m68k: no longer print recursion warnings

codeCore/src/prog8/code/core/ICompilationTarget.kt

@@ -87,6 +87,13 @@ interface ICompilationTarget: IStringEncoding, IMemSizer {
     val defaultLauncherType: CbmPrgLauncherType
     val supportsBankedCalls: Boolean
 
+    /**
+     * True when the code generator allocates subroutine locals and per-activation intermediate values
+     * in a stack frame instead of static memory, so a subroutine on a call-graph cycle can have more
+     * than one live activation. False means two live activations would share the same storage.
+     */
+    val supportsStackFrames: Boolean
+
     fun initializeMemoryAreas(compilerOptions: CompilationOptions)
     fun getFloatAsmBytes(num: Number): String
 

codeCore/src/prog8/code/target/Amiga1200Target.kt

@@ -12,6 +12,7 @@ class Amiga1200Target: ICompilationTarget,
 
     override val name = NAME
     override val supportsBankedCalls = true
+    override val supportsStackFrames = true
     override val defaultEncoding = Encoding.ISO
     override val libraryPath = null
     override val customLauncher = emptyList<String>()

codeCore/src/prog8/code/target/Amiga500Target.kt

@@ -12,6 +12,7 @@ class Amiga500Target: ICompilationTarget,
 
     override val name = NAME
     override val supportsBankedCalls = true
+    override val supportsStackFrames = true
     override val defaultEncoding = Encoding.ISO
     override val libraryPath = null
     override val customLauncher = emptyList<String>()

codeCore/src/prog8/code/target/C128Target.kt

@@ -12,6 +12,7 @@ class C128Target: ICompilationTarget,
 
     override val name = NAME
     override val supportsBankedCalls = true
+    override val supportsStackFrames = false
     override val defaultEncoding = Encoding.PETSCII
     override val libraryPath = null
     override val customLauncher = emptyList<String>()

codeCore/src/prog8/code/target/C64Target.kt

@@ -13,6 +13,7 @@ class C64Target: ICompilationTarget,
 
     override val name = NAME
     override val supportsBankedCalls = true
+    override val supportsStackFrames = false
     override val defaultEncoding = Encoding.PETSCII
     override val libraryPath = null
     override val customLauncher = emptyList<String>()

codeCore/src/prog8/code/target/ConfigFileTarget.kt

@@ -19,6 +19,7 @@ class ConfigFileTarget(
     override val supportsBankedCalls: Boolean,
     override val defaultEncoding: Encoding,
     override val cpu: CpuType,
+    override val supportsStackFrames: Boolean,
     override val PROGRAM_LOAD_ADDRESS: UInt,
     override val PROGRAM_MEMTOP_ADDRESS: UInt,
     override val BSSHIGHRAM_START: UInt,
@@ -144,6 +145,7 @@ class ConfigFileTarget(
                 props.getProperty("supports_banked_calls", "false").toBoolean(),
                 Encoding.entries.first { it.prefix==props.getString("encoding") },
                 cpuType,
+                props.getProperty("supports_stack_frames", cpuType.is68k.toString()).toBoolean(),
                 props.getInteger("load_address"),
                 props.getInteger("memtop"),
                 props.getInteger("bss_highram_start"),

codeCore/src/prog8/code/target/Cx16Target.kt

@@ -12,6 +12,7 @@ class Cx16Target: ICompilationTarget,
 
     override val name = NAME
     override val supportsBankedCalls = true
+    override val supportsStackFrames = false
     override val defaultEncoding = Encoding.PETSCII
     override val libraryPath = null
     override val customLauncher = emptyList<String>()

codeCore/src/prog8/code/target/PETTarget.kt

@@ -12,6 +12,7 @@ class PETTarget: ICompilationTarget,
 
     override val name = NAME
     override val supportsBankedCalls = false
+    override val supportsStackFrames = false
     override val defaultEncoding = Encoding.PETSCII
     override val libraryPath = null
     override val customLauncher = emptyList<String>()

codeCore/src/prog8/code/target/Qemu68kTarget.kt

@@ -16,6 +16,7 @@ class Qemu68kTarget: ICompilationTarget,
 
     override val name = NAME
     override val supportsBankedCalls = false
+    override val supportsStackFrames = true
     override val defaultEncoding = Encoding.ISO
     override val libraryPath = null
     override val customLauncher = emptyList<String>()

codeCore/src/prog8/code/target/VMTarget.kt

@@ -12,6 +12,7 @@ class VMTarget: ICompilationTarget,
 
     override val name = NAME
     override val supportsBankedCalls = false
+    override val supportsStackFrames = false
     override val defaultEncoding = Encoding.ISO
     override val libraryPath = null
     override val customLauncher = emptyList<String>()