Dear all:
I am generating different optimization flags using the GCC compiler
randomly. On some combinations I am getting the error messages. One
such combination is given below:
gcc -O3 -lm -fno-peephole2 -freorder-blocks -falign-loops=19
-fno-zero-initialized-in-bss -fno-optimize-register-move
-fsignaling-nans -fno-data-sections -fdefault-inline
-fno-optimize-sibling-calls -ffast-math -fno-sched2-use-traces
-fbranch-target-load-optimize2 -fprofile-generate
-fno-sched-spec-load -fcse-follow-jumps -frerun-cse-after-loop
-fvpt -fno-omit-frame-pointer -fno-math-errno -fno-sched-spec
-fno-defer-pop -fbranch-count-reg -funroll-loops -fno-if-conversion2
-fno-unroll-all-loops -fschedule-insns -fno-function-sections
-fsched-spec-load-dangerous -fno-inline-functions -fno-align-labels
-fcse-skip-blocks -fno-delayed-branch -fno-merge-constants
-fno-delete-null-pointer-checks -fsched-interblock
-fno-cprop-registers -fno-sched-stalled-insns -frename-registers
-fno-if-conversion -fpeephole -fbranch-target-load-optimize
-fno-thread-jumps -fstrict-aliasing -fno-expensive-optimizations
-fno-force-addr -ffinite-math-only -fno-unit-at-a-time -fno-inline
-fno-rerun-loop-opt -fsingle-precision-constant -fno-align-jumps
-fno-function-cse -fweb -fgcse-lm -fgcse -freorder-functions
-fpeel-loops -fno-prefetch-loop-arrays
-fno-unsafe-math-optimizations -fguess-branch-probability
-fno-keep-inline-functions -fno-merge-all-constants -fschedule-insns2
-fno-trapping-math -fkeep-static-consts -fgcse-las -ftracer
-fno-sched2-use-superblocks -fno-strength-reduce -fno-profile-values
-fno-profile-use -fno-align-functions -floop-optimize
-fsched-stalled-insns-dep=28 -ffloat-store -fgcse-sm
-fno-unswitch-loops -fno-force-mem -fno-regmove
-fbranch-probabilities -frounding-math *.c
The error messages using the above combination of flags are:
In file included from /usr/include/sys/types.h:223,
from /usr/include/stdlib.h:438,
from test.c:3:
/usr/include/sys/sysmacros.h: In function gnu_dev_major:
/usr/include/sys/sysmacros.h:45: error: coverage mismatch for function
gnu_dev_majorwhile reading counter arcs
/usr/include/sys/sysmacros.h:45: error: checksum is 4aabd925 instead of 46dacb4d
/usr/include/sys/sysmacros.h: In function gnu_dev_minor:
/usr/include/sys/sysmacros.h:51: error: coverage mismatch for function
gnu_dev_minor while reading counter arcs
/usr/include/sys/sysmacros.h:51: error: checksum is 2fd1d84 instead of a547d799
/usr/include/sys/sysmacros.h: In function gnu_dev_makedev:
/usr/include/sys/sysmacros.h:59: error: coverage mismatch for function
gnu_dev_makedev while reading counter arcs
/usr/include/sys/sysmacros.h:59: error: checksum is bbf96c2 instead of d1fb9096
test.c: In function main:
test.c:31: error: coverage mismatch for function main while reading counter arcs
test.c:31: error: checksum is 1f077c85 instead of f9a54475
test.c is a C file which I am compiling. It consists of simple nested loops.
Thanks in advance for your help.
--
Regards,
Wei Li
