Linux build: add an objtool wrapper to filter out the --Werror flag

Author: AttilaFueloep

configure.ac

@@ -86,6 +86,9 @@ AC_CONFIG_FILES([
 	zfs.release
 ])
 
+AC_CONFIG_FILES([scripts/objtool-wrapper], [chmod +x scripts/objtool-wrapper])
+
+
 
 AC_OUTPUT
 

module/Makefile.in

@@ -57,6 +57,7 @@ modules-Linux:
 		$(if @KERNEL_LD@,LD=@KERNEL_LD@) $(if @KERNEL_LLVM@,LLVM=@KERNEL_LLVM@) \
 		$(if @KERNEL_CROSS_COMPILE@,CROSS_COMPILE=@KERNEL_CROSS_COMPILE@) \
 		$(if @KERNEL_ARCH@,ARCH=@KERNEL_ARCH@) \
+		objtool=@abs_top_srcdir@/scripts/objtool-wrapper \
 		M="$$PWD" @KERNEL_MAKE@ CONFIG_ZFS=m modules
 
 modules-FreeBSD:

scripts/objtool-wrapper.in

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+# SPDX-License-Identifier: MIT
+
+# Copyright (c) 2025 Attila Füöp <[email protected]>
+
+# Filter out objtools '--Werror' flag.
+
+objtool=@LINUX@/tools/objtool/objtool
+args=$(echo "$*" | sed s/--Werror//g)
+# echo "wrapper: $objtool $args"
+
+exec "$objtool" $args
+
+# Or use bash: $objtool ${*/--Werror/}
+