[openib-general] respect CFLAGS in OSM

[Hal Rosenstock]

On Mon, 2006-01-23 at 09:10, Eitan Zahavi wrote:
> > 
> > Actually I'm not sure about this. I too see both but can't tell which
> > was honored and didn't see the specific text in gcc to indicate the
> > precedence here. Is it first option or last option of the same or
> > something else ?
> [EZ] This is exactly why I have added the traces from running gcc with
> the two options.
> If you look just below you will see the verbose report from cc1 showing
> that the last option wins by showing the exact list of optimization
> options used by the compiler. I have tested that on multiple gcc
> versions. (The command line itself is reported when you run gcc -v. Then
> you need to remove the -quite flag to get the correct level of
> verbosity. )

Got it. It's all the extra -f options that are enabled by -O2.

I will revert the patch to the OSM makefiles.

-- Hal

> > > >
> > > >
> swlab25:/home/eitan/SW/work/examples>/usr/libexec/gcc/i386-redhat-linux/
> > > > 4.0.0/cc1 getHostName.c getHostName.c -auxbase getHostName -O0 -O2
> > > > -version -o /tmp/ccet3OkS.s
> > > > GNU C version 4.0.0 20050519 (Red Hat 4.0.0-8) (i386-redhat-linux)
> > > >         compiled by GNU C version 4.0.0 20050519 (Red Hat
> 4.0.0-8).
> > > > GGC heuristics: --param ggc-min-expand=99 --param
> > > > ggc-min-heapsize=129317
> > > > options passed:  -auxbase -O0 -O2
> > > > options enabled:  -falign-loops -fargument-alias
> -fbranch-count-reg
> > > >  -fcaller-saves -fcommon -fcprop-registers -fcrossjumping
> > > >  -fcse-follow-jumps -fcse-skip-blocks -fdefer-pop
> > > >  -fdelete-null-pointer-checks -feliminate-unused-debug-types
> > > >  -fexpensive-optimizations -fforce-mem -ffunction-cse -fgcse
> -fgcse-lm
> > > >  -fguess-branch-probability -fident -fif-conversion
> -fif-conversion2
> > > >  -fivopts -fkeep-static-consts -fleading-underscore
> -floop-optimize
> > > >  -floop-optimize2 -fmath-errno -fmerge-constants
> > > > -foptimize-register-move
> > > >  -foptimize-sibling-calls -fpcc-struct-return -fpeephole
> -fpeephole2
> > > >  -fregmove -freorder-blocks -freorder-functions
> -frerun-cse-after-loop
> > > >  -frerun-loop-opt -fsched-interblock -fsched-spec
> > > > -fsched-stalled-insns-dep
> > > >  -fsplit-ivs-in-unroller -fstrength-reduce -fstrict-aliasing
> > > > -fthread-jumps
> > > >  -ftrapping-math -ftree-ccp -ftree-ch -ftree-copyrename -ftree-dce
> > > >  -ftree-dominator-opts -ftree-dse -ftree-fre -ftree-loop-im
> > > >  -ftree-loop-ivcanon -ftree-loop-optimize -ftree-lrs -ftree-pre
> > > > -ftree-sra
> > > >  -ftree-ter -funit-at-a-time -fvar-tracking
> -fzero-initialized-in-bss
> > > >  -m80387 -mhard-float -mno-soft-float -mieee-fp -mfp-ret-in-387
> > > >  -mno-red-zone -mtls-direct-seg-refs -mtune=i386 -march=i386
> > > >
> > > >
> swlab25:/home/eitan/SW/work/examples>/usr/libexec/gcc/i386-redhat-linux/
> > > > 4.0.0/cc1 getHostName.c getHostName.c -auxbase getHostName -O2 -O0
> > > > -version -o /tmp/ccet3OkS.s
> > > > GNU C version 4.0.0 20050519 (Red Hat 4.0.0-8) (i386-redhat-linux)
> > > >         compiled by GNU C version 4.0.0 20050519 (Red Hat
> 4.0.0-8).
> > > > GGC heuristics: --param ggc-min-expand=99 --param
> > > > ggc-min-heapsize=129317
> > > > options passed:  -auxbase -O2 -O0
> > > > options enabled:  -falign-loops -fargument-alias
> -fbranch-count-reg
> > > >  -fcommon -feliminate-unused-debug-types -ffunction-cse -fgcse-lm
> > > > -fident
> > > >  -fivopts -fkeep-static-consts -fleading-underscore
> -floop-optimize2
> > > >  -fmath-errno -fpcc-struct-return -fpeephole -fsched-interblock
> > > >  -fsched-spec -fsched-stalled-insns-dep -fsplit-ivs-in-unroller
> > > >  -ftrapping-math -ftree-loop-im -ftree-loop-ivcanon
> -ftree-loop-optimize
> > > >  -funit-at-a-time -fvar-tracking -fzero-initialized-in-bss -m80387
> > > >  -mhard-float -mno-soft-float -mieee-fp -mfp-ret-in-387
> -mno-red-zone
> > > >  -mtls-direct-seg-refs -mtune=i386 -march=i386
> > > >