Use LLVM-style command line (instead of DMD-style) Note: For a backward compatible interface, use the new bin/ldmd script. It supports all old options while passing on anything it doesn't recognize. Some changes caused by this: * -debug and -version are now -d-debug and -d-version due to a conflict with standard LLVM options. * All "flag" options now allow an optional =true/=1/=false/=0 suffix. * Some "hidden debug switches" starting with "--" were renamed because LLVM doesn't care about the number of dashes, so they were conflicting with other options (such as -c). The new versions start with "-hidden-debug-" instead of "--" * --help works, but has a non-zero exit code. This breaks some Tango scripts which use it to test for compiler existence. See tango.patch. Some changes not (directly) caused by this; * (-enable/-disable)-FOO options are now available for pre- and postconditions. * -march is used instead of -m (like other LLVM programs), but -m is an alias for it. * -defaultlib, -debuglib, -d-debug and -d-version allow comma-separated values. The effect should be identical to specifying the same option multiple times. I decided against allowing these for some other options because paths might contain commas on some systems. * -fPIC is removed in favor of the standard LLVM option -relocation-model=pic Bug: * If -run is specified as the last argument in DFLAGS, no error is generated. (Not very serious IMHO)

--- a/gen/logger.cpp	Thu Feb 19 13:51:44 2009 +0100
+++ b/gen/logger.cpp	Wed Feb 25 17:34:51 2009 +0100
@@ -8,6 +8,7 @@
 
 #include "mars.h"
 
+#include "llvm/Support/CommandLine.h"
 #include "gen/logger.h"
 
 namespace Logger
@@ -15,7 +16,10 @@
     static std::string indent_str;
     static std::ofstream null_out("/dev/null");
 
-    static bool _enabled = false;
+    llvm::cl::opt<bool> _enabled("vv",
+        llvm::cl::desc("Very verbose"),
+        llvm::cl::ZeroOrMore);
+
     void indent()
     {
         if (_enabled) {