To check the GNU make version. Used by the LTO Kconfig. LTO with MODVERSIONS will fail in generating correct CRC because the makefile rule doesn't work for make with version 3.8X.[1] Thus we need to check make version during selecting on LTO Kconfig. Add CONFIG_MAKE_VERSION which means MAKE_VERSION in canonical digits for arithmetic comparisons. [1] https://lore.kernel.org/lkml/20210616080252.32046-1-lecopzer.chen@xxxxxxxxxxxx/ Signed-off-by: Lecopzer Chen <lecopzer.chen@xxxxxxxxxxxx> --- Makefile | 2 +- init/Kconfig | 4 ++++ scripts/make-version.sh | 13 +++++++++++++ 3 files changed, 18 insertions(+), 1 deletion(-) create mode 100755 scripts/make-version.sh diff --git a/Makefile b/Makefile index 88888fff4c62..2402745b2ba9 100644 --- a/Makefile +++ b/Makefile @@ -516,7 +516,7 @@ CLANG_FLAGS := export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL -export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX +export PERL PYTHON3 CHECK CHECKFLAGS MAKE MAKE_VERSION UTS_MACHINE HOSTCXX export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE diff --git a/init/Kconfig b/init/Kconfig index 55f9f7738ebb..ecc110504f87 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -86,6 +86,10 @@ config CC_HAS_ASM_INLINE config CC_HAS_NO_PROFILE_FN_ATTR def_bool $(success,echo '__attribute__((no_profile_instrument_function)) int x();' | $(CC) -x c - -c -o /dev/null -Werror) +config MAKE_VERSION + int + default $(shell,$(srctree)/scripts/make-version.sh $(MAKE_VERSION)) + config CONSTRUCTORS bool diff --git a/scripts/make-version.sh b/scripts/make-version.sh new file mode 100755 index 000000000000..3a451db3c067 --- /dev/null +++ b/scripts/make-version.sh @@ -0,0 +1,13 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# +# Print the GNU make version in a 5 or 6-digit form. + +set -e + +# Convert the version string x.y.z to a canonical 5 or 6-digit form. +IFS=. +set -- $1 + +# If the 2nd or 3rd field is missing, fill it with a zero. +echo $((10000 * $1 + 100 * ${2:-0} + ${3:-0})) -- 2.18.0
