docs: build notes

CMakeLists.txt

@@ -8,6 +8,8 @@ set(CMAKE_CXX_STANDARD 20)
 # -DUSE_PTHREADS: for Thread.h
 set(CMAKE_CXX_FLAGS "-DNOMINMAX -DHAVE_UNISTD_H -DUSE_PTHREADS -DUSE_BQRESAMPLER -DHAVE_KISSFFT")
 
+# TODO: see Android.mk in librubberband and copy options from LOCAL_CFLAGS
+
 # disable libsndfile tests
 set(BUILD_TESTING FALSE)
 
@@ -16,8 +18,8 @@ include_directories(
     ./src/common
     ./src/ext/float_cast
     ./src/ext/kissfft
-    ./src/ext/pommier
+    #./src/ext/pommier
-    ./src/ext/speex
+    #./src/ext/speex
     ./src/faster
     ./src/finer
 )