This page is for supplementary information relating to implementations of Release 6.1 of the NAG Fortran Compiler. It may be augmented over the life-time of the products if further pertinent information becomes available.
The Fortran-aware debugger, dbx90, uses gdb. This is no longer supplied by Apple on Mavericks (on earlier versions it is included in the Xcode command tools). However, gdb can be downloaded from http://www.gnu.org/software/gdb/download/ and built from source (using gcc). It will then need to be signed (self-signed is ok) and installed; following this, dbx90 will work. This has been tested with GDB 7.7.1.
An alternative to building and signing gdb would be to download from a third-party website that supplies gdb.
The NAG Fortran Builder (for Mac OSX 10.9 and later) contains a builtin debugger, and this can be used instead of dbx90.
Crashes within Apple's OpenGL library in 32-bit mode on macOS Sierra
have been observed.
To work around these you must enable non-stop arithmetic
via