PGI Frequently Asked Questions
Questions and answers to many common issues and concerns.
Most of the problems reported by users have been encountered and solved before, or reflect a common misconception. This page lists problems and questions we have run into with the PGI® products, along with suggested solutions or workarounds.
- Current Release Questions
- Installation and Licensing Questions and Problems
- Compilation Questions and Problems
- Linking Questions and Problems
- Execution Questions and Problems
- Portability Questions
- Inter-Language Questions and Problems
- MPI Questions
A word about coding programs in a portable manner: Programs last much longer than anyone plans, especially if they work well. So it's a good idea to write them in a fashion that makes them independent of the machine or the compiler company you currently use. Often the response to a user's problem is that they are not coding in a portable fashion, because what they have done performs differently on different machines. Changing code now to remove platform/compiler dependencies can pay off in the long run.
Current Release Questions
- What new features are in the latest release?
- What are the latest releases?
- How do I get the latest release?
- What should I know about the latest releases?
- How do I find out if my license will work with the current release?
- How do I find out if I qualify for a current release license?
- What is a subscription?
- How does this release differ from the previous release?
- Any known problems with the current releases?
- What problems have been fixed in this release?
Installation and Licensing Questions and Problems
- Which releases of PGI compilers work with each Linux distribution?
- Which releases of PGI compilers work with each Windows version?
- Which releases of PGI Visual Fortran compilers work with each Windows version?
- Can I install PVF on a platform with Visual Studio Express installed?
- Which releases of PGI compilers work with each Mac OS X version on Intel-based Macs?
- What type of licenses are available?
- Can you give me an overview of a PGI license?
- What are the most common license problems?
- What is the hostid?
- How do i know if the Linux hostid has changed, and what should i do then?
- If the hostid has not changed and the license manager fails, what next?
- Okay, the simple things check out, what next?
- Who do I contact with license questions?
- Where can I find my PIN?
- How do I create/delete/move a license?
- Why can't I use my license server to serve more than one set of PGI license keys?
- How do I update libacml with newer versions?
- What do I do when lmutil lmhostid returns a blank?
- How do I use a Windows machine as a floating license server?
- How do I use a Solaris machine as a floating license server?
- Why am I seeing the error '$PGI/linux86-64/12.*/bin/lmutil: No such file or directory'?
- Can I check-out one of our network floating licenses to use on the road?
Compilation Questions and Problems
- I'm new to PGI. Which compiler flags should I be using?
- What are intrinsics and how do I call them directly?
- How do I remove the 'FORTRAN STOP' message when 'STOP' is encountered?
- What do I do when the compiler intermittently fails with SIG interrupt or bad output?
- Why don't the PGI Fortran compilers handle #include statements the same as include statements?
- How do I easily call pgcc as cc?
- Why does the F2003 SIZE intrinsic not handle large arrays properly in 64-bit?
Linking Questions and Problems
- Can you give a general overview of linker problems?
- How do I fix a ": undefined reference to 'f__xargc'" problem?
- How do I solve the underscore problems?
- How do I tell the linker to ignore unresolved references?
- Can I use the Intel MKL with PGI compilers and if so, how do I do it?
- How can I use the Linux LIBRARY_PATH and LDFLAGS environment with the PGI compilers?
- What do I do when the linker complains "ld: cannot open -lgcc:No such file or directory"?
- How do I generate a link map?
Execution Questions and Problems
- What can I do about precision problems?
- How come we get different answers on one platform versus a linux x86 platform?
- Why when I execute do I get the error message 'libpgc.so: cannot open shared object file'?
- Do you have an example of using -byteswapio?
- Do you have any relative performance numbers?
- Does the license manager allow me to execute on other platforms?
- Why does read(9,rec=recnr,end=100,err=101,iostat=ios) act differently on other compilers?
- (32-bit Linux compilers) Why can't my compiled code handle even half of the 2GB of memory in my system?
- When executing, why do I get a stack overflow on Windows?
- When I compile with -Ktrap=inexact, why does the program get so many exceptions?
- Why do I get 'illegal instruction' exceptions when I run the program on other platforms?
- Why to I get different answers with -r8 set when I declared all my variables as REAL*8?
- Why does date_and_time(DATE) return 20 for the century?
Portability Questions
- What is the Linux Portability Package?
- Who needs the Portability Package?
- What do you mean by portability?
- Will every program I build run everywhere?
- What Linux versions have you tried out?
- How do I install the portability package?
- Are there licensing issues with the portability package?
- What else should developers consider for portability?
- How do I run a PGI developed program on a Windows machine without PGI compilers installed?
Inter-Language Questions and Problems
- How do you call pgf77-pgf90-pghpf routines from g++?
- what arguments can be passed from C++ to f90?
- How do you pass data between f77 and C/C++ routines.?
- How do you pass string data from HPF to an external C function?
- How do you pass data between f77 and f90?
- How about an example of hpf calling every type language routine?
- NT Visual C++ Interfacing