HP aC++/HP C A.06.28 Programmer's Guide Integrity servers (769150-001, March 2014)

-Uname

name is the symbol name whose definition is removed from the preprocessor.

This option undefines any name that has initially been defined by the preprocessing stage of

compilation.

A name can be a definition set by the compiler. This is displayed when you specify the -v option.

A name can also be a definition that you have specified with the -D option on the command line.

The -D option has lower precedence than the -U option. If the same name is used in both, the -U

option and the -D option, the name is undefined regardless of the order of the options on the

command line.

Profiling Code Options

HP compilers provides the following options for profiling your code.

-G

At compile time, the -G option produces code that counts the number of times each arc in the call

graph is traversed. At link-time, when you are building an executable (but not a shared library)

-G picks up profiled versions of certain system libraries and picks up the gprof support library.

Example:

aCC -G file.C

The above example compiles file.C and creates the executable file a.out instrumented for use

with gprof.

See gprof(1) manpage for more information.

-p

At compile time, the -p option produces code that counts the number of times each routine is

called. At link-time, when you are building an executable (but not a shared library) -p picks up

profiled versions of certain system libraries and picks up the prof support library.

Example:

The following example compiles file.C and creates the executable file a.out instrumented for

use with prof.

aCC -p file.C

See the prof(1) manpage for more information.

+profilebucketsize

+profilebucketsize=[16|32]

This is a link-time option to support prof and gprof when building an executable, but not a

shared library. When prof or gprof startup code invokes sprofil, this option specifies the

size in bits of the counters used to record sampled values of the program counter.

The effect of this option can be overridden by setting the environment variable

LD_PROFILEBUCKET_SIZE when running the instrumented program. This environment variable

has no effect when building the instrumented program. Legal values are 16 (the default), and 32.

See gprof(1) and ld(1) manpages for more details.

74 Command-Line Options