path: root/lib
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authorLinus Torvalds <>2021-04-29 14:24:39 -0700
committerLinus Torvalds <>2021-04-29 14:24:39 -0700
commitb0030af53a74a08c77ea11d3888da21542af2d0e (patch)
tree04130d622fdb59ee3ee1bbc015110f4054e32a8b /lib
parent9d31d2338950293ec19d9b095fbaa9030899dcb4 (diff)
parentf634ca650f724347892068489c7920631a3aac6a (diff)
Merge tag 'kbuild-v5.13' of git://
Pull Kbuild updates from Masahiro Yamada: - Evaluate $(call cc-option,...) etc. only for build targets - Add CONFIG_VMLINUX_MAP to generate .map file when linking vmlinux - Remove unnecessary --gcc-toolchains Clang flag because the --prefix flag finds the toolchains - Do not pass Clang's --prefix flag when using the integrated as - Check the assembler version in Kconfig time - Add new CONFIG options, AS_VERSION, AS_IS_GNU, AS_IS_LLVM to clean up some dependencies in Kconfig - Fix invalid Module.symvers creation when building only modules without vmlinux - Fix false-positive modpost warnings when CONFIG_TRIM_UNUSED_KSYMS is set, but there is no module to build - Refactor module installation Makefile - Support zstd for module compression - Convert alpha and ia64 to use generic shell scripts to generate the syscall headers - Add a new elfnote to indicate if the kernel was built with LTO, which will be used by pahole - Flatten the directory structure under include/config/ so CONFIG options and filenames match - Change the deb source package name from linux-$(KERNELRELEASE) to linux-upstream * tag 'kbuild-v5.13' of git:// (42 commits) kbuild: Add $(KBUILD_HOSTLDFLAGS) to 'has_libelf' test kbuild: deb-pkg: change the source package name to linux-upstream tools: do not include scripts/Kbuild.include kbuild: redo fake deps at include/config/*.h kbuild: remove TMPO from try-run MAINTAINERS: add pattern for dummy-tools kbuild: add an elfnote for whether vmlinux is built with lto ia64: syscalls: switch to generic ia64: syscalls: switch to generic alpha: syscalls: switch to generic alpha: syscalls: switch to generic sysctl: use min() helper for namecmp() kbuild: add support for zstd compressed modules kbuild: remove CONFIG_MODULE_COMPRESS kbuild: merge scripts/Makefile.modsign to scripts/Makefile.modinst kbuild: move module strip/compression code into scripts/Makefile.modinst kbuild: refactor scripts/Makefile.modinst kbuild: rename extmod-prefix to extmod_prefix kbuild: check module name conflict for external modules as well kbuild: show the target directory for depmod log ...
Diffstat (limited to 'lib')
1 files changed, 11 insertions, 2 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 5443da4e5e8a..b38bbb5bb00e 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -284,8 +284,7 @@ config DEBUG_INFO_DWARF4
bool "Generate DWARF Version 5 debuginfo"
- depends on GCC_VERSION >= 50000 || CC_IS_CLANG
- depends on CC_IS_GCC || $(success,$(srctree)/scripts/ $(CC) $(CLANG_FLAGS))
+ depends on GCC_VERSION >= 50000 || (CC_IS_CLANG && (AS_IS_LLVM || (AS_IS_GNU && AS_VERSION >= 23502)))
depends on !DEBUG_INFO_BTF
Generate DWARF v5 debug info. Requires binutils 2.35.2, gcc 5.0+ (gcc
@@ -449,6 +448,16 @@ config VMLINUX_VALIDATION
default y
+ bool "Generate file when linking"
+ depends on EXPERT
+ help
+ Selecting this option will pass "" to ld
+ when linking vmlinux. That file can be useful for verifying
+ and debugging magic section games, and for seeing which
+ pieces of code get eliminated with
bool "Force weak per-cpu definitions"
depends on DEBUG_KERNEL