Merge tag 'kbuild-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - Fix false-positive build warnings for ARCH=ia64 builds

 - Optimize dictionary size for module compression with xz

 - Check the compiler and linker versions in Kconfig

 - Fix misuse of extra-y

 - Support DWARF v5 debug info

 - Clamp SUBLEVEL to 255 because stable releases 4.4.x and 4.9.x
   exceeded the limit

 - Add generic syscall{tbl,hdr}.sh for cleanups across arches

 - Minor cleanups of genksyms

 - Minor cleanups of Kconfig

* tag 'kbuild-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (38 commits)
  initramfs: Remove redundant dependency of RD_ZSTD on BLK_DEV_INITRD
  kbuild: remove deprecated 'always' and 'hostprogs-y/m'
  kbuild: parse C= and M= before changing the working directory
  kbuild: reuse this-makefile to define abs_srctree
  kconfig: unify rule of config, menuconfig, nconfig, gconfig, xconfig
  kconfig: omit --oldaskconfig option for 'make config'
  kconfig: fix 'invalid option' for help option
  kconfig: remove dead code in conf_askvalue()
  kconfig: clean up nested if-conditionals in check_conf()
  kconfig: Remove duplicate call to sym_get_string_value()
  Makefile: Remove # characters from compiler string
  Makefile: reuse CC_VERSION_TEXT
  kbuild: check the minimum linker version in Kconfig
  kbuild: remove ld-version macro
  scripts: add generic syscallhdr.sh
  scripts: add generic syscalltbl.sh
  arch: syscalls: remove $(srctree)/ prefix from syscall tables
  arch: syscalls: add missing FORCE and fix 'targets' to make if_changed work
  gen_compile_commands: prune some directories
  kbuild: simplify access to the kernel's version
  ...

2 files changed, 48 insertions, 66 deletions

diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 2c40e68853dd..8c19b82c6035 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -3,9 +3,6 @@
 # Kernel configuration targets
 # These targets are used from top-level makefile
 
-PHONY += xconfig gconfig menuconfig config localmodconfig localyesconfig \
-	build_menuconfig build_nconfig build_gconfig build_xconfig
-
 ifdef KBUILD_KCONFIG
 Kconfig := $(KBUILD_KCONFIG)
 else
@@ -19,29 +16,24 @@ endif
 # We need this, in case the user has it in its environment
 unexport CONFIG_
 
-xconfig: $(obj)/qconf
-	$(Q)$< $(silent) $(Kconfig)
-
-gconfig: $(obj)/gconf
-	$(Q)$< $(silent) $(Kconfig)
-
-menuconfig: $(obj)/mconf
-	$(Q)$< $(silent) $(Kconfig)
-
-config: $(obj)/conf
-	$(Q)$< $(silent) --oldaskconfig $(Kconfig)
-
-nconfig: $(obj)/nconf
-	$(Q)$< $(silent) $(Kconfig)
-
-build_menuconfig: $(obj)/mconf
+config-prog	:= conf
+menuconfig-prog	:= mconf
+nconfig-prog	:= nconf
+gconfig-prog	:= gconf
+xconfig-prog	:= qconf
 
-build_nconfig: $(obj)/nconf
+define config_rule
+PHONY += $(1)
+$(1): $(obj)/$($(1)-prog)
+	$(Q)$$< $(silent) $(Kconfig)
 
-build_gconfig: $(obj)/gconf
+PHONY += build_$(1)
+build_$(1): $(obj)/$($(1)-prog)
+endef
 
-build_xconfig: $(obj)/qconf
+$(foreach c, config menuconfig nconfig gconfig xconfig, $(eval $(call config_rule,$(c))))
 
+PHONY += localmodconfig localyesconfig
 localyesconfig localmodconfig: $(obj)/conf
 	$(Q)$(PERL) $(srctree)/$(src)/streamline_config.pl --$@ $(srctree) $(Kconfig) > .tmp.config
 	$(Q)if [ -f .config ]; then 				\
diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index db03e2f45de4..957d2a0832f7 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -84,8 +84,6 @@ static void xfgets(char *str, int size, FILE *in)
 
 static int conf_askvalue(struct symbol *sym, const char *def)
 {
-	enum symbol_type type = sym_get_type(sym);
-
 	if (!sym_has_value(sym))
 		printf("(NEW) ");
 
@@ -107,24 +105,12 @@ static int conf_askvalue(struct symbol *sym, const char *def)
 			return 0;
 		}
 		/* fall through */
-	case oldaskconfig:
+	default:
 		fflush(stdout);
 		xfgets(line, sizeof(line), stdin);
-		return 1;
-	default:
 		break;
 	}
 
-	switch (type) {
-	case S_INT:
-	case S_HEX:
-	case S_STRING:
-		printf("%s\n", def);
-		return 1;
-	default:
-		;
-	}
-	printf("%s", line);
 	return 1;
 }
 
@@ -137,7 +123,7 @@ static int conf_string(struct menu *menu)
 		printf("%*s%s ", indent - 1, "", menu->prompt->text);
 		printf("(%s) ", sym->name);
 		def = sym_get_string_value(sym);
-		if (sym_get_string_value(sym))
+		if (def)
 			printf("[%s] ", def);
 		if (!conf_askvalue(sym, def))
 			return 0;
@@ -419,34 +405,37 @@ static void check_conf(struct menu *menu)
 		return;
 
 	sym = menu->sym;
-	if (sym && !sym_has_value(sym)) {
-		if (sym_is_changeable(sym) ||
-		    (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes)) {
-			if (input_mode == listnewconfig) {
-				if (sym->name) {
-					const char *str;
-
-					if (sym->type == S_STRING) {
-						str = sym_get_string_value(sym);
-						str = sym_escape_string_value(str);
-						printf("%s%s=%s\n", CONFIG_, sym->name, str);
-						free((void *)str);
-					} else {
-						str = sym_get_string_value(sym);
-						printf("%s%s=%s\n", CONFIG_, sym->name, str);
-					}
-				}
-			} else if (input_mode == helpnewconfig) {
-				printf("-----\n");
-				print_help(menu);
-				printf("-----\n");
+	if (sym && !sym_has_value(sym) &&
+	    (sym_is_changeable(sym) ||
+	     (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes))) {
 
-			} else {
-				if (!conf_cnt++)
-					printf("*\n* Restart config...\n*\n");
-				rootEntry = menu_get_parent_menu(menu);
-				conf(rootEntry);
+		switch (input_mode) {
+		case listnewconfig:
+			if (sym->name) {
+				const char *str;
+
+				if (sym->type == S_STRING) {
+					str = sym_get_string_value(sym);
+					str = sym_escape_string_value(str);
+					printf("%s%s=%s\n", CONFIG_, sym->name, str);
+					free((void *)str);
+				} else {
+					str = sym_get_string_value(sym);
+					printf("%s%s=%s\n", CONFIG_, sym->name, str);
+				}
 			}
+			break;
+		case helpnewconfig:
+			printf("-----\n");
+			print_help(menu);
+			printf("-----\n");
+			break;
+		default:
+			if (!conf_cnt++)
+				printf("*\n* Restart config...\n*\n");
+			rootEntry = menu_get_parent_menu(menu);
+			conf(rootEntry);
+			break;
 		}
 	}
 
@@ -494,6 +483,7 @@ static void conf_usage(const char *progname)
 	printf("  --randconfig            New config with random answer to all options\n");
 	printf("  --yes2modconfig         Change answers from yes to mod if possible\n");
 	printf("  --mod2yesconfig         Change answers from mod to yes if possible\n");
+	printf("  (If none of the above is given, --oldaskconfig is the default)\n");
 }
 
 int main(int ac, char **av)
@@ -505,7 +495,7 @@ int main(int ac, char **av)
 
 	tty_stdio = isatty(0) && isatty(1);
 
-	while ((opt = getopt_long(ac, av, "s", long_opts, NULL)) != -1) {
+	while ((opt = getopt_long(ac, av, "hs", long_opts, NULL)) != -1) {
 		if (opt == 's') {
 			conf_set_message_callback(NULL);
 			continue;
@@ -561,7 +551,7 @@ int main(int ac, char **av)
 		case yes2modconfig:
 		case mod2yesconfig:
 			break;
-		case '?':
+		case 'h':
 			conf_usage(progname);
 			exit(1);
 			break;