TEXTREL issue

Accelerated Computing HPC Compilers Legacy PGI Compilers
1

Hi,

We have an issue with TEXTRELs. Is it compiler bug?

$ cat foo.c
extern int foo(int i);
int foo(int i){
return i+i;
}

$ pgcc -V

pgcc 11.10-0 64-bit target on x86-64 Linux -tp nehalem
Copyright 1989-2000, The Portland Group, Inc. All Rights Reserved.
Copyright 2000-2011, STMicroelectronics, Inc. All Rights Reserved.

$ pgcc -c -fPIC foo.c

$ ld -shared foo.o -o libfoo.so

$ readelf -a libfoo.so | grep TEXTREL
0x0000000000000016 (TEXTREL) 0x0

$ eu-findtextrel libfoo.so
the file containing the function ‘’ might not be compiled with -fpic/-fPIC

Thanks,
Vladimir

2

Hi Vladimir,

It looks like our stack tracing support is getting in your way. Try adding “–nodebugframe” to see if it works around your issue.

Hope this helps,
Mat

3

Hi Mat,

Maybe I misunderstand something:

$ pgcc -c -fPIC --nodebugframe foo.c ; ld -shared foo.o -o libfoo.so ; readelf -a libfoo.so | grep TEXTREL
pgcc-Error-Unknown switch: --nodebugframe
0x0000000000000016 (TEXTREL) 0x0

$ pgcc -c -fPIC -notraceback foo.c ; ld -shared foo.o -o libfoo.so ; readelf -a libfoo.so | grep TEXTREL
0x0000000000000016 (TEXTREL) 0x0


Thanks,
Vladimir

4

Hi Vladimir,

My apologies. I failed to test using an release compiler. The “–nodebugframe” named flag is only enabled in our internal development compiler.

Instead you can use the internal compiler flag “-Mx,120,0x400” to disable the debug frame used for stack trace support.

I have submitted a problem report (TPR#18140) and asked our engineers to investigate a more permanent fix.

Thanks,
Mat

5

Hi Mat,

I’ve checked the test, the option is really solves the issue. Will try to build the whole project.

Thanks,
Vladimir