X-Git-Url: https://ruderich.org/simon/gitweb/?p=blhc%2Fblhc.git;a=blobdiff_plain;f=bin%2Fblhc;h=c7457d2c79c1f4780741d60e5cc25725794fc2c4;hp=dc71cc1c940d1130660dd9574ba27aa7c72e6bb1;hb=19728cda633b5ab8e207a95bb22c5b526bd239c4;hpb=6bd8ae07ae91c53c36d219975bc3296b7af81045

diff --git a/bin/blhc b/bin/blhc
index dc71cc1..c7457d2 100755
--- a/bin/blhc
+++ b/bin/blhc
@@ -176,7 +176,8 @@ my $file_extension_regex = qr/
                     # terminated with "\n".
     /x;
 
-# Expected (hardening) flags. All flags are used as regexps.
+# Expected (hardening) flags. All flags are used as regexps (and compiled to
+# real regexps below for better execution speed).
 my @def_cflags = (
     '-g',
     '-O(?:2|3)',
@@ -475,6 +476,7 @@ sub is_non_verbose_build {
     return 1;
 }
 
+# Remove @flags from $flag_refs_ref, and $flag_renames_ref.
 sub remove_flags {
     my ($flag_refs_ref, $flag_renames_ref, @flags) = @_;
 
@@ -492,35 +494,37 @@ sub remove_flags {
     return;
 }
 
+# Modifies $flag_renames_ref hash.
 sub compile_flag_regexp {
     my ($flag_renames_ref, @flags) = @_;
 
     my @result = ();
     foreach my $flag (@flags) {
+        # Compile flag regexp for faster execution.
+        my $regex = qr/\s$flag(?:\s|\\)/;
+
         # Store flag name in replacement string for correct flags in messages
         # with qr//ed flag regexps.
-        $flag_renames_ref->{qr/\s$flag(?:\s|\\)/}
+        $flag_renames_ref->{$regex}
             = (exists $flag_renames_ref->{$flag})
                 ? $flag_renames_ref->{$flag}
                 : $flag;
 
-        # Compile flag regexp for faster execution.
-        push @result, qr/\s$flag(?:\s|\\)/;
+        push @result, $regex;
     }
     return @result;
 }
 
+# Does any extension in @extensions exist in %{$extensions_ref}?
 sub extension_found {
     my ($extensions_ref, @extensions) = @_;
 
-    my $found = 0;
     foreach my $extension (@extensions) {
         if (exists $extensions_ref->{$extension}) {
-            $found = 1;
-            last;
+            return 1;
         }
     }
-    return $found;
+    return 0;
 }
 
 
@@ -1023,7 +1027,8 @@ LINE:
             }
             next;
         }
-        # Even if it's a verbose build, we might have to skip this line.
+        # Even if it's a verbose build, we might have to skip this line (see
+        # is_non_verbose_build()).
         next if $skip;
 
         # Remove everything until and including the compiler command. Makes