I'm trying to build a shell version of hyphy in linux, but for some reason the version of gcc on this machine doesn't like the -fnonnull-objects flag.  I modified the build.sh script so that the source files compiled with gcc (as opposed to g++) have a different set of compiler flags, namely all the default ones except for -fnonnull-objects.  It compiles fine this way, and the binary seems to run fine, but since i don't know what -fnonnull-objects does, I wanted to make sure that it wasn't something crucial.

best,
Dan

Dear Dan,


wrote on Apr 12^th, 2005 at 4:21pm:

It compiles fine this way, and the binary seems to run fine, but since i don't know what -fnonnull-objects does, I wanted to make sure that it wasn't something crucial.

-fnonull-objects is an optimization flag (I think it may now be deprecated) which doesn't really affect anything. I'll remove it from the build script for the future - thanks for pointing this out.

What is your gcc version?

Cheers,
Sergei

My linux machine has gcc (GCC) 3.2.3 20030502 (Red Hat Linux 3.2.3-49).  

On the other hand, it builds fine with the -fnonnull-objects flag in os x using gcc (GCC) 3.3 20030304 (Apple Computer, Inc. build 1666)

And even with the older gcc, it only seems to be a problem with the code compiled with gcc, not the stuff that uses g++.

Dear Dan,

I've updated the build.sh script to use only non-deprecated flags. I assume that the g++ script simply ignored the flags it didn't recognize and did not pass them on to gcc.

For the Mac I suggest you use the -fast flag in place of all other optimization options (it's a line in build.sh which can be uncommented for Darwin builds), since it's an Apple macro which turns on all platform and CPU specific optimization and tuning flags.

Cheers,
Sergei