Compiling Fortran 2003 programs
The f2003, xlf2003, and xlf2003_r commands make your programs conform more closely to the Fortran 2003 Standard than do the other invocation commands.The Fortran 2003 commands accept free source form by default. I/O formats for the Fortran 2003 commands are the same as for the f95, xlf95, xlf95_r, and xlf95_r7 commands. The Fortran 2003 commands format infinity and NaN floating-point values differently from previous commands. The Fortran 2003 commands enable polymorphism by default.
By default, the f2003, xlf2003,
and xlf2003_r commands
do not conform completely to the Fortran 2003 standard.
If you need full compliance, compile with the following additional
compiler suboptions:
-qlanglvl=2003std -qnodirective -qnoescape -qfloat=nomaf:rndsngl:nofold
-qnoswapomp -qstrictieeemodXLFRTEOPTS="err_recovery=no:langlvl=2003std:iostat_end=2003std:
internal_nldelim=2003std"
