diff -ruN ldc-0.13.0.orig/dmd2/root/man.c ldc-0.13.0/dmd2/root/man.c
--- ldc-0.13.0.orig/dmd2/root/man.c	2014-02-10 12:08:36.000000000 +0000
+++ ldc-0.13.0/dmd2/root/man.c	2014-07-15 10:12:04.000000000 +0000
@@ -26,7 +26,7 @@
 
 #endif
 
-#if __linux__ || __FreeBSD__ || __OpenBSD__ || __sun
+#if __linux__ || __FreeBSD__ || __FreeBSD_kernel__ || __OpenBSD__ || __sun
 
 #include        <sys/types.h>
 #include        <sys/wait.h>
diff -ruN ldc-0.13.0.orig/dmd2/root/port.c ldc-0.13.0/dmd2/root/port.c
--- ldc-0.13.0.orig/dmd2/root/port.c	2014-05-10 13:47:06.000000000 +0000
+++ ldc-0.13.0/dmd2/root/port.c	2014-07-15 10:10:03.000000000 +0000
@@ -432,10 +432,10 @@
 
 #endif
 
-#if __linux__ || __APPLE__ || __FreeBSD__ || __OpenBSD__ || __HAIKU__
+#if __linux__ || __APPLE__ || __FreeBSD__ || __FreeBSD_kernel__ || __OpenBSD__ || __HAIKU__
 
 #include <math.h>
-#if __linux__
+#if __linux__ || __GLIBC__
 #include <bits/nan.h>
 #include <bits/mathdef.h>
 #endif
diff -ruN ldc-0.13.0.orig/driver/main.cpp ldc-0.13.0/driver/main.cpp
--- ldc-0.13.0.orig/driver/main.cpp	2014-06-23 16:27:55.000000000 +0000
+++ ldc-0.13.0/driver/main.cpp	2014-07-15 10:42:18.000000000 +0000
@@ -693,6 +693,11 @@
             VersionCondition::addPredefinedGlobalIdent("FreeBSD");
             VersionCondition::addPredefinedGlobalIdent("Posix");
             break;
+        case llvm::Triple::KFreeBSD:
+            VersionCondition::addPredefinedGlobalIdent("freebsd"); // For backwards compatibility.
+            VersionCondition::addPredefinedGlobalIdent("FreeBSD");
+            VersionCondition::addPredefinedGlobalIdent("Posix");
+            break;
         case llvm::Triple::Solaris:
             VersionCondition::addPredefinedGlobalIdent("solaris"); // For backwards compatibility.
             VersionCondition::addPredefinedGlobalIdent("Solaris");