topic Re: Re:Segmentation fault on mac os with -qopenmp in Intel® Fortran Compiler

Segmentation fault on mac os with -qopenmp

Polk__Jay — Tue, 15 Dec 2020 00:57:49 GMT

I am using intel fortran on a mac with catalina. My program compiles and runs fine as long as I don't include -qopenmp. When i include that option, I get a segmentation fault. Increasing the stack size from the shell doesn't fix it. Older posts suggest that it can be increased using -stack_size, but it doesn't seem to recognize that in my version. Is there another way to increase stack size, or other potential causes?

Thanks--Jay

Re:Segmentation fault on mac os with -qopenmp

Ron_Green — Wed, 16 Dec 2020 21:43:07 GMT

I will investigate this. I also am surprised that the compiler does not have the -stack_size option. At least I don't see it in -help.

Re: Re:Segmentation fault on mac os with -qopenmp

Polk__Jay — Mon, 21 Dec 2020 08:02:41 GMT

Hi Ronald,

any luck with the stack size issue?

Thanks--Jay

Re: Re:Segmentation fault on mac os with -qopenmp

Ron_Green — Tue, 22 Dec 2020 17:49:04 GMT

stacksize is set by the linker. The syntax is to pass -stack_size to the linker. you use -Wl, for passing args to the linker like this

ifort -Wl,-stack_size -Wl,0x1000000 -o hello hello.f90

sorry it took so long to get back to this. Let me know if this works.