# Build OpenSSL-1.1.1f on Windows
1. Install ActivePerl then edit file
`"Perl64\lib\ActivePerl\Config.pm"` => this path is for ActivePerl 5.2.6
Around line 400,

    # Prevent calling Win32::Console::DESTROY on a STDOUT handle
    my $console;
    sub _warn {
        # my($msg) = @_;
        # unless (-t STDOUT) {
	    # print "\n$msg\n";
	    # return;
        # }
        # require Win32::Console;
        # unless ($console) {
	    # $console = Win32::Console->new(Win32::Console::STD_OUTPUT_HANDLE());
        # }
        # my($col,undef) = $console->Size;
        # print "\n";
        # my $attr = $console->Attr;
        # $console->Attr($Win32::Console::FG_RED | $Win32::Console::BG_WHITE);
        # for (split(/\n/, "$msg")) {
	    # $_ .= " " while length() < $col-1;
	    # print "$_\n";
        # }
        # $console->Attr($attr);
        # print "\n";
    }

2. Download or clone OpenSSL source code
3. Configuration
Open Visual Studio command prompt and change working folder to OpenSSL source code folder.
`cd OpenSSL-1.1.1f\`
Set configuration
- for x86
`perl Configure VC-WIN32 no-asm --prefix=C:\OpenSSL-Win32`
- for x64
`perl Configure VC-WIN64A no-asm --prefix=C:\OpenSSL-Win64`
4. Build and Install
`nmake`
`nmake install`

###### tags: `OpenSSL`