Detect compiler with #ifdef

Question

I'm trying to build a small code that works across multiple platforms and compilers. I use assertions, most of which can be turned off, but when compiling with PGI's pgicpp using -mp for OpenMP support, it automatically uses the --no_exceptions option: everywhere in my code with a "throw" statement generates a fatal compiler error. ("support for exception handling is disabled")

Is there a defined macro I can test to hide the throw statements on PGI? I usually work with gcc, which has GCC_VERSION and the like. I can't find any documentation describing these macros in PGI.

Feldstein

clang #2658961 | VC #15128022 – Sisco

Answer 1

Take a look at the Pre-defined C/C++ Compiler Macros project on Sourceforge.

PGI's compiler has a __PGI macro.

Also, take a look at libnuwen's compiler.hh header for a decent way to 'normalize' compiler versioning macros.

Tommietommy

Second link is dead :( – Jorin

Answer 2

You could try this to see what macros are predefined by the compiler:

pgcc -dM

Maybe that will reveal a suitable macro you can use.

Dermatoglyphics

Indeed. The output of that is shown at pgroup.com/support/tprs_70.htm, and there's PGI (mentioned above), and __PGIC, PGIC_MINOR, and PGIC_PATCHLEVEL, which give the major, minor, and patchlevel parts of the compiler version number. – Towill

And there's the joy of the parser taking double underscores and doing entertaining things with them. 'PGI' is prefixed with double underscores; the other three are both prefixed and suffixed with them. – Towill

Answer 3

Have you looked at the boost headers? Supposing they support PGI, they will have found a way to detect it. You could use that. I would start to search somewhere in boost/config.

Meganmeganthropus