diff --git a/core/src/main/java/org/lflang/generator/c/CCmakeGenerator.java b/core/src/main/java/org/lflang/generator/c/CCmakeGenerator.java
index 2cf6f58239..c421c3e603 100644
--- a/core/src/main/java/org/lflang/generator/c/CCmakeGenerator.java
+++ b/core/src/main/java/org/lflang/generator/c/CCmakeGenerator.java
@@ -225,7 +225,14 @@ CodeBuilder generateCMakeCode(
           cMakeCode.pr("set(FP_FLASH_DEVICE " + selectedFlashDevice.value() + ")");
           cMakeCode.newLine();
         } // No FP_FLASH_DEVICE will automatically become /dev/ttyUSB0
-
+        break;
+      case PATMOS:
+        cMakeCode.newLine();
+        cMakeCode.pr("# Include toolchain file and set project");
+        cMakeCode.pr("find_program(CLANG_EXECUTABLE NAMES patmos-clang clang DOC \"Path to the clang front-end.\")");
+        cMakeCode.pr("set(CMAKE_C_COMPILER ${CLANG_EXECUTABLE})");
+        cMakeCode.pr("project(" + executableName + " LANGUAGES C)");
+        cMakeCode.newLine();
         break;
       default:
         cMakeCode.pr("project(" + executableName + " LANGUAGES C)");
@@ -328,6 +335,13 @@ CodeBuilder generateCMakeCode(
                 executableName,
                 Stream.concat(additionalSources.stream(), sources.stream())));
         break;
+      case PATMOS:
+        cMakeCode.pr(
+            setUpMainTargetPatmos(
+                hasMain,
+                executableName,
+                Stream.concat(additionalSources.stream(), sources.stream())));
+        break;
       default:
         cMakeCode.pr(
             setUpMainTarget.getCmakeCode(
@@ -616,4 +630,31 @@ private static String setUpMainTargetFlexPRET(
 
     return code.toString();
   }
+
+  private static String setUpMainTargetPatmos(
+      boolean hasMain, String executableName, Stream<String> cSources) {
+    var code = new CodeBuilder();
+    code.pr("add_subdirectory(core)");
+    code.newLine();
+
+    code.pr("set(LF_MAIN_TARGET " + executableName + ")");
+    code.newLine();
+
+    if (hasMain) {
+      code.pr("# Declare a new executable target and list all its sources");
+      code.pr("add_executable(");
+    } else {
+      code.pr("# Declare a new library target and list all its sources");
+      code.pr("add_library(");
+    }
+    code.indent();
+    code.pr("${LF_MAIN_TARGET}");
+
+    cSources.forEach(code::pr);
+    code.unindent();
+    code.pr(")");
+    code.newLine();
+
+    return code.toString();
+  }
 }
diff --git a/core/src/main/java/org/lflang/generator/python/PythonReactorGenerator.java b/core/src/main/java/org/lflang/generator/python/PythonReactorGenerator.java
index 10c7e400df..99dbae7349 100644
--- a/core/src/main/java/org/lflang/generator/python/PythonReactorGenerator.java
+++ b/core/src/main/java/org/lflang/generator/python/PythonReactorGenerator.java
@@ -46,7 +46,8 @@ public static String generatePythonClass(
       pythonClasses.pr(generatePythonClassHeader(className));
       // Generate preamble code
       pythonClasses.indent();
-      pythonClasses.pr(PythonPreambleGenerator.generatePythonPreambles(reactor.getPreambles()));
+      pythonClasses.pr(
+          PythonPreambleGenerator.generatePythonPreambles(ASTUtils.allPreambles(reactor)));
       // Handle runtime initializations
       pythonClasses.pr(generatePythonConstructor(decl, types));
       pythonClasses.pr(PythonParameterGenerator.generatePythonGetters(decl));
diff --git a/core/src/main/java/org/lflang/target/property/type/PlatformType.java b/core/src/main/java/org/lflang/target/property/type/PlatformType.java
index f861753bf8..29f4fc9937 100644
--- a/core/src/main/java/org/lflang/target/property/type/PlatformType.java
+++ b/core/src/main/java/org/lflang/target/property/type/PlatformType.java
@@ -19,6 +19,7 @@ public enum Platform {
     MAC("Darwin", true),
     ZEPHYR("Zephyr", true),
     FLEXPRET("FlexPRET", true),
+    PATMOS("Patmos", false),
     WINDOWS("Windows", true);
 
     final String cMakeName;
diff --git a/core/src/main/resources/lib/c/reactor-c b/core/src/main/resources/lib/c/reactor-c
index 76ec485017..3d15df1f4a 160000
--- a/core/src/main/resources/lib/c/reactor-c
+++ b/core/src/main/resources/lib/c/reactor-c
@@ -1 +1 @@
-Subproject commit 76ec485017ae682a7f00aa9bc5609410c638c703
+Subproject commit 3d15df1f4a08c0ccb9ce62038873ee324d6a1c29
diff --git a/core/src/main/resources/lib/cpp/reactor-cpp b/core/src/main/resources/lib/cpp/reactor-cpp
index dfdac2c19e..65dff1fd22 160000
--- a/core/src/main/resources/lib/cpp/reactor-cpp
+++ b/core/src/main/resources/lib/cpp/reactor-cpp
@@ -1 +1 @@
-Subproject commit dfdac2c19e8d111cf4741c8bf8f304678a59d025
+Subproject commit 65dff1fd22d80305473acaf34a7e5209521b5ec0
diff --git a/test/C/src/PreambleInherited.lf b/test/C/src/PreambleInherited.lf
index 771185bdbc..2a2240a606 100644
--- a/test/C/src/PreambleInherited.lf
+++ b/test/C/src/PreambleInherited.lf
@@ -12,6 +12,9 @@ reactor A {
 }
 
 reactor B extends A {
+  reaction(startup) {=
+    printf("FOO 2: %d\n", FOO);
+  =}
 }
 
 main reactor {
diff --git a/test/C/src/patmos/HelloPatmos.lf b/test/C/src/patmos/HelloPatmos.lf
new file mode 100644
index 0000000000..8f289c980a
--- /dev/null
+++ b/test/C/src/patmos/HelloPatmos.lf
@@ -0,0 +1,12 @@
+target C {
+    platform: "Patmos",
+    single-threaded: true,
+    build-type: Debug, 
+  }
+  
+  main reactor {
+    reaction(startup) {=
+      printf("Hello World!\n");
+    =}
+  }
+  
\ No newline at end of file
diff --git a/test/Python/src/PreambleInherited.lf b/test/Python/src/PreambleInherited.lf
new file mode 100644
index 0000000000..3c27e03b52
--- /dev/null
+++ b/test/Python/src/PreambleInherited.lf
@@ -0,0 +1,18 @@
+target Python
+
+reactor Base {
+  preamble {=
+    def initiation(self):
+      print("Hello World\n")
+  =}
+}
+
+reactor Extended extends Base {
+  reaction(startup) {=
+    self.initiation()
+  =}
+}
+
+main reactor {
+  e = new Extended()
+}