The C backend for the Perl compiler. Generates C source code from Perl source; the generated code corresponds to Perl’s internal structures for running the program. Compiling with the C backend won’t speed up execution of your program, but it may improve start-up time. Invoke as:
perl -MO=C[,options
]program
in which program
is the name of the
Perl script to compile. Any non-option arguments are treated as the
names of objects to be saved; the main program is assumed if there are
no extra arguments. Possible options are:
Forces end of options.
Debug options, which can be concatenated or specified separately. Possible options are:
A
Prints AV information on saving
c
Prints COPs as they are processed, including file and line number
C
Prints CV information on saving
M
Prints MAGIC information on saving
o
Prints each OP as it’s processed
Forces individual optimizations on or off. Possible values of opt are:
cog
Copy-on-grow. PVs are declared and initialized statically.
no-cog
No copy-on-grow.
Sends output to filename instead of to STDOUT.
n
]Sets optimization level, in which
n
is an integer.
n
defaults to 1
. Currently, values of 1
and higher set cog
.
Forces apparently unused subroutines from package
Packname to be compiled, letting programs
use eval "foo( )"
even if
subroutine foo
isn’t seen to
be used at compile time. You can specify multiple
-u options.
Compiles verbosely.
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