linux-kernel - [PATCH 22/27] sparc: add missing FORCE and fix 'targets' to make if

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Date:   Thu, 28 Jan 2021 09:51:04 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     linux-arch@...r.kernel.org, x86@...nel.org
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-alpha@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-ia64@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
        linux-mips@...r.kernel.org, linux-parisc@...r.kernel.org,
        linux-sh@...r.kernel.org, linux-um@...ts.infradead.org,
        linux-xtensa@...ux-xtensa.org, linuxppc-dev@...ts.ozlabs.org,
        sparclinux@...r.kernel.org, Masahiro Yamada <masahiroy@...nel.org>
Subject: [PATCH 22/27] sparc: add missing FORCE and fix 'targets' to make if_changed work

The rules in this Makefile cannot detect the command line change because
the prerequisite 'FORCE' is missing.

Adding 'FORCE' will result in the headers being rebuilt every time
because the 'targets' addition is also wrong; the file paths in
'targets' must be relative to the current Makefile.

Fix all of them so the if_changed rules work correctly.

Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

 arch/sparc/kernel/syscalls/Makefile | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/arch/sparc/kernel/syscalls/Makefile b/arch/sparc/kernel/syscalls/Makefile
index c22a21c39f30..556fe30a6c8f 100644
--- a/arch/sparc/kernel/syscalls/Makefile
+++ b/arch/sparc/kernel/syscalls/Makefile
@@ -22,24 +22,24 @@ quiet_cmd_systbl = SYSTBL  $@
 		   '$(systbl_offset_$(basetarget))'
 
 syshdr_abis_unistd_32 := common,32
-$(uapi)/unistd_32.h: $(syscall) $(syshdr)
+$(uapi)/unistd_32.h: $(syscall) $(syshdr) FORCE
 	$(call if_changed,syshdr)
 
 syshdr_abis_unistd_64 := common,64
-$(uapi)/unistd_64.h: $(syscall) $(syshdr)
+$(uapi)/unistd_64.h: $(syscall) $(syshdr) FORCE
 	$(call if_changed,syshdr)
 
 systbl_abis_syscall_table_32 := common,32
-$(kapi)/syscall_table_32.h: $(syscall) $(systbl)
+$(kapi)/syscall_table_32.h: $(syscall) $(systbl) FORCE
 	$(call if_changed,systbl)
 
 systbl_abis_syscall_table_64 := common,64
-$(kapi)/syscall_table_64.h: $(syscall) $(systbl)
+$(kapi)/syscall_table_64.h: $(syscall) $(systbl) FORCE
 	$(call if_changed,systbl)
 
 systbl_abis_syscall_table_c32 := common,32
 systbl_abi_syscall_table_c32 := c32
-$(kapi)/syscall_table_c32.h: $(syscall) $(systbl)
+$(kapi)/syscall_table_c32.h: $(syscall) $(systbl) FORCE
 	$(call if_changed,systbl)
 
 uapisyshdr-y		+= unistd_32.h unistd_64.h
@@ -47,9 +47,10 @@ kapisyshdr-y		+= syscall_table_32.h		\
 			   syscall_table_64.h		\
 			   syscall_table_c32.h
 
-targets	+= $(uapisyshdr-y) $(kapisyshdr-y)
+uapisyshdr-y	:= $(addprefix $(uapi)/, $(uapisyshdr-y))
+kapisyshdr-y	:= $(addprefix $(kapi)/, $(kapisyshdr-y))
+targets		+= $(addprefix ../../../../, $(uapisyshdr-y) $(kapisyshdr-y))
 
 PHONY += all
-all: $(addprefix $(uapi)/,$(uapisyshdr-y))
-all: $(addprefix $(kapi)/,$(kapisyshdr-y))
+all: $(uapisyshdr-y) $(kapisyshdr-y)
 	@:
-- 
2.27.0