B::C - Perl compiler's C backend
perl -MO=C[,OPTIONS] foo.pl
This compiler backend takes Perl source and generates C source code corresponding to the internal structures that perl uses to run your program. When the generated C source is compiled and run, it cuts out the time which perl would have taken to load and parse your program into its internal semi-compiled form. That means that compiling with this backend will not help improve the runtime execution speed of your program but may improve the start-up time. Depending on the environment in which your program runs this may be either a help or a hindrance.
If there are any non-option arguments, they are taken to be names of objects to be saved (probably doesn't work properly yet). Without extra arguments, it saves the main program.
$SIG{BAR} = "foo"
.
A better fix, though, is just to change it to $SIG{BAR} = \&foo
. You can have multiple -u
options. The compiler tries to figure out which packages may possibly have
subs in which need compiling but the current version doesn't do it very
well. In particular, it is confused by nested packages (i.e. of the form A::B
) where package A
does not contain any subs.
perl -D
).
perl -MO=C,-ofoo.c foo.pl perl cc_harness -o foo foo.c
Note that cc_harness
lives in the B
subdirectory of your perl library directory. The utility called perlcc
may also be used to help make use of this compiler.
perl -MO=C,-v,-DcA bar.pl > /dev/null
Plenty. Current status: experimental.
Malcolm Beattie, mbeattie@sable.ox.ac.uk
If rather than formatting bugs, you encounter substantive content errors in these documents, such as mistakes in the explanations or code, please use the perlbug utility included with the Perl distribution.