Fix -Xoverride-konan-properties for Apple strip

When building an optimised release dynamic framework we see a lot of local symbols in Mach-O. When calling `strip -x` this can be dramatically reduced whilst still having a usable artefact.

Current logic seems to keep symbols for DSYM extraction in debug light mode. But only strips hardcoded debug symbols (`strip -S`) afterwards.

Introduce new stripFlags for Apple compilation to allow optimization for release with DSYM builds

kotlin-native/konan/konan.properties

@@ -91,6 +91,7 @@ clangDebugFlags.macos_x64 = -O0
 linkerKonanFlags.macos_x64 = -lSystem -lc++ -lobjc -framework Foundation -sdk_version 10.15.6
 linkerOptimizationFlags.macos_x64 = -dead_strip
 linkerNoDebugFlags.macos_x64 = -S
+stripFlags.macos_x64 = -S
 linkerDynamicFlags.macos_x64 = -dylib
 
 osVersionMinFlagLd.macos_x64 = -macosx_version_min
@@ -127,6 +128,7 @@ clangDebugFlags.macos_arm64 = -O0 -mllvm -fast-isel=false -mllvm -global-isel=fa
 linkerKonanFlags.macos_arm64 = -lSystem -lc++ -lobjc -framework Foundation -sdk_version 11.0.1
 linkerOptimizationFlags.macos_arm64 = -dead_strip
 linkerNoDebugFlags.macos_arm64 = -S
+stripFlags.macos_arm64 = -S
 linkerDynamicFlags.macos_arm64 = -dylib
 
 osVersionMinFlagLd.macos_arm64 = -macosx_version_min
@@ -157,6 +159,7 @@ clangNooptFlags.ios_arm32 = -O1
 clangOptFlags.ios_arm32 = -O3
 clangDebugFlags.ios_arm32 = -O0
 linkerNoDebugFlags.ios_arm32 = -S
+stripFlags.ios_arm32 = -S
 linkerDynamicFlags.ios_arm32 = -dylib
 linkerKonanFlags.ios_arm32 = -lSystem -lc++ -lobjc -framework Foundation -sdk_version 14.0
 linkerOptimizationFlags.ios_arm32 = -dead_strip
@@ -192,6 +195,7 @@ clangOptFlags.ios_arm64 = -O3
 clangDebugFlags.ios_arm64 = -O0 -mllvm -fast-isel=false -mllvm -global-isel=false
 
 linkerNoDebugFlags.ios_arm64 = -S
+stripFlags.ios_arm64 = -S
 linkerDynamicFlags.ios_arm64 = -dylib
 linkerKonanFlags.ios_arm64 = -lSystem -lc++ -lobjc -framework Foundation -sdk_version 14.0
 linkerOptimizationFlags.ios_arm64 = -dead_strip
@@ -221,6 +225,7 @@ clangDebugFlags.ios_x64 = -O0
 linkerKonanFlags.ios_x64 = -lSystem -lc++ -lobjc -framework Foundation -sdk_version 14.0
 linkerOptimizationFlags.ios_x64 = -dead_strip
 linkerNoDebugFlags.ios_x64 = -S
+stripFlags.ios_x64 = -S
 linkerDynamicFlags.ios_x64 = -dylib
 osVersionMinFlagLd.ios_x64 = -ios_simulator_version_min
 osVersionMinFlagClang.ios_x64 = -mios-simulator-version-min
@@ -247,6 +252,7 @@ clangDebugFlags.tvos_x64 = -O0
 linkerKonanFlags.tvos_x64 = -lSystem -lc++ -lobjc -framework Foundation -sdk_version 14.0
 linkerOptimizationFlags.tvos_x64 = -dead_strip
 linkerNoDebugFlags.tvos_x64 = -S
+stripFlags.tvos_x64 = -S
 linkerDynamicFlags.tvos_x64 = -dylib
 osVersionMinFlagLd.tvos_x64 = -tvos_simulator_version_min
 osVersionMinFlagClang.tvos_x64 = -mtvos-simulator-version-min
@@ -271,6 +277,7 @@ clangOptFlags.tvos_arm64 = -O3
 clangDebugFlags.tvos_arm64 = -O0 -mllvm -fast-isel=false -mllvm -global-isel=false
 
 linkerNoDebugFlags.tvos_arm64 = -S
+stripFlags.tvos_arm64 = -S
 linkerDynamicFlags.tvos_arm64 = -dylib
 linkerKonanFlags.tvos_arm64 = -lSystem -lc++ -lobjc -framework Foundation -sdk_version 14.0
 linkerOptimizationFlags.tvos_arm64 = -dead_strip
@@ -299,6 +306,7 @@ clangDebugFlags.watchos_arm32 = -O0
 linkerKonanFlags.watchos_arm32 = -lSystem -lc++ -lobjc -framework Foundation -sdk_version 7.0
 linkerOptimizationFlags.watchos_arm32 = -dead_strip
 linkerNoDebugFlags.watchos_arm32 = -S
+stripFlags.watchos_arm32 = -S
 linkerDynamicFlags.watchos_arm32 = -dylib
 osVersionMinFlagLd.watchos_arm32 = -watchos_version_min
 osVersionMinFlagClang.watchos_arm32 = -mwatchos-version-min
@@ -328,6 +336,7 @@ clangDebugFlags.watchos_arm64 = -O0
 linkerKonanFlags.watchos_arm64 = -lSystem -lc++ -lobjc -framework Foundation -sdk_version 7.0
 linkerOptimizationFlags.watchos_arm64 = -dead_strip
 linkerNoDebugFlags.watchos_arm64 = -S
+stripFlags.watchos_arm64 = -S
 linkerDynamicFlags.watchos_arm64 = -dylib
 osVersionMinFlagLd.watchos_arm64 = -watchos_version_min
 osVersionMinFlagClang.watchos_arm64 = -mwatchos-version-min
@@ -360,6 +369,7 @@ clangDebugFlags.watchos_x86 = -O0
 linkerKonanFlags.watchos_x86 = -lSystem -lc++ -lobjc -framework Foundation -sdk_version 7.0
 linkerOptimizationFlags.watchos_x86 = -dead_strip
 linkerNoDebugFlags.watchos_x86 = -S
+stripFlags.watchos_x86 = -S
 linkerDynamicFlags.watchos_x86 = -dylib
 osVersionMinFlagLd.watchos_x86 = -watchos_simulator_version_min
 osVersionMinFlagClang.watchos_x86 = -mwatchos-simulator-version-min
@@ -386,6 +396,7 @@ clangDebugFlags.watchos_x64 = -O0
 linkerKonanFlags.watchos_x64 = -lSystem -lc++ -lobjc -framework Foundation -sdk_version 7.0
 linkerOptimizationFlags.watchos_x64 = -dead_strip
 linkerNoDebugFlags.watchos_x64 = -S
+stripFlags.watchos_x64 = -S
 linkerDynamicFlags.watchos_x64 = -dylib
 osVersionMinFlagLd.watchos_x64 = -watchos_simulator_version_min
 osVersionMinFlagClang.watchos_x64 = -mwatchos-simulator-version-min

kotlin-native/shared/src/main/kotlin/org/jetbrains/kotlin/konan/target/Configurables.kt

@@ -98,6 +98,7 @@ interface AppleConfigurables : Configurables, ClangFlags {
     val arch get() = targetString("arch")!!
     val osVersionMin get() = targetString("osVersionMin")!!
     val osVersionMinFlagLd get() = targetString("osVersionMinFlagLd")!!
+    val stripFlags get() = targetList("stripFlags")
     val additionalToolsDir get() = hostString("additionalToolsDir")
     val absoluteAdditionalToolsDir get() = absolute(additionalToolsDir)
 }

kotlin-native/shared/src/main/kotlin/org/jetbrains/kotlin/konan/target/Linker.kt

@@ -265,7 +265,7 @@ class MacOSBasedLinker(targetProperties: AppleConfigurables)
         if (debug) {
             result += dsymUtilCommand(executable, outputDsymBundle)
             if (optimize) {
-                result += Command(strip, "-S", executable)
+                result += Command(strip, *stripFlags.toTypedArray(), executable)
             }
         }