Code Profiling Utilities Manual

Optimizing a Program Using Profile-Guided

Optimization

HP Code Profiling Utilities Manual—542684-003

6-2

Location of Source Files

The DPI files input to the compilers contain the names of the source files that were

compiled with profgen. By default, these are fully qualified source file names, following

naming conventions for the respective host environments (Guardian, OSS, or

Windows). When you compile with the profuse option, the compiler expects to find the

files in the same location as they were when compiled with the profgen option. If you

have moved these files to a different location after compiling with profgen, the compiler

will be unable to find them when compiling with profuse. However, the compilers

provide an option that makes it possible for these files to be in different locations.

Using the basename Option

The basename compiler option makes it possible for source files compiled with the

profuse option to be in different locations than they were when compiled with the

profgen option. In particular, the source files can be in different environments

(Guardian, OSS, or Windows) for profgen and profuse compilations.

The basename option is summarized in Table 6-2.

If you specify the basename option on the compiler command line, then, when the

process is executed, only the base part of the fully qualified source file path name (the

file name) will be included in the raw data file. For example, assume the following OSS

command line:

c89 /homedir/subdir1/myprog.c -Wprofgen -Wbasename

Table 6-2. basename Option

Option Name

Supported

Environment Compiler Description

BASENAME Guardian CCOMP

CPPCOMP

EPTAL

Include only the base part of the fully-

qualified source file name in the raw

data file created during process

execution.

-Wbasename OSS, Windows c89, c99 Include only the base part of the fully-

qualified source file name in the raw

data file created during process

execution.

-basename Windows eptal Include only the base part of the fully-

qualified source file name in the raw

data file created during process

execution.