#!/usr/bin/perl -w # # headers_install prepare the listed header files for use in # user space and copy the files to their destination. # # Usage: headers_install.pl readdir installdir arch [files...] # readdir: dir to open files # installdir: dir to install the files # arch: current architecture # arch is used to force a reinstallation when the arch # changes because kbuild then detect a command line change. # files: list of files to check # # Step in preparation for users space: # 1) Drop all use of compiler.h definitions # 2) Drop include of compiler.h # 3) Drop all sections defined out by __KERNEL__ (using unifdef) use strict; my ($readdir, $installdir, $arch, @files) = @ARGV; my $unifdef = "scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__"; foreach my $file (@files) { my $tmpfile = "$installdir/$file.tmp"; open(my $in, '<', "$readdir/$file") or die "$readdir/$file: $!\n"; open(my $out, '>', $tmpfile) or die "$tmpfile: $!\n"; while (my $line = <$in>) { $line =~ s/([\s(])__user\s/$1/g; $line =~ s/([\s(])__force\s/$1/g; $line =~ s/([\s(])__iomem\s/$1/g; $line =~ s/\s__attribute_const__\s/ /g; $line =~ s/\s__attribute_const__$//g; $line =~ s/\b__packed\b/__attribute__((packed))/g; $line =~ s/^#include <linux\/compiler.h>//; $line =~ s/(^|\s)(inline)\b/$1__$2__/g; $line =~ s/(^|\s)(asm)\b(\s|[(]|$)/$1__$2__$3/g; $line =~ s/(^|\s|[(])(volatile)\b(\s|[(]|$)/$1__$2__$3/g; printf {$out} "%s", $line; } close $out; close $in; system $unifdef . " $tmpfile > $installdir/$file"; # unifdef will exit 0 on success, and will exit 1 when the # file was processed successfully but no changes were made, # so abort only when it's higher than that. my $e = $? >> 8; if ($e > 1) { die "$tmpfile: $!\n"; } unlink $tmpfile; } exit 0;