There are certain warnings that the compiler will only check with optimization enabled. To get all warnings, -O2 must be included. -d On Nov 16, 2012, at 11:52 AM, Yauheni Zelenko wrote:

Hi, Darius!

But why warnings flags are mixed with optimization ones? I think these options should be independent.

Eugene. ________________________________________ From: [email protected] [[email protected]] On Behalf Of Darius Buntinas [[email protected]] Sent: Friday, November 16, 2012 9:41 AM To: [email protected] Cc: [email protected] Subject: Re: [mpich-discuss] Compiler optimization flags in MPICH 3.0 rc1

The --enable-strict flag adds -O2. Try --enable-strict=noopt.

-d

On Nov 15, 2012, at 7:06 PM, Yauheni Zelenko wrote:

...

Hi!

I tried to build optimize and debug version of MPICH 3.0 rc1 and noticed some problems with compiler optimization flags. Looks like -O2 is set implicitly.

For optimize configuration command like contains -O2 and -O3:

./configure --prefix=${InstallDir} \ --with-pm=hydra --with-device=ch3:nemesis \ --disable-chekpointing \ --enable-strict --enable-fast=O3 \ --disable-f77 --disable-fc \ CC=${GCCDir}/bin/gcc CFLAGS="-m32 -fPIC" \ CPP=${GCCDir}/bin/cpp \ CXX=${GCCDir}/bin/g++ CXXFLAGS="-m32 -fPIC" \ CXXCPP=${GCCDir}/bin/cpp

For debug one -O2, but optimization is disabled:

./configure --prefix=${InstallDir} \ --with-pm=hydra --with-device=ch3:nemesis \ --disable-chekpointing \ --enable-strict --disable-fast -enable-g=debug \ --disable-f77 --disable-fc \ CC=${GCCDir}/bin/gcc CFLAGS="-m32 -fPIC" \ CPP=${GCCDir}/bin/cpp \ CXX=${GCCDir}/bin/g++ CXXFLAGS="-m32 -fPIC" \ CXXCPP=${GCCDir}/bin/cpp

Eugene. _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss

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