_HAVE_SYMTAB
 	default EXECFUNCS_NSYMBOLS_VAR if EXECFUNCS_HAVE_SYMTAB
 
+config MODLIB_SYSTEM_SYMTAB
+	bool "Generate the system symbol table"
+	default n
+
 endif # MODLIB_HAVE_SYMTAB
 
 endmenu # Module library configuration