Reini Urban > B-C > perlcc


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Source   Latest Release: B-C-1.55_02


perlcc - generate executables from Perl programs


    perlcc            # Compiles into executable 'a.out'
    perlcc -o hello   # Compiles into executable 'hello'

    perlcc -O          # Compiles using the optimised CC backend
    perlcc -O3         # Compiles with C, using -O3 optimizations
    perlcc -B          # Compiles using the bytecode backend
    perlcc -B -m       # Compiles a module to file.pmc

    perlcc -c          # Creates a C file, 'file.c'
    perlcc -S -o hello # Keep C file
    perlcc -c out.c    # Creates a C file, 'out.c' from 'file'
    perlcc --staticxs -r -o hello # Compiles,links and runs with
                               # XS modules static/dynaloaded

    perlcc -e 'print q//'      # Compiles a one-liner into 'a.out'
    perlcc -c -e 'print q//'   # Creates a C file 'a.out.c'

    perlcc -I /foo hello       # extra headers for C
    perlcc -L /foo hello       # extra libraries for C
    perlcc --Wb=-Dsp           # extra perl compiler options
    perlcc -fno-delete-pkg     # extra perl compiler options
    perlcc --Wc=-fno-openmp    # extra C compiler options
    perlcc --Wl=-s             # extra C linker options

    perlcc -uIO::Socket        # force saving IO::Socket
    perlcc -UB                 # "unuse" B, compile without any B symbols

    perlcc -r hello            # compiles 'hello' into 'a.out', runs 'a.out'
    perlcc -r hello a b c      # compiles 'hello' into 'a.out', runs 'a.out'
                               # with arguments 'a b c'

    perlcc hello -log c.log    # compiles 'hello' into 'a.out', log into 'c.log'

    perlcc -h                  # help, only SYNOPSIS
    perlcc -v2 -h              # verbose help, also DESCRIPTION and OPTIONS
    perlcc --version           # prints internal perlcc and the B-C release version


perlcc creates standalone executables from Perl programs, using the code generators provided by the B module. At present, you may either create executable Perl bytecode, using the -B option, or generate and compile C files using the standard and 'optimised' C backends.

The code generated in this way is not guaranteed to work. The whole codegen suite (perlcc included) should be considered very experimental. Use for production purposes is strongly discouraged.


-LC library directories

Adds the given directories to the library search path when C code is passed to your C compiler. For multiple paths use multiple -L options.

-IC include directories

Adds the given directories to the include file search path when C code is passed to your C compiler; when using the Perl bytecode option, adds the given directories to Perl's include path. For multiple paths use multiple -I options.

-o output file name

Specifies the file name for the final compiled executable.

Without given output file name we use the base of the input file, or with -e a.out resp. a.exe and a randomized intermediate C filename. If the input file is an absolute path on a non-windows system use the basename.

-c C file name

Create C file only; do not compile and link to a standalone binary.

-e perl code

Compile a one-liner, much the same as perl -e '...'


Pass -c flag to the backend, prints all backend warnings to STDOUT and exits before generating and compiling code. Similar to perl -c.


"Keep source". Do not delete generated C code after compilation.


Use the Perl bytecode code generator.

--debug or -D

Shortcut for --Wb=-Dfull -S to enable all debug levels and also preserve source code, also view --Wb to enable some specific debugging options.


Use the 'optimised' C code generator B::CC. This is more experimental than everything else put together, and the code created is not guaranteed to compile in finite time and memory, or indeed, at all.


Pass the numeric optimisation option to the compiler backend. Shortcut for -Wb=-On.

This does not enforce B::CC.

-v 0-6

Set verbosity of output from 0 to max. 6.


Run the resulting compiled script after compiling it.

--log logfile

Log the output of compiling to a file rather than to stdout.

-f<option> or --f=<option>

Pass the options to the compiler backend, such as -fstash or -fno-delete-pkg.


Pass the options to the compiler backend, such as --Wb=-O2,-v


Pass comma-seperated options to cc.


Pass comma-seperated options to ld.

-T or -t

run the backend using perl -T or -t


Allow perl options to be passed to the executable first, like -D...

Adds -DALLOW_PERL_OPTIONS which omits -- from being added to the options handler.

-u package

Add package(s) to compiler and force linking to it.

-U package

Skip package(s). Do not compile and link the package and its sole dependencies.


Detect external packages automatically via B::Stash


Link to static libperl.a


Link to static XS if available. If the XS libs are only available as shared libs link to those ("prelink").

Systems without rpath (windows, cygwin) must be extend LD_LIBRARY_PATH/PATH at run-time. Together with -static, purely static modules and no run-time eval or require this will gain no external dependencies.


Link to shared libperl


Link shared XSUBs if the linker supports it. No DynaLoader needed. This will still require the shared XSUB libraries to be installed at the client, modification of @INC in the source is probably required. (Not yet implemented)

-m|--sharedlib [Modulename]

Create a module, resp. a shared library. Currently only enabled for Bytecode and CC. (not yet tested)


Tries be nice to Test:: modules, like preallocating the file handles 4 and 5, and munge the output of BEGIN.

  perlcc -r --testsuite t/harness

Benchmark the different phases c (B::* compilation), cc (cc compile + link), and r (runtime).


Do not spawn subprocesses for compilation, because broken shells might not be able to kill its children.

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