Use /o in regexps where possible.

/o is a bit faster and works fine as our parsing regexps never change.

diff --git a/bin/blhc b/bin/blhc
index f4a242ce17fb3e29717031b7692dc7719b510af7..5443eef5a4226db9e3c64a315d602b0eb470131f 100755 (executable)
--- a/bin/blhc
+++ b/bin/blhc
@@ -311,7 +311,7 @@ sub is_non_verbose_build {
         $file =~ m{/([a-zA-Z0-9._-]+)$};
         $file = $1;
 
-        if ($next_line =~ /\Q$file\E/ and $next_line =~ /$cc_regex/) {
+        if ($next_line =~ /\Q$file\E/ and $next_line =~ /$cc_regex/o) {
             # We still have to skip the current line as it doesn't contain any
             # compiler commands.
             ${$skip_ref} = 1;
@@ -450,7 +450,7 @@ while (my $line = <>) {
     }
 
     # Ignore compiler warnings for now.
-    next if $line =~ /$warning_regex/;
+    next if $line =~ /$warning_regex/o;
 
     # Remove all ANSI color sequences which are sometimes used in non-verbose
     # builds.
@@ -501,7 +501,7 @@ while (my $line = <>) {
             }
 
             # Ignore lines with no compiler commands.
-            next if $line !~ /\b$cc_regex(?:\s|\\)/ and not $non_verbose;
+            next if $line !~ /\b$cc_regex(?:\s|\\)/o and not $non_verbose;
 
             # Ignore false positives.
             #
@@ -512,8 +512,8 @@ while (my $line = <>) {
                                (?:C|c)ompiler[\s.]*:?\s+
                                $cc_regex
                                (?:\s-std=[a-z0-9:+]+)?\s*$
-                             /x
-                    or $line =~ /^\s*(?:- )?(?:HOST_)?(?:CC|CXX)\s*=\s*$cc_regex\s*$/
+                             /xo
+                    or $line =~ /^\s*(?:- )?(?:HOST_)?(?:CC|CXX)\s*=\s*$cc_regex\s*$/o
                     or $line =~ /^\s*-- Check for working (?:C|CXX) compiler: /
                     or $line =~ /^\s*(?:echo )?Using [A-Z_]+\s*=\s*/;
             # `make` output.
@@ -596,7 +596,7 @@ for (my $i = 0; $i < scalar @input; $i++) {
 
     # Remove everything until and including the compiler command. Makes checks
     # easier and faster.
-    $line =~ s/^.*?$cc_regex//;
+    $line =~ s/^.*?$cc_regex//o;
 
     # Skip unnecessary tests when only preprocessing.
     my $flag_preprocess = 0;
@@ -616,7 +616,7 @@ for (my $i = 0; $i < scalar @input; $i++) {
     }
 
     # Get all file extensions on this line.
-    my @extensions = $line =~ /$file_extension_regex/g;
+    my @extensions = $line =~ /$file_extension_regex/go;
     # Ignore all unknown extensions to speedup the search below.
     @extensions = grep { exists $extension{$_} } @extensions;