X-Git-Url: https://ruderich.org/simon/gitweb/?p=blhc%2Fblhc.git;a=blobdiff_plain;f=bin%2Fblhc;h=91a5f4943c29076d61bde0904dffc7aa8d38a74a;hp=0cc2e6a21f5a2f37d26ec1af2cb72c593bd31df0;hb=53e64de60f08fcb752b1f3ccb41c9e8555be8866;hpb=700aa8fd9844c0368e0785da527ca472f6ed2ea9

diff --git a/bin/blhc b/bin/blhc
index 0cc2e6a..91a5f49 100755
--- a/bin/blhc
+++ b/bin/blhc
@@ -129,14 +129,8 @@ my %extensions_compile_cpp = map { $_ => 1 } (
 );
 my %extension = map { $_ => 1 } (
     @source_no_preprocess,
-    @source_no_preprocess_compile,
-    @source_no_preprocess_compile_cpp,
-    @source_no_preprocess_no_compile,
     @header_preprocess,
     @source_preprocess,
-    @source_preprocess_compile,
-    @source_preprocess_compile_cpp,
-    @source_preprocess_no_compile,
 );
 
 # Regexp to match file extensions.
@@ -737,6 +731,7 @@ FILE: foreach my $file (@ARGV) {
         # Skip unnecessary tests when only preprocessing.
         my $flag_preprocess = 0;
 
+        my $dependency = 0;
         my $preprocess = 0;
         my $compile    = 0;
         my $link       = 0;
@@ -746,11 +741,25 @@ FILE: foreach my $file (@ARGV) {
             $preprocess      = 1;
             $flag_preprocess = 1 if $1 eq '-E';
             $compile         = 1 if $1 eq '-S' or $1 eq '-c';
+        # Dependency generation for Makefiles. The other flags (-MF -MG -MP
+        # -MT -MQ) are always used with -M/-MM.
+        } elsif ($line =~ /\s(?:-M|-MM)\b/) {
+            $dependency = 1;
         # Otherwise assume we are linking.
         } else {
             $link = 1;
         }
 
+        # -MD/-MMD also cause dependency generation, but they don't imply -E!
+        if ($line =~ /\s(?:-MD|-MMD)\b/) {
+            $dependency      = 0;
+            $flag_preprocess = 0;
+        }
+
+        # Dependency generation for Makefiles, no preprocessing or other flags
+        # needed.
+        next if $dependency;
+
         # Get all file extensions on this line.
         my @extensions = $line =~ /$file_extension_regex/go;
         # Ignore all unknown extensions to speedup the search below.