NAG Fortran Compiler, Release 7.2: Description of <CODE>dbx90</CODE>

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## 3.2 Description of `dbx90`

dbx90 is a Fortran-oriented debugger for use with the NAG Fortran Compiler on Unix-like systems (e.g. Linux, Solaris). Its syntax is quite similar to that of dbx, which it invokes as a sub-process to carry out the actual machine-dependent debugging commands. (On gcc-based implementations, gdb is used.)

The program to be debugged should be compiled and linked with the -g90 option. This creates a debug information (`.g90`) file for each Fortran source file.

If the environment variable `DBX90_DBXPATH` is defined, dbx90 will use it to locate the native debugger instead of the built-in path.