Updates the cmake build system

It's still has some work, but it successfully builds on
all 3 main platforms.  Some of the outstanding items
include:

   Install target testing (mostly important for Linux)
   CMakeList clean up and comments
   Debug and Release build verification
   Audit of compile/link options
   Need a Mac signed and notarized build
   (and probably more)

cmake-proxies/lib-widget-extra/CMakeLists.txt

@@ -0,0 +1,26 @@
+
+add_library( ${TARGET} STATIC )
+
+list( APPEND SOURCES
+   PRIVATE
+      ${TARGET_ROOT}/NonGuiThread.cpp
+)
+
+list( APPEND INCLUDES
+   PUBLIC
+      ${TARGET_ROOT}
+)
+
+list( APPEND LIBRARIES
+   PRIVATE
+      wxwidgets
+)
+
+organize_source( "${TARGET_ROOT}" "" "${SOURCES}" )
+target_sources( ${TARGET} PRIVATE ${SOURCES} )
+target_compile_definitions( ${TARGET} PRIVATE ${DEFINES} )
+target_compile_features( ${TARGET} PRIVATE ${FEATURES} )
+target_compile_options( ${TARGET} PRIVATE ${OPTIONS} )
+target_include_directories( ${TARGET} PRIVATE ${INCLUDES} )
+target_link_libraries( ${TARGET} PRIVATE ${LIBRARIES} )
+

cmake-proxies/lib-widget-extra/config.h.in

@@ -0,0 +1,96 @@
+/* libtwolame/config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Define if building universal (internal helper macro) */
+#cmakedefine AC_APPLE_UNIVERSAL_BUILD 1
+
+/* Define to 1 if you have the <assert.h> header file. */
+#cmakedefine HAVE_ASSERT_H 1
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#cmakedefine HAVE_DLFCN_H 1
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#cmakedefine HAVE_INTTYPES_H 1
+
+/* Define to 1 if you have the `m' library (-lm). */
+#cmakedefine HAVE_LIBM 1
+
+/* Define to 1 if you have the `mx' library (-lmx). */
+#cmakedefine HAVE_LIBMX 1
+
+/* Define to 1 if you have the <malloc.h> header file. */
+#cmakedefine HAVE_MALLOC_H 1
+
+/* Define to 1 if you have the <memory.h> header file. */
+#cmakedefine HAVE_MEMORY_H 1
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#cmakedefine HAVE_STDINT_H 1
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#cmakedefine HAVE_STDLIB_H 1
+
+/* Define to 1 if you have the <strings.h> header file. */
+#cmakedefine HAVE_STRINGS_H 1
+
+/* Define to 1 if you have the <string.h> header file. */
+#cmakedefine HAVE_STRING_H 1
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#cmakedefine HAVE_SYS_STAT_H 1
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#cmakedefine HAVE_SYS_TYPES_H 1
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#cmakedefine HAVE_UNISTD_H 1
+
+/* Define to the sub-directory in which libtool stores uninstalled libraries.
+   */
+#cmakedefine LT_OBJDIR "@LT_OBJDIR@"
+
+/* Name of package */
+#cmakedefine PACKAGE "@PACKAGE@"
+
+/* Define to the address where bug reports for this package should be sent. */
+#cmakedefine PACKAGE_BUGREPORT "@PACKAGE_BUGREPORT@"
+
+/* Define to the full name of this package. */
+#cmakedefine PACKAGE_NAME "@PACKAGE_NAME@"
+
+/* Define to the full name and version of this package. */
+#cmakedefine PACKAGE_STRING "@PACKAGE_STRING@"
+
+/* Define to the one symbol short name of this package. */
+#cmakedefine PACKAGE_TARNAME "@PACKAGE_TARNAME@"
+
+/* Define to the home page for this package. */
+#cmakedefine PACKAGE_URL "@PACKAGE_URL@"
+
+/* Define to the version of this package. */
+#cmakedefine PACKAGE_VERSION "@PACKAGE_VERSION@"
+
+/* The size of `float', as computed by sizeof. */
+#define SIZEOF_FLOAT @SIZEOF_FLOAT@ 
+
+/* The size of `short', as computed by sizeof. */
+#define SIZEOF_SHORT @SIZEOF_SHORT@
+
+/* Define to 1 if you have the ANSI C header files. */
+#cmakedefine STDC_HEADERS 1
+
+/* Version number of package */
+#cmakedefine VERSION "@VERSION@"
+
+/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
+   significant byte first (like Motorola and SPARC, unlike Intel). */
+#cmakedefine WORDS_BIGENDIAN @WORDS_BIGENDIAN@
+
+/* Define to empty if `const' does not conform to ANSI C. */
+#cmakedefine const @const@
+
+/* Define to `__inline__' or `__inline' if that's what the C compiler
+   calls it, or to nothing if 'inline' is not supported under any name.  */
+#ifndef __cplusplus
+#cmakedefine inline @inline@
+#endif