Make the encoding example optional

Makefile.am

@@ -104,14 +104,17 @@ if ARMV5E
 endif
 endif
 
+noinst_HEADERS = amrwbenc/inc/*.h amrwbenc/inc/*.tab common/include/*.h
+
+if EXAMPLE
 bin_PROGRAMS = amrwb-enc$(EXEEXT)
 
 amrwb_enc_LDADD = libvo-amrwbenc.la
 amrwb_enc_SOURCES = amrwb-enc.c wavreader.c
 
-noinst_HEADERS = wavreader.h
+noinst_HEADERS += wavreader.h
+endif
 
-noinst_HEADERS += amrwbenc/inc/*.h amrwbenc/inc/*.tab common/include/*.h
 
 EXTRA_DIST = amrwbenc/*.cpp amrwbenc/*.mk amrwbenc/SampleCode \
              amrwbenc/build amrwbenc/doc amrwbenc/*.txt \

configure.ac

@@ -22,10 +22,15 @@ AC_ARG_ENABLE([armv7neon],
             [AS_HELP_STRING([--enable-armv7neon],
                [enable ARMV7 neon assembler (default is no)])],
             [armv7neon=$enableval], [armv7neon=no])
+AC_ARG_ENABLE([example],
+            [AS_HELP_STRING([--enable-example],
+                [enable example encoding program (default is no)])],
+            [example=$enableval], [example=no])
 
 # Automake conditionals to set
 AM_CONDITIONAL(ARMV5E, test x$armv5e = xyes)
 AM_CONDITIONAL(ARMV7NEON, test x$armv7neon = xyes)
+AM_CONDITIONAL(EXAMPLE, test x$example = xyes)
 
 # Checks for programs.
 AM_PROG_AS