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build-aux: header-ifdef: Handle #pragma once

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If we see it, skip all remaining header guard checks

Acked-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
This commit is contained in:
Cole Robinson 2019-04-03 17:45:02 -04:00
parent cc8ce8eeaf
commit ac41ffb8fa
1 changed files with 5 additions and 0 deletions
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5
build-aux/header-ifdef.pl
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@ -32,6 +32,7 @@ my $STATE_GUARD_START = 6;
my $STATE_GUARD_DEFINE = 7;
my $STATE_GUARD_END = 8;
my $STATE_EOF = 9;
my $STATE_PRAGMA = 10;
my $file = " ";
my $ret = 0;
@ -132,6 +133,8 @@ while (<>) {
} elsif ($state == $STATE_GUARD_START) {
if (/^$/) {
&mistake("$file: too many blank lines after copyright header");
} elsif(/#pragma once/) {
$state = $STATE_PRAGMA;
} elsif (/#ifndef $ifdef$/) {
$state = $STATE_GUARD_DEFINE;
} else {
@ -147,6 +150,8 @@ while (<>) {
if (m,#endif /\* $ifdef \*/$,) {
$state = $STATE_EOF;
}
} elsif ($state == $STATE_PRAGMA) {
next;
} elsif ($state == $STATE_EOF) {
die "$file: unexpected content after '#endif /* $ifdef */'";
} else {