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

       Mattia Barbon <mbarbon@cpan.org>

       Steffen Mueller <smueller@cpan.org>

       Tobias Leich <froggs@cpan.org>

       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.

perl v5.40.1                                       2025-04-13                            ExtUtils::CppGuess(3pm)

       "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.

       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.

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 "#define"s "__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.

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

       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;