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deduplicate_flags: keep paired flag+value tokens together (#1168)

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This commit is contained in:
Jerry Ma
2026-05-24 22:57:23 +08:00
committed by GitHub
parent ec3fd0f4b0 c666cd6cd0
commit 6cab47db67
1 changed files with 22 additions and 2 deletions
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24
src/globals/functions.php
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@@ -256,10 +256,30 @@ function clean_spaces(string $string): string
*/
function deduplicate_flags(string $flags): string
{
$tokens = preg_split('/\s+/', trim($flags));
// Flags that take their value as a separate token.
static $paired = [
'-Xclang', '-Xpreprocessor', '-Xlinker', '-Xassembler',
'-framework', '-arch', '-target',
'-include', '-imacros', '-isystem', '-isysroot', '-iquote', '-idirafter',
'-MT', '-MF', '-MQ',
];
$tokens = preg_split('/\s+/', trim($flags)) ?: [];
// Group paired flag+value into a single atom before dedup.
$atoms = [];
$n = count($tokens);
for ($i = 0; $i < $n; ++$i) {
if (in_array($tokens[$i], $paired, true) && $i + 1 < $n) {
$atoms[] = $tokens[$i] . ' ' . $tokens[$i + 1];
++$i;
} else {
$atoms[] = $tokens[$i];
}
}
// Reverse, unique, reverse back - keeps last occurrence of duplicates
$deduplicated = array_reverse(array_unique(array_reverse($tokens)));
$deduplicated = array_reverse(array_unique(array_reverse($atoms)));
return implode(' ', $deduplicated);
}