diff --git a/app.js b/app.js
index d05ca898..b3fa0a72 100755
--- a/app.js
+++ b/app.js
@@ -329,8 +329,6 @@ function findCompilers() {
             versionRe: props("versionRe"),
             compilerType: props("compilerType", ""),
             intelAsm: props("intelAsm", ""),
-            asmFlag: props("asmFlag", "-S"),
-            outputFlag: props("outputFlag", "-o"),
             needsMulti: !!props("needsMulti", true),
             supportsBinary: !!props("supportsBinary", true),
             postProcess: props("postProcess", "").split("|")
diff --git a/etc/config/c++.lud-mgodbolt01.properties b/etc/config/c++.lud-mgodbolt01.properties
index 4bc410a3..12302098 100644
--- a/etc/config/c++.lud-mgodbolt01.properties
+++ b/etc/config/c++.lud-mgodbolt01.properties
@@ -18,7 +18,6 @@ compiler.clang39.name=Clang 3.9
 group.windows.compilers=&cl19
 group.windows.compilerType=CL
 group.windows.needsMulti=false
-group.windows.asmFlag=/FAsc
 group.windows.versionFlag=/?
 group.windows.versionRe=^Microsoft \(R\) C/C\+\+.*$
 group.cl19.compilers=cl19_64:cl19_x86:cl19_arm
diff --git a/etc/config/d.amazon.properties b/etc/config/d.amazon.properties
index 4a960429..86ebd71b 100644
--- a/etc/config/d.amazon.properties
+++ b/etc/config/d.amazon.properties
@@ -12,9 +12,7 @@ compiler.gdc52.exe=/opt/gcc-explorer/gdc5.2.0/x86_64-pc-linux-gnu/bin/gdc
 compiler.gdc52.name=gdc 5.2.0
 
 group.ldc.compilers=ldc017:ldc100:ldc110
-group.ldc.asmFlag=-output-s
-group.ldc.outputFlag=-of
-group.ldc.intelAsm=-x86-asm-syntax=intel
+group.ldc.compilerType=ldc
 compiler.ldc017.exe=/opt/gcc-explorer/ldc0.17.2/ldc2-0.17.2-linux-x86_64/bin/ldc2
 compiler.ldc017.name=ldc 0.17.2
 compiler.ldc100.exe=/opt/gcc-explorer/ldc1.0.0/ldc2-1.0.0-linux-x86_64/bin/ldc2
diff --git a/lib/compile.js b/lib/compile.js
index 97c29986..d45de616 100644
--- a/lib/compile.js
+++ b/lib/compile.js
@@ -446,12 +446,23 @@ function compileRust(info, env) {
     compiler.optionsForFilter = function (filters, outputFilename) {
         var options = ['-g', '-o', this.filename(outputFilename)];
         // TODO: binary not supported(?)
-        if (filters.binary) options = options.concat('--emit', 'asm');
+        if (!filters.binary) options = options.concat('--emit', 'asm');
         options = options.concat(['--crate-type', 'staticlib']);
         return options;
     };
 }
 
+function compileLdc(info, env) {
+    var compiler = new Compile(info, env);
+    // TODO this needs testing!
+    compiler.optionsForFilter = function (filters, outputFilename) {
+        var options = ['-g', '-of', this.filename(outputFilename)];
+        if (filters.intel && !filters.binary) options.concat('-x86-asm-syntax=intel');
+        if (!filters.binary) options = options.concat('-output-s');
+        return options;
+    };
+}
+
 var compileFactories = {
     "": function (info, env) {
         var comp = new Compile(info, env);
@@ -459,7 +470,8 @@ var compileFactories = {
     },
     "CL": compileCl,
     "6g": compile6g,
-    "rust": compileRust
+    "rust": compileRust,
+    "ldc": compileLdc
 };
 
 function CompileHandler() {