Save the changes to your source.
Type fix at the dbx prompt.
Although you can do an unlimited number of fixes, if you have done several fixes in a row, consider rebuilding your program. The fix command changes the program image in memory, but not on the disk. As you do more fixes, the memory image gets out of sync with what is on the disk.
The fix command does not make the changes within your executable file, but only changes the .o files and the memory image. Once you have finished debugging a program, you must rebuild your program to merge the changes into the executable. When you quit debugging, a message reminds you to rebuild your program.
If you invoke the fix command with an option other than -a and without a file name argument, only the current modified source file is fixed.
When fix is invoked, the current working directory of the file that was current at the time of compilation is searched before executing the compilation line. There might be problems locating the correct directory due to a change in the file system structure from compilation time to debugging time. To avoid this problem, use the command pathmap, which creates a mapping from one path name to another. Mapping is applied to source paths and object file paths.