This removes all the logic that perl uses to locate an appropriate errno.h for the target. Instead we simple create a file that does #include "errno.h" and use that as the file to parse. This is needed when using an external toolchain since perl will search in ${STAGING_INCDIR} for errno.h (when using gcc) and that isn't where it's located - its wherever the external toolchain keeps it's headers. Index: perl-5.10.1/ext/Errno/Errno_pm.PL =================================================================== --- perl-5.10.1.orig/ext/Errno/Errno_pm.PL 2007-12-18 13:47:07.000000000 +0300 +++ perl-5.10.1/ext/Errno/Errno_pm.PL 2009-08-23 16:10:24.716303050 +0400 @@ -16,8 +16,18 @@ open OUT, ">Errno.pm" or die "Cannot open Errno.pm: $!"; select OUT; my $file; -my @files = get_files(); -if ($Config{gccversion} ne '' && $^O eq 'MSWin32') { +#my @files = get_files(); +my @files = ("errno.h"); + +if (1) { + open INCS, '>includes.c' or + die "Cannot open includes.c"; + print INCS qq[#include "errno.h"\n]; + close INCS; + process_file('includes.c'); + unlink 'includes.c'; +} +elsif ($Config{gccversion} ne '' && $^O eq 'MSWin32') { # MinGW complains "warning: #pragma system_header ignored outside include # file" if the header files are processed individually, so include them # all in .c file and process that instead. @@ -49,7 +59,7 @@ chomp($file = `cygpath -w "$file"`); } - return unless defined $file and -f $file; +# return unless defined $file and -f $file; # warn "Processing $file\n"; local *FH;