Misc tweaks and fixes

* Imagine: Increase minimum compiler requirements to GCC 14 or Clang 18
* Imagine: Use C++23 "Deducing this" feature added in above compiler versions to remove various duplicated member functions and simplify CRTP use
* Imagine: Fix display of single item TableView selected rectangle
* Imagine: Rename ctype utility functions to avoid possible collisions with macros in ctype.h
* Imagine: Fix Clang compilation on desktop linux and use libc++ by default
* Imagine: Various fixes for the OpenPandora handheld build
* Imagine: Update bundled libpng to 1.6.43 and drop support for old versions
* Imagine: Set -march=x86-64-v3 compile flag as default for Linux x86-64 build
* Imagine: Remove bundled Tremor library and use libvorbis for all ARMv7 builds
* C64.emu: Update gtk3_sym.vkm assets

2600.emu/metadata/conf.mk

@@ -5,4 +5,4 @@ metadata_pkgName = 2600Emu
 metadata_supportedFileExtensions += a26
 metadata_id = com.explusalpha.A2600Emu
 metadata_vendor = Robert Broglia
-pnd_metadata_description = Atari 2600 emulator using components from Stella 4.7.3
+pnd_metadata_description = Atari 2600 emulator using components from Stella

2600.emu/res/pandora/gpOverlay.png

@@ -0,0 +1 @@
+../overlays/gpOverlay.png

2600.emu/src/main/EmuMenuViews.cc

@@ -32,12 +32,11 @@ namespace EmuEx
 
 constexpr SystemLogger log{"2600.emu"};
 
-template <class T>
-using MainAppHelper = EmuAppHelper<T, MainApp>;
+using MainAppHelper = EmuAppHelperBase<MainApp>;
 
-class CustomAudioOptionView : public AudioOptionView, public MainAppHelper<CustomAudioOptionView>
+class CustomAudioOptionView : public AudioOptionView, public MainAppHelper
 {
-	using MainAppHelper<CustomAudioOptionView>::system;
+	using MainAppHelper::system;
 
 	TextMenuItem::SelectDelegate setResampleQualityDel()
 	{
@@ -71,9 +70,9 @@ class CustomAudioOptionView : public AudioOptionView, public MainAppHelper<Custo
 	}
 };
 
-class CustomVideoOptionView : public VideoOptionView, public MainAppHelper<CustomVideoOptionView>
+class CustomVideoOptionView : public VideoOptionView, public MainAppHelper
 {
-	using MainAppHelper<CustomVideoOptionView>::system;
+	using MainAppHelper::system;
 
 	TextMenuItem tvPhosphorBlendItem[4]
 	{
@@ -108,7 +107,7 @@ class CustomVideoOptionView : public VideoOptionView, public MainAppHelper<Custo
 	}
 };
 
-class ConsoleOptionView : public TableView, public MainAppHelper<ConsoleOptionView>
+class ConsoleOptionView : public TableView, public MainAppHelper
 {
 	TextMenuItem tvPhosphorItem[3]
 	{
@@ -320,7 +319,7 @@ class ConsoleOptionView : public TableView, public MainAppHelper<ConsoleOptionVi
 	{}
 };
 
-class VCSSwitchesView : public TableView, public MainAppHelper<VCSSwitchesView>
+class VCSSwitchesView : public TableView, public MainAppHelper
 {
 	BoolMenuItem diff1
 	{

C64.emu/build.mk

@@ -631,7 +631,12 @@ libtapeport_a_SOURCES := $(subst $(viceSrcPath)/,,$(filter %.c, $(wildcard $(vic
 
 libsamplerdrv_a_SOURCES := $(subst $(viceSrcPath)/,,$(filter %.c, $(wildcard $(viceSrcPath)/samplerdrv/*)))
 
+ifeq ($(SUBENV), pandora)
+libcCompatSrc = main/linuxCompat.c
+endif
+
 pluginNoTape_src = \
+$(libcCompatSrc) \
 main/pluginCommon.c \
 main/pluginCxxSupport.cc \
 $(libsounddrv_a_SOURCES) \

C64.emu/metadata/conf.mk

@@ -5,4 +5,4 @@ metadata_pkgName = C64Emu
 metadata_supportedFileExtensions += d64 g64 p64 x64 t64 tap crt
 metadata_id = com.explusalpha.C64Emu
 metadata_vendor = Robert Broglia
-pnd_metadata_description = Commodore 64 emulator using components from VICE 3.1
+pnd_metadata_description = Commodore 64 emulator using components from VICE

C64.emu/res/pandora/gpOverlay.png

@@ -0,0 +1 @@
+../overlays/gpOverlay.png