mirror of
https://github.com/torvalds/linux
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8a7eab2b54
Commit 56c176c9ca ("UAPI: strip the _UAPI prefix from header guards
during header installation") strips the _UAPI prefix from header guards,
but only if there's a single space between the cpp directive and the
label.
Make it more flexible and able to handle tabs and multiple white space
characters.
Signed-off-by: David Howells <dhowell@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
63 lines
1.9 KiB
Perl
63 lines
1.9 KiB
Perl
#!/usr/bin/perl -w
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#
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# headers_install prepare the listed header files for use in
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# user space and copy the files to their destination.
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#
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# Usage: headers_install.pl readdir installdir arch [files...]
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# installdir: dir to install the files to
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# arch: current architecture
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# arch is used to force a reinstallation when the arch
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# changes because kbuild then detect a command line change.
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# files: list of files to check
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#
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# Step in preparation for users space:
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# 1) Drop all use of compiler.h definitions
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# 2) Drop include of compiler.h
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# 3) Drop all sections defined out by __KERNEL__ (using unifdef)
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use strict;
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my ($installdir, $arch, @files) = @ARGV;
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my $unifdef = "scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__";
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foreach my $filename (@files) {
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my $file = $filename;
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$file =~ s!^.*/!!;
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my $tmpfile = "$installdir/$file.tmp";
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open(my $in, '<', $filename)
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or die "$filename: $!\n";
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open(my $out, '>', $tmpfile)
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or die "$tmpfile: $!\n";
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while (my $line = <$in>) {
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$line =~ s/([\s(])__user\s/$1/g;
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$line =~ s/([\s(])__force\s/$1/g;
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$line =~ s/([\s(])__iomem\s/$1/g;
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$line =~ s/\s__attribute_const__\s/ /g;
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$line =~ s/\s__attribute_const__$//g;
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$line =~ s/\b__packed\b/__attribute__((packed))/g;
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$line =~ s/^#include <linux\/compiler.h>//;
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$line =~ s/(^|\s)(inline)\b/$1__$2__/g;
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$line =~ s/(^|\s)(asm)\b(\s|[(]|$)/$1__$2__$3/g;
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$line =~ s/(^|\s|[(])(volatile)\b(\s|[(]|$)/$1__$2__$3/g;
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$line =~ s/#ifndef\s+_UAPI/#ifndef /;
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$line =~ s/#define\s+_UAPI/#define /;
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$line =~ s!#endif\s+/[*]\s*_UAPI!#endif /* !;
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printf {$out} "%s", $line;
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}
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close $out;
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close $in;
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system $unifdef . " $tmpfile > $installdir/$file";
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# unifdef will exit 0 on success, and will exit 1 when the
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# file was processed successfully but no changes were made,
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# so abort only when it's higher than that.
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my $e = $? >> 8;
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if ($e > 1) {
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die "$tmpfile: $!\n";
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}
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unlink $tmpfile;
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}
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exit 0;
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