Message-ID: <CALaQ_hrJC07E3vL9PE+JusgLZvxwcBFC89P8HzyT42NjC2pYDg@mail.gmail.com>
Date: Tue, 8 Apr 2025 06:22:10 -0500
From: Nathan Royce <nroycea+kernel@...il.com>
To: John Stultz <jstultz@...gle.com>
Cc: Thomas Gleixner <tglx@...utronix.de>, LKML <linux-kernel@...r.kernel.org>
Subject: "BC" Failure When Using "POSIXLY_CORRECT" Environment Variable

When the "POSIXLY_CORRECT" variable is `unset`, the build continues.
bc.1 man:
*****
       -s, --standard
             Process exactly the POSIX bc language.
      POSIXLY_CORRECT
             This is the same as the -s option.
*****

Failure output:
*****
<...>
make -f /<pathTo>/scripts/Makefile.build obj=. prepare
set -e; mkdir -p include/generated/; trap "rm -f
include/generated/.tmp_timeconst.h" EXIT; { echo 100 | bc -q
/<pathTo>/kernel/time/timeconst.bc; } >
include/generated/.tmp_timeconst.h; if [ ! -r
include/generated/timeconst.h ] || ! cmp -s
include/generated/timeconst.h include/generated/.tmp_timeconst.h; then
: '  UPD     include/generated/timeconst.h'; mv -f
include/generated/.tmp_timeconst.h include/generated/timeconst.h; fi
/<pathTo>/kernel/time/timeconst.bc 6: Error: multiple letter name - gcd
/<pathTo>/kernel/time/timeconst.bc 12: Error: return expression
requires parenthesis
/<pathTo>/kernel/time/timeconst.bc 17: Error: multiple letter name - fmul
/<pathTo>/kernel/time/timeconst.bc 17: Error: return expression
requires parenthesis
/<pathTo>/kernel/time/timeconst.bc 23: Error: multiple letter name - fadj
/<pathTo>/kernel/time/timeconst.bc 24: Error: multiple letter name - gcd
/<pathTo>/kernel/time/timeconst.bc 26: Error: return expression
requires parenthesis
/<pathTo>/kernel/time/timeconst.bc 34: Error: multiple letter name - fmuls
/<pathTo>/kernel/time/timeconst.bc 36: Error: multiple letter name - fmul
/<pathTo>/kernel/time/timeconst.bc 38: Error: newline not allowed
/<pathTo>/kernel/time/timeconst.bc 38: Error: return expression
requires parenthesis
/<pathTo>/kernel/time/timeconst.bc 40: Error: return expression
requires parenthesis
/<pathTo>/kernel/time/timeconst.bc 43: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 44: Error: multiple letter name - timeconst
/<pathTo>/kernel/time/timeconst.bc 44: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 45: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 45: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 46: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 48: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 49: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 51: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 52: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 54: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 54: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 55: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 56: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 58: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 59: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 60: Error: else clause in if statement
/<pathTo>/kernel/time/timeconst.bc 61: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 61: Error: multiple letter name - fmuls
/<pathTo>/kernel/time/timeconst.bc 63: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 63: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 63: Error: multiple letter name - fmul
/<pathTo>/kernel/time/timeconst.bc 64: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 64: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 64: Error: multiple letter name - fadj
/<pathTo>/kernel/time/timeconst.bc 66: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 68: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 68: Error: multiple letter name - fmuls
/<pathTo>/kernel/time/timeconst.bc 70: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 70: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 70: Error: multiple letter name - fmul
/<pathTo>/kernel/time/timeconst.bc 71: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 71: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 71: Error: multiple letter name - fadj
/<pathTo>/kernel/time/timeconst.bc 73: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 76: Error: multiple letter name - cd
/<pathTo>/kernel/time/timeconst.bc 76: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 76: Error: multiple letter name - gcd
/<pathTo>/kernel/time/timeconst.bc 77: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 77: Error: multiple letter name - cd
/<pathTo>/kernel/time/timeconst.bc 78: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 78: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 78: Error: multiple letter name - cd
/<pathTo>/kernel/time/timeconst.bc 79: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 79: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 79: Error: multiple letter name - cd
/<pathTo>/kernel/time/timeconst.bc 80: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 80: Error: multiple letter name - cd
/<pathTo>/kernel/time/timeconst.bc 81: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 83: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 83: Error: multiple letter name - fmuls
/<pathTo>/kernel/time/timeconst.bc 85: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 85: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 85: Error: multiple letter name - fmul
/<pathTo>/kernel/time/timeconst.bc 86: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 86: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 86: Error: multiple letter name - fadj
/<pathTo>/kernel/time/timeconst.bc 88: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 90: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 90: Error: multiple letter name - fmuls
/<pathTo>/kernel/time/timeconst.bc 92: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 92: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 92: Error: multiple letter name - fmul
/<pathTo>/kernel/time/timeconst.bc 93: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 93: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 93: Error: multiple letter name - fadj
/<pathTo>/kernel/time/timeconst.bc 95: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 98: Error: multiple letter name - cd
/<pathTo>/kernel/time/timeconst.bc 98: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 98: Error: multiple letter name - gcd
/<pathTo>/kernel/time/timeconst.bc 99: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 99: Error: multiple letter name - cd
/<pathTo>/kernel/time/timeconst.bc 100: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 100: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 100: Error: multiple letter name - cd
/<pathTo>/kernel/time/timeconst.bc 101: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 101: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 101: Error: multiple letter name - cd
/<pathTo>/kernel/time/timeconst.bc 102: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 102: Error: multiple letter name - cd
/<pathTo>/kernel/time/timeconst.bc 104: Error: multiple letter name - cd
/<pathTo>/kernel/time/timeconst.bc 104: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 104: Error: multiple letter name - gcd
/<pathTo>/kernel/time/timeconst.bc 105: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 105: Error: multiple letter name - cd
/<pathTo>/kernel/time/timeconst.bc 106: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 106: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 106: Error: multiple letter name - cd
/<pathTo>/kernel/time/timeconst.bc 107: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 107: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 107: Error: multiple letter name - cd
/<pathTo>/kernel/time/timeconst.bc 108: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 108: Error: multiple letter name - cd
/<pathTo>/kernel/time/timeconst.bc 109: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 111: Error: print statement
/<pathTo>/kernel/time/timeconst.bc 116: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 116: Error: read function
/<pathTo>/kernel/time/timeconst.bc 117: Error: multiple letter name - hz
/<pathTo>/kernel/time/timeconst.bc 117: Error: multiple letter name - timeconst
set -e; mkdir -p include/generated/; trap "rm -f
include/generated/.tmp_bounds.h" EXIT; {        echo "#ifndef
__LINUX_BOUNDS_H__"; echo "#define __LINUX_BOUNDS_H__"; echo "/*";
echo " * DO NOT MODIFY."; echo " *"; echo " * This file was generated
by Kbuild"; echo " */"; echo ""; sed -ne
's:^[[:space:]]*\.ascii[[:space:]]*"\(.*\)".*:\1:;
/^->/{s:->#\(.*\):/* \1 */:; s:^->\([^ ]*\) [\$#]*\([^ ]*\)
\(.*\):#define \1 \2 /* \3 */:; s:->::; p;}' < kernel/bounds.s; echo
""; echo "#endif"; } > include/generated/.tmp_bounds.h; if [ ! -r
include/generated/bounds.h ] || ! cmp -s include/generated/bounds.h
include/generated/.tmp_bounds.h; then : '  UPD
include/generated/bounds.h'; mv -f include/generated/.tmp_bounds.h
include/generated/bounds.h; fi
# CC      arch/arm/kernel/asm-offsets.s
  /<pathTo>/toolchain/bin/clang
-Wp,-MMD,arch/arm/kernel/.asm-offsets.s.d -nostdinc
-I/<pathTo>/arch/arm/include -I./arch/arm/include/generated
-I/<pathTo>/include -I./include -I/<pathTo>/arch/arm/include/uapi
-I./arch/arm/include/generated/uapi -I/<pathTo>/include/uapi
-I./include/generated/uapi -include
/<pathTo>/include/linux/compiler-version.h -include
/<pathTo>/include/linux/kconfig.h -include
/<pathTo>/include/linux/compiler_types.h -D__KERNEL__
--target=arm-linux-gnueabi -fintegrated-as
-Werror=unknown-warning-option -Werror=ignored-optimization-argument
-Werror=option-ignored -Werror=unused-command-line-argument
-mlittle-endian -D__LINUX_ARM_ARCH__=6 -ffile-prefix-map=/<pathTo>/=
-std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE
-fno-strict-aliasing -fno-dwarf2-cfi-asm -mtp=cp15 -mabi=aapcs-linux
-mfpu=vfp -funwind-tables -meabi gnu -Wa,-W -march=armv6k
-mtune=arm1136j-s -msoft-float -Uarm -fno-delete-null-pointer-checks
-Os -fstack-protector-strong -ftrivial-auto-var-init=zero -pg
-fstrict-flex-arrays=3 -fno-strict-overflow -fno-stack-check -Wall
-Wundef -Werror=implicit-function-declaration -Werror=implicit-int
-Werror=return-type -Werror=strict-prototypes -Wno-format-security
-Wno-trigraphs -Wno-frame-address -Wno-address-of-packed-member
-Wmissing-declarations -Wmissing-prototypes -Wframe-larger-than=1024
-Wno-gnu -Wno-format-overflow-non-kprintf
-Wno-format-truncation-non-kprintf -Wvla -Wno-pointer-sign
-Wcast-function-type -Wimplicit-fallthrough -Werror=date-time
-Werror=incompatible-pointer-types -Wenum-conversion -Wextra -Wunused
-Wno-unused-but-set-variable -Wno-unused-const-variable
-Wno-format-overflow -Wno-override-init -Wno-pointer-to-enum-cast
-Wno-tautological-constant-out-of-range-compare -Wno-unaligned-access
-Wno-enum-compare-conditional -Wno-missing-field-initializers
-Wno-type-limits -Wno-shift-negative-value -Wno-enum-enum-conversion
-Wno-sign-compare -Wno-unused-parameter -I/<pathTo>/. -I.
-DKBUILD_MODFILE='"./asm-offsets"' -DKBUILD_BASENAME='"asm_offsets"'
-DKBUILD_MODNAME='"asm_offsets"' -D__KBUILD_MODNAME=kmod_asm_offsets
-fverbose-asm -S -o arch/arm/kernel/asm-offsets.s
/<pathTo>/arch/arm/kernel/asm-offsets.c
In file included from /<pathTo>/arch/arm/kernel/asm-offsets.c:12:
In file included from /<pathTo>/include/linux/mm.h:7:
In file included from /<pathTo>/include/linux/gfp.h:7:
In file included from /<pathTo>/include/linux/mmzone.h:22:
In file included from /<pathTo>/include/linux/mm_types.h:16:
In file included from /<pathTo>/include/linux/uprobes.h:18:
In file included from /<pathTo>/include/linux/timer.h:6:
In file included from /<pathTo>/include/linux/ktime.h:25:
In file included from /<pathTo>/include/linux/jiffies.h:14:
./include/generated/timeconst.h:1:1: error: expected identifier or '('
    1 | 100
      | ^
<...>
*****

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