makefiles: Automatically add missing source variables in make_makefiles.

dlls/wineps.drv/Makefile.in

@@ -63,7 +63,7 @@ C_SRCS = \
 	type1afm.c \
 	type42.c
 
-RC_SRCS= \
+RC_SRCS = \
 	wps_Bg.rc \
 	wps_Cs.rc \
 	wps_Da.rc \

programs/iexplore/Makefile.in

@@ -8,4 +8,6 @@ C_SRCS = \
 
 RC_SRCS = iexplore.rc
 
+SVG_SRCS = iexplore.svg
+
 @MAKE_PROG_RULES@

tools/make_makefiles

@@ -241,6 +241,7 @@ sub replace_makefile_variable($$)
 {
     my ($file, $var) = @_;
     my $make = $makefiles{$file};
+    my $replaced = 0;
 
     return unless defined ${$make}{"=$var"};
 
@@ -252,7 +253,7 @@ sub replace_makefile_variable($$)
     open OLD_FILE, "$file.in" or die "cannot open $file.in";
     while (<OLD_FILE>)
     {
-        if (/^\s*($var\s+)=/)
+        if (/^\s*($var\s*)=/)
         {
             # try to preserve formatting
             my $prefix = $1;
@@ -270,8 +271,13 @@ sub replace_makefile_variable($$)
             {
                 print NEW_FILE "$prefix= @values\n";
             }
+            $replaced = 1;
             next;
         }
+        if (/^\@MAKE/ && !$replaced)
+        {
+            print NEW_FILE "$var = \\\n\t" . join(" \\\n\t", sort @values) . "\n";
+        }
         print NEW_FILE $_;
     }
     close OLD_FILE;