Features in f77 5.0 That are New Since 4.2

f77 5.0 includes the following new and changed features:

• New options:

  • -fpover detects floating-point overflows in I/O processing.

  • -xcode=code specifies the memory address model on SPARC platforms.

  • -xcommonchk enables runtime checking for inconsistent COMMON block declarations.

  • -xmaxopt enables the OPT=n pragma and controls the maximum optimization level allowed by OPT pragmas in the source code.

  • -xprefetch allows the compiler to generate prefetch instructions on UltraSPARC II platforms.

  • -xvector allows the compiler to replace certain math library calls within DO loops with single calls to a vectorized math routine.

• Changed options:

  • -xcrossfile[=n] - optional level number added.

  • -fns[={yes|no}] - optional yes/no added.

  • -Ztha - option now ignored.

• New Features:

  • Compile for the 64-bit Solaris 7 environment on 64-bit SPARC platforms with -xarch=v9 or v9a.

  • Support in the I/O library for large files (larger than 2 Gigabytes).

  • Support for large arrays on 64-bit Solaris 7 environments.

  • Dynamic arrays (local arrays with dynamic size) implemented (see FORTRAN 77 Language Reference Manual).

  • The REDUCTION directive accepts arrays in the list of variables.

  • SPARC: A TASKCOMMON directive declares variables in COMMON to be private.

  • Fortran 90 style constants that allows specification of byte size (for example, 12345678_8 for a 64-bit, 8-byte, constant).

  • New optimization pragma allows setting the compilers optimization level on a routine by routine basis.

  • Year 2000 safe date_and_time() library routine.