Improve the ExportToHeader action

Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/AbstractFloatDataType.java

@@ -210,8 +210,8 @@ public String getDefaultLabelPrefix() {
 	@Override
 	public String getCTypeDeclaration(DataOrganization dataOrganization) {
 		// NOTE: There are a variety of naming conventions for fixed-length floats
-		// so we will just use our name and rely on user to edit to suit there needs.
-		return hasLanguageDependantLength() ? null : name;
+		// so we will just not provide a declaration and rely on the user to declare their own.
+		return null;
 	}
 
 	private static TreeMap<Integer, AbstractFloatDataType> floatTypes; // fixed-size float types

Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/BooleanDataType.java

@@ -75,8 +75,7 @@ public String getDescription() {
 	public Object getValue(MemBuffer buf, Settings settings, int length) {
 		try {
 			return buf.getByte(0) != 0;
-		}
-		catch (MemoryAccessException e) {
+		} catch (MemoryAccessException e) {
 			return null;
 		}
 	}
@@ -120,4 +119,13 @@ public AbstractIntegerDataType getOppositeSignednessDataType() {
 		return this;
 	}
 
+	private static final String EOL = System.getProperty("line.separator");
+
+	@Override
+	public String getCTypeDeclaration(DataOrganization dataOrganization) {
+		// In C++ and C23 and onwards bool is no longer a type that has to be declared first.
+		String declaration = super.getCTypeDeclaration(dataOrganization);
+		return "#if !defined(__cplusplus) && __STDC_VERSION__ < 202311L" + EOL + declaration + EOL + "#endif";
+	}
+
 }

Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/DataTypeWriter.java

@@ -452,6 +452,8 @@ private void writeCompositeBody(Composite composite, TaskMonitor monitor)
 		String compositeType = composite instanceof Structure ? "struct" : "union";
 
 		StringBuilder sb = new StringBuilder();
+		sb.append("#pragma pack(push, 1)").append(EOL);
+
 		sb.append(compositeType + " " + composite.getDisplayName() + " {");
 
 		String descrip = composite.getDescription();
@@ -466,7 +468,8 @@ private void writeCompositeBody(Composite composite, TaskMonitor monitor)
 		}
 
 		sb.append(annotator.getSuffix(composite, null));
-		sb.append("};");
+		sb.append("};").append(EOL);
+		sb.append("#pragma pack(pop)");
 
 		writer.write(sb.toString());
 		writer.write(EOL);

Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/FloatDataType.java

@@ -46,6 +46,11 @@ public DataType clone(DataTypeManager dtm) {
 		return new FloatDataType(dtm);
 	}
 
+	@Override
+	public String getCTypeDeclaration(DataOrganization dataOrganization) {
+		return null; // Standard C primitive
+	}
+
 	@Override
 	public boolean hasLanguageDependantLength() {
 		return true;