Fixed some of the cmake buildsystem issues. CMake provides an ALSA
module for a long time now ...
---
diff -uprN nana.org/build/cmake/enable_audio.cmake nana/build/cmake/enable_audio.cmake
--- nana.org/build/cmake/enable_audio.cmake	2020-02-13 16:49:53.913064651 +0100
+++ nana/build/cmake/enable_audio.cmake	2020-02-13 16:50:04.823602262 +0100
@@ -4,12 +4,12 @@ option(NANA_CMAKE_ENABLE_AUDIO "Enable c
 if(NANA_CMAKE_ENABLE_AUDIO)
     target_compile_definitions(nana PUBLIC NANA_ENABLE_AUDIO)
     if(UNIX)
-        find_package(ASOUND) # ? https://github.com/hintjens/demidi/blob/master/Findasound.cmake
-        if(ASOUND_FOUND)
-            target_include_directories(nana PUBLIC ${ASOUND_INCLUDE_DIRS})
-            target_link_libraries(nana PUBLIC  ${ASOUND_LIBRARIES})
+        find_package(ALSA) # ? https://github.com/hintjens/demidi/blob/master/Findasound.cmake
+        if(ALSA_FOUND)
+            target_include_directories(nana PUBLIC ${ALSA_INCLUDE_DIRS})
+            target_link_libraries(nana PUBLIC  ${ALSA_LIBRARIES})
         else()
             message(FATAL_ERROR "libasound is not found")
         endif()
     endif()
-endif()
\ No newline at end of file
+endif()
diff -uprN nana.org/build/cmake/shared_libs.cmake nana/build/cmake/shared_libs.cmake
--- nana.org/build/cmake/shared_libs.cmake	2020-02-13 16:49:53.913064651 +0100
+++ nana/build/cmake/shared_libs.cmake	2020-02-13 17:07:49.469445929 +0100
@@ -37,10 +37,6 @@ if(BUILD_SHARED_LIBS)   # todo test
 endif()
 
 if(NANA_STATIC_STDLIB)
-    target_link_libraries(nana
-        PUBLIC
-            $<$<CXX_COMPILER_ID:GNU>:-static-libgcc -static-libstdc++>
-            $<$<CXX_COMPILER_ID:Clang>:-static-libgcc -static-libstdc++>
-            )
+    target_link_libraries(nana PUBLIC -static-libgcc -static-libstdc++)
 endif()