[AC_CHECK_HEADER([speex/speex.h], , AC_MSG_FAILURE([Unable to find the libspeex headers (you may need to install the dev package). You may use --without-speex to compile without speex codec support.]))]
[AC_CHECK_HEADER([speex/speex_preprocess.h], , AC_MSG_FAILURE([Unable to find the libspeexdsp headers (you may need to install the libspeexdsp-dev package). You may use --without-speex to compile without speex codec support.]))]
[AC_CHECK_LIB([speex], [speex_decode_int],
[],
[AC_MSG_FAILURE(
[libspeex link test failed. You may use --without-speex to compile without speex codec support.])]
)
]
dnl More advanced check in case the libspeexdsp is not installed
dnl check in case the libspeexdsp is not installed
AC_CHECK_HEADER([speex/speex_preprocess.h], , AC_MSG_FAILURE([Unable to find the libspeexdsp headers (you may need to install the libspeexdsp-dev package) used for Noise Suppression and Automatic Gain Control.]))