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script/checkpatch.pl: warn about deprecated use of EXTRA_{A,C,CPP,LD}FLAGS 

Usage of these flags has been deprecated for nearly 4 years by:

    commit f77bf01425
    Author: Sam Ravnborg <sam@neptun.(none)>
    Date:   Mon Oct 15 22:25:06 2007 +0200

        kbuild: introduce ccflags-y, asflags-y and ldflags-y

Moreover, these flags (at least EXTRA_CFLAGS) have been documented for command
line use. By default, gmake(1) do not override command line setting, so this is
likely to result in build failure or unexpected behavior.

Warn about their introduction in Makefile or Kbuild files.

Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
Arnaud Lacombe 2011-08-15 01:07:14 -04:00 committed by Michal Marek
parent 9c65426ad2
commit c68e58783f
1 changed files with 14 additions and 0 deletions
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14
scripts/checkpatch.pl
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@ -1661,6 +1661,20 @@ sub process {
#print "is_end<$is_end> length<$length>\n";
}
if (($realfile =~ /Makefile.*/ || $realfile =~ /Kbuild.*/) &&
($line =~ /\+(EXTRA_[A-Z]+FLAGS).*/)) {
my $flag = $1;
my $replacement = {
'EXTRA_AFLAGS' => 'asflags-y',
'EXTRA_CFLAGS' => 'ccflags-y',
'EXTRA_CPPFLAGS' => 'cppflags-y',
'EXTRA_LDFLAGS' => 'ldflags-y',
};
WARN("DEPRECATED_VARIABLE",
"Use of $flag is deprecated, please use \`$replacement->{$flag} instead.\n" . $herecurr) if ($replacement->{$flag});
}
# check we are in a valid source file if not then ignore this hunk
next if ($realfile !~ /\.(h|c|s|S|pl|sh)$/);