id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
2773,Sun toolset uses -fast by default,g_sauthoff@…,Vladimir Prus,"With --toolset=sun, -fast is enabled by default.

The -fast option of the Sun CC enables optimized codegen for all the hardware features, which are available for the CPU, where the CC process is currently running.

For example if you compile with -fast on an Solaris/Opteron systems, you code very likely will contain 3dnow-instruction. If you want to share the binaries with Solaris/Intel-Xeon-64-bit systems you have a problem.

Thus, I suggest a default optimization level of '-O' for the Sun CC (e.g. with --toolset=sun). Or '-xOsomething' if you will.

The situation is comparable to using -O or -O2 with gcc, and not -march=native.",Bugs,closed,Boost 1.39.0,build,Boost 1.37.0,Problem,fixed,,