/ 
ExtUtils-CppGuess-0.27
River stage three • 37 direct dependents • 109 total dependents
/ ExtUtils::CppGuess

NAME

ExtUtils::CppGuess - guess C++ compiler and flags

SYNOPSIS

With Extutils::MakeMaker:

use ExtUtils::CppGuess;

my $guess = ExtUtils::CppGuess->new;

WriteMakefile
  ( # MakeMaker args,
    $guess->makemaker_options,
    );

With Module::Build:

my $guess = ExtUtils::CppGuess->new;

my $build = Module::Build->new
  ( # Module::Build arguments
    $guess->module_build_options,
    );
$build->create_build_script;

DESCRIPTION

ExtUtils::CppGuess attempts to guess the system's C++ compiler that is compatible with the C compiler that your perl was built with.

It can generate the necessary options to the Module::Build constructor or to ExtUtils::MakeMaker's WriteMakefile function.

ENVIRONMENT

As of 0.24, the environment variable CXX defines the obvious value, and will be used instead of any detection. Supplied arguments to "new" will still win.

METHODS

new

Creates a new ExtUtils::CppGuess object. Takes the path to the C compiler as the cc argument, but falls back to the value of $Config{cc}, which should be what you want anyway.

You can specify extra_compiler_flags and extra_linker_flags (as strings) which will be merged in with the auto-detected ones.

module_build_options

Returns the correct options to the constructor of Module::Build. These are:

extra_compiler_flags
extra_linker_flags
config => { cc => ... }, # as of 0.15

Please note the above may have problems on Perl <= 5.8 with ExtUtils::CBuilder <= 0.280230 due to a Perl RE issue.

makemaker_options

Returns the correct options to the WriteMakefile function of ExtUtils::MakeMaker. These are:

CCFLAGS
dynamic_lib => { OTHERLDFLAGS => ... }
CC # as of 0.15

If you specify the extra compiler or linker flags in the constructor, they'll be merged into CCFLAGS or OTHERLDFLAGS respectively.

is_gcc

Returns true if the detected compiler is in the gcc family.

is_msvc

Returns true if the detected compiler is in the MS VC family.

is_clang

Returns true if the detected compiler is in the Clang family.

is_sunstudio

Returns true if the detected compiler is in the Sun Studio family.

add_extra_compiler_flags

Takes a string as argument that is added to the string of extra compiler flags.

add_extra_linker_flags

Takes a string as argument that is added to the string of extra linker flags.

compiler_command

Returns the string that can be passed to system to execute the compiler. Will include the flags returned as the Module::Build extra_compiler_flags.

Added in 0.13.

linker_flags

The same as returned as the Module::Build extra_linker_flags.

Added in 0.13.

iostream_fname

Returns the filename to #include to get iostream capability.

This can be used a bit creatively to be portable in one's XS files, as the tests for this module need to be:

# in Makefile.PL:
$guess->add_extra_compiler_flags(
  '-DINCLUDE_DOT=' .
  ($guess->iostream_fname =~ /\./ ? 1 : 0)
);

// in your .xs file:
#if INCLUDE_DOT
#include <string.h>
#else
#include <string>
#endif

Added in 0.15.

cpp_flavor_defs

Returns the text for a header that #defines __INLINE_CPP_STANDARD_HEADERS and __INLINE_CPP_NAMESPACE_STD if the standard headers and namespace are available. This is determined by trying to compile C++ with #define <iostream> - if it succeeds, the symbols will be defined, else commented.

Added in 0.15.

cpp_standard_flag

$guess->cpp_standard_flag( $standard_name )

Given a string $standard_name that is currently one of

  • C++98

  • C++11

  • C++14

  • C++17

  • C++20

  • C++23

returns a string with a flag that can be used to tell the compiler to support that version of the C++ standard or dies if version is not supported.

Added in version v0.22.

AUTHOR

Mattia Barbon <mbarbon@cpan.org>

Steffen Mueller <smueller@cpan.org>

Tobias Leich <froggs@cpan.org>

COPYRIGHT AND LICENSE

Copyright 2010, 2011 by Mattia Barbon.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.