What COMPILERs are on the SGI
The native Silicon Graphics C compiler "cc", is the best compiler to use
for the SGI workstations. It is custom-tailored for the SGI's.
By default, "cc" behaves as if the option "-xansi" were set on the
command line. Other available options include:
-cckr traditional K&R C
-ansi ANSI/ISO C
-xansi ANSI/ISO C with same defines as -cckr
-ansiposix ANSI/ISO C and POSIX compliance
The highest level of optimization is specified with the "-O3" flag. You
may also want to use the "-mips2" option, which generates code using the
MIPS 2 instruction set (MIPS 1 plus R4000-specific extensions). For
more information about the MIPS 2 instruction set, and the
/usr/lib/mips2 libraries, see the "mips2 (5)" manual page:
athena% man 5 mips2
Note that Irix is an SVR4-based operating system (as opposed to s
BSD-based operating systems), so your source code should be modified to
deal with this.
If you really want to use "gcc" (the GNU C Compiler) on the SGI's, it is
available in the "gnu" locker:
athena% add gnu
athena% gcc filename.c
C++ compilers:
AT&T's CC compiler is not available for the SGI's, but g++ is
available from the "gnu" locker.
For the SGI's, these symbols are defined:
sgi
mips
unix
and you may also want to use:
_SVR4_SOURCE
_SGI_SOURCE
You can get a list of the default options by using "cc -v filename.c" or
"gcc -v filename.c".
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