Strip (basic) environment variables before compiler detection

[blhc/blhc.git] / bin / blhc

diff --git a/bin/blhc b/bin/blhc
index 2f8da5f2c4efdda473a2e3d414f98e65f3d796c8..0c9360b360788163294b89e94b9832091c05b98c 100755 (executable)
--- a/bin/blhc
+++ b/bin/blhc
@@ -1022,9 +1022,29 @@ foreach my $file (@ARGV) {
                 $complete_line = undef;
             }
 
+            my $noenv = $line;
+            # Strip (basic) environment variables for compiler detection. This
+            # prevents false positives when environment variables contain
+            # compiler binaries. Nested quotes, command substitution, etc. is
+            # not supported.
+            $noenv =~ s/^
+                \s*
+                (?:
+                    [a-zA-Z_]+          # environment variable name
+                    =
+                    (?:
+                        [^\s"'\$`\\]+   # non-quoted string
+                        |
+                        '[^"'\$`\\]*'   # single-quoted string
+                        |
+                        "[^"'\$`\\]*"   # double-quoted string
+                    )
+                    \s+
+                )*
+            //x;
             # Ignore lines with no compiler commands.
             next if not $non_verbose
-                    and not $line =~ /$cc_regex_normal/o;
+                    and not $noenv =~ /$cc_regex_normal/o;
             # Ignore lines with no filenames with extensions. May miss some
             # non-verbose builds (e.g. "gcc -o test" [sic!]), but shouldn't be
             # a problem as the log will most likely contain other non-verbose