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authorLinus Torvalds <torvalds@linux-foundation.org>2022-10-16 11:12:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-10-16 11:12:22 -0700
commit2df76606db9de579bc96725981db4e8daa281993 (patch)
tree93c388804a93ff5bf54b4781c73abf4e0a34f7f0
parent2fcd8f108f25ef0cbbfcb57acf1c42934c238ed5 (diff)
parent0a6de78cff600cb991f2a1b7ed376935871796a0 (diff)
Merge tag 'kbuild-fixes-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada: - Fix CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y compile error for the combination of Clang >= 14 and GAS <= 2.35. - Drop vmlinux.bz2 from the rpm package as it just annoyingly increased the package size. - Fix modpost error under build environments using musl. - Make *.ll files keep value names for easier debugging - Fix single directory build - Prevent RISC-V from selecting the broken DWARF5 support when Clang and GAS are used together. * tag 'kbuild-fixes-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: lib/Kconfig.debug: Add check for non-constant .{s,u}leb128 support to DWARF5 kbuild: fix single directory build kbuild: add -fno-discard-value-names to cmd_cc_ll_c scripts/clang-tools: Convert clang-tidy args to list modpost: put modpost options before argument kbuild: Stop including vmlinux.bz2 in the rpm's Kconfig.debug: add toolchain checks for DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT Kconfig.debug: simplify the dependency of DEBUG_INFO_DWARF4/5
-rw-r--r--Makefile2
-rw-r--r--lib/Kconfig.debug10
-rw-r--r--scripts/Makefile.build2
-rw-r--r--scripts/Makefile.modpost2
-rwxr-xr-xscripts/clang-tools/run-clang-tools.py11
-rwxr-xr-xscripts/package/mkspec2
6 files changed, 18 insertions, 11 deletions
diff --git a/Makefile b/Makefile
index cfbe6a7de640..c690361b393f 100644
--- a/Makefile
+++ b/Makefile
@@ -1979,6 +1979,8 @@ endif
single-goals := $(addprefix $(build-dir)/, $(single-no-ko))
+KBUILD_MODULES := 1
+
endif
# Preset locale variables to speed up the build process. Limit locale
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 73178b0e43a4..3fc7abffc7aa 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -231,6 +231,11 @@ config DEBUG_INFO
in the "Debug information" choice below, indicating that debug
information will be generated for build targets.
+# Clang is known to generate .{s,u}leb128 with symbol deltas with DWARF5, which
+# some targets may not support: https://sourceware.org/bugzilla/show_bug.cgi?id=27215
+config AS_HAS_NON_CONST_LEB128
+ def_bool $(as-instr,.uleb128 .Lexpr_end4 - .Lexpr_start3\n.Lexpr_start3:\n.Lexpr_end4:)
+
choice
prompt "Debug information"
depends on DEBUG_KERNEL
@@ -253,6 +258,7 @@ config DEBUG_INFO_NONE
config DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
bool "Rely on the toolchain's implicit default DWARF version"
select DEBUG_INFO
+ depends on !CC_IS_CLANG || AS_IS_LLVM || CLANG_VERSION < 140000 || (AS_IS_GNU && AS_VERSION >= 23502 && AS_HAS_NON_CONST_LEB128)
help
The implicit default version of DWARF debug info produced by a
toolchain changes over time.
@@ -264,7 +270,7 @@ config DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
config DEBUG_INFO_DWARF4
bool "Generate DWARF Version 4 debuginfo"
select DEBUG_INFO
- depends on !CC_IS_CLANG || (CC_IS_CLANG && (AS_IS_LLVM || (AS_IS_GNU && AS_VERSION >= 23502)))
+ depends on !CC_IS_CLANG || AS_IS_LLVM || (AS_IS_GNU && AS_VERSION >= 23502)
help
Generate DWARF v4 debug info. This requires gcc 4.5+, binutils 2.35.2
if using clang without clang's integrated assembler, and gdb 7.0+.
@@ -276,7 +282,7 @@ config DEBUG_INFO_DWARF4
config DEBUG_INFO_DWARF5
bool "Generate DWARF Version 5 debuginfo"
select DEBUG_INFO
- depends on !CC_IS_CLANG || (CC_IS_CLANG && (AS_IS_LLVM || (AS_IS_GNU && AS_VERSION >= 23502)))
+ depends on !CC_IS_CLANG || AS_IS_LLVM || (AS_IS_GNU && AS_VERSION >= 23502 && AS_HAS_NON_CONST_LEB128)
help
Generate DWARF v5 debug info. Requires binutils 2.35.2, gcc 5.0+ (gcc
5.0+ accepts the -gdwarf-5 flag but only had partial support for some
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 22adbf89cb31..41f3602fc8de 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -140,7 +140,7 @@ $(obj)/%.symtypes : $(src)/%.c FORCE
# LLVM assembly
# Generate .ll files from .c
quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@
- cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -o $@ $<
+ cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -fno-discard-value-names -o $@ $<
$(obj)/%.ll: $(src)/%.c FORCE
$(call if_changed_dep,cc_ll_c)
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index 7740ce3b29e8..8489a3402eb8 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -119,7 +119,7 @@ quiet_cmd_modpost = MODPOST $@
echo >&2 "WARNING: $(missing-input) is missing."; \
echo >&2 " Modules may not have dependencies or modversions."; \
echo >&2 " You may get many unresolved symbol warnings.";) \
- sed 's/ko$$/o/' $(or $(modorder-if-needed), /dev/null) | $(MODPOST) $(modpost-args) $(vmlinux.o-if-present) -T -
+ sed 's/ko$$/o/' $(or $(modorder-if-needed), /dev/null) | $(MODPOST) $(modpost-args) -T - $(vmlinux.o-if-present)
targets += $(output-symdump)
$(output-symdump): $(modorder-if-needed) $(vmlinux.o-if-present) $(moudle.symvers-if-present) $(MODPOST) FORCE
diff --git a/scripts/clang-tools/run-clang-tools.py b/scripts/clang-tools/run-clang-tools.py
index bb78c9bde55c..56f2ec8f0f40 100755
--- a/scripts/clang-tools/run-clang-tools.py
+++ b/scripts/clang-tools/run-clang-tools.py
@@ -45,13 +45,14 @@ def init(l, a):
def run_analysis(entry):
# Disable all checks, then re-enable the ones we want
- checks = "-checks=-*,"
+ checks = []
+ checks.append("-checks=-*")
if args.type == "clang-tidy":
- checks += "linuxkernel-*"
+ checks.append("linuxkernel-*")
else:
- checks += "clang-analyzer-*"
- checks += ",-clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling"
- p = subprocess.run(["clang-tidy", "-p", args.path, checks, entry["file"]],
+ checks.append("clang-analyzer-*")
+ checks.append("-clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling")
+ p = subprocess.run(["clang-tidy", "-p", args.path, ",".join(checks), entry["file"]],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
cwd=entry["directory"])
diff --git a/scripts/package/mkspec b/scripts/package/mkspec
index c920c1b18e7a..70392fd2fd29 100755
--- a/scripts/package/mkspec
+++ b/scripts/package/mkspec
@@ -97,8 +97,6 @@ $M $MAKE %{?_smp_mflags} INSTALL_MOD_PATH=%{buildroot} modules_install
$MAKE %{?_smp_mflags} INSTALL_HDR_PATH=%{buildroot}/usr headers_install
cp System.map %{buildroot}/boot/System.map-$KERNELRELEASE
cp .config %{buildroot}/boot/config-$KERNELRELEASE
- bzip2 -9 --keep vmlinux
- mv vmlinux.bz2 %{buildroot}/boot/vmlinux-$KERNELRELEASE.bz2
$S$M rm -f %{buildroot}/lib/modules/$KERNELRELEASE/build
$S$M rm -f %{buildroot}/lib/modules/$KERNELRELEASE/source
$S$M mkdir -p %{buildroot}/usr/src/kernels/$KERNELRELEASE