Which C/C++ Compilers do enterprises use on Linux?

Question

I have been using the GCC Compiler for months, which is great, and works very well. But I wonder which C++ Compiler do big/medium enterprises use for high optimizations/performance in Linux (x86, PowerPC...).

It may seem a very stupid question, but I havent found the answer anywhere.

As far as I know, the best PowerPC Compiler is the XL, but x86 I dont know anything.

EDIT: Thanks a lot for all the answers. They were all very helpful. You have convinced me to use GCC ;) Regards!

Answer 1

In the places I have worked we have always used gcc, even for embedded applications/software.

Performance improvements are much more likely to come from your code rather than your compiler choice anyway!