linux-kernel - [PATCH 4/4] x86/boot/compressed: Switch to -ffile-prefix-map

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Message-Id: <20250313-kbuild-prefix-map-v1-4-38cea8448c5f@weissschuh.net>
Date: Thu, 13 Mar 2025 16:59:12 +0100
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Masahiro Yamada <masahiroy@...nel.org>, 
 Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas@...sle.eu>, 
 Jonathan Corbet <corbet@....net>, Thomas Gleixner <tglx@...utronix.de>, 
 Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, 
 Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org, 
 "H. Peter Anvin" <hpa@...or.com>, Ben Hutchings <ben@...adent.org.uk>
Cc: linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-doc@...r.kernel.org, 
 Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH 4/4] x86/boot/compressed: Switch to -ffile-prefix-map

-ffile-prefix-map is a more general variant of the currently used
-fmacro-prefix-map. It is also what the top-level Makefile is using now.

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 arch/x86/boot/compressed/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
index 606c74f274593ebaf6200b7d307a453e2c6e872e..73a67366cb706658f9680cd50864a68546d3dc98 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -38,7 +38,7 @@ KBUILD_CFLAGS += -fno-stack-protector
 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
 KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
 KBUILD_CFLAGS += -Wno-pointer-sign
-KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
+KBUILD_CFLAGS += $(call cc-option,-ffile-prefix-map=$(srctree)/=)
 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 KBUILD_CFLAGS += -D__DISABLE_EXPORTS
 # Disable relocation relaxation in case the link is not PIE.

-- 
2.48.1