dnl Process this file with autoconf to produce a configure script.
AC_INIT(dna.c)

CPPFLAGS=-D_GNU_SOURCE

dnl Set $host_os, which is needed by javac detection.
AC_CANONICAL_SYSTEM

dnl Init pkg-config
PKG_PROG_PKG_CONFIG()

dnl VoIP test app
AC_ARG_ENABLE(voiptest,
AS_HELP_STRING([--enable-voiptest], [Require VoIP test program (default: only build if dependencies are present)])
AS_HELP_STRING([--disable-voiptest], [Disable VoIP test program (don't test for dependencies)])dnl'
)

have_voip=0
AS_IF([test "x$enable_voiptest" != "xno"], [
    have_voip=1
    PKG_CHECK_MODULES([PORTAUDIO], [portaudio-2.0],,[have_voip=0])
    PKG_CHECK_MODULES([SRC], [samplerate],,[have_voip=0])
    PKG_CHECK_MODULES([SPANDSP], [spandsp],,[have_voip=0])
    AC_CHECK_HEADER([codec2.h],, [have_voip=0])
    AC_CHECK_LIB([codec2], [codec2_create], [AC_SUBST(CODEC2_LIBS, -lcodec2)], [have_voip=0])
])
AS_IF([test "x$enable_voiptest" = "xyes" -a "x$have_voip" != "x1" ], [
    AC_MSG_ERROR([Missing VoIP dependencies])
])
AC_SUBST([HAVE_VOIPTEST], $have_voip)

dnl Check for programs.
AC_PROG_CC

dnl Threading
ACX_PTHREAD()

dnl Math library functions for spandsp
AC_CHECK_HEADERS([math.h], [INSERT_MATH_HEADER="#include <math.h>"])
AC_CHECK_HEADERS([float.h])

dnl Check for Linux version of struct ucred
AC_CHECK_MEMBER(struct ucred.uid,
    [AC_DEFINE([HAVE_LINUX_STRUCT_UCRED], 1)],,
    [#include <sys/socket.h>])

dnl Check for BSD version of struct ucred
AC_CHECK_MEMBER(struct xucred.cr_uid,
    [AC_DEFINE([HAVE_BSD_STRUCT_UCRED], 1)],,
    [#include <sys/ucred.h>])

dnl Check for a working Java compiler, keep going if unsuccessful.
dnl *** Kludge: override AC_MSG_ERROR because AC_PROG_JAVAC does not have
dnl *** [if-found] and [if-not-found] action parameters.
pushdef([AC_MSG_ERROR], defn([AC_MSG_WARN]))
AC_PROG_JAVAC
popdef([AC_MSG_ERROR])
AC_SUBST([JAVAC])

dnl Check for JNI includes, keep going if not present.
if test -n "$JAVAC"; then
    dnl *** Kludge: override AC_MSG_ERROR because AC_JNI_INCLUDE_DIR does not have
    dnl *** [if-found] and [if-not-found] action parameters.
    pushdef([AC_MSG_ERROR], defn([AC_MSG_WARN]))
    AC_JNI_INCLUDE_DIR
    for JNI_INCLUDE_DIR in $JNI_INCLUDE_DIRS; do
    CPPFLAGS="$CPPFLAGS -I$JNI_INCLUDE_DIR"
    done
    popdef([AC_MSG_ERROR])
fi

AC_CHECK_LIB(c,srandomdev)

AC_CHECK_HEADERS(
    stdio.h \
    errno.h \
    stdlib.h \
    strings.h \
    unistd.h \
    string.h \
    arpa/inet.h \
    sys/socket.h \
    sys/mman.h \
    sys/time.h \
    sys/ucred.h \
    poll.h \
    netdb.h \
    linux/if.h \
    linux/ioctl.h \
    linux/netlink.h \
    linux/rtnetlink.h \
    net/if.h \
    netinet/in.h \
    ifaddrs.h \
    net/route.h \
    signal.h \
    jni.h \
    alsa/asoundlib.h \
)

echo "Fetching and building NaCl if required."
echo "(this can take HOURS to build depending on your architecture,"
echo " but fortunately it only needs to happen once.)"
cd nacl
./nacl-gcc-prep
cd ..
NACL_INC=`cat nacl/naclinc.txt`
NACL_LIB=`cat nacl/nacllib.txt`
CPPFLAGS="$CPPFLAGS -Inacl/$NACL_INC"
LDFLAGS="$LDFLAGS nacl/$NACL_LIB"
AC_CHECK_HEADER(crypto_sign_edwards25519sha512batch_ref/ge25519.h,
        AC_DEFINE([HAVE_CRYPTO_SIGN_NACL_GE25519_H]),
        [
            dnl A kludge to get to the NaCl ge25519 functions, which are not included in the public API
            dnl in a native build (but are available in the Android build).
            oCPPFLAGS="$CPPFLAGS"
            CPPFLAGS="$CPPFLAGS -Inacl/$NACL_INC -Inacl/${NACL_INC%%/*}/crypto_sign"
            AC_CHECK_HEADER([edwards25519sha512batch/ref/ge25519.h],
                    AC_DEFINE([HAVE_KLUDGE_NACL_GE25519_H]),
                    CPPFLAGS="$oCPPFLAGS"
                )
        ]
    )

AC_CHECK_LIB(m,sqrtf,[LDFLAGS="$LDFLAGS -lm"])
AC_CHECK_LIB(nsl,callrpc,[LDFLAGS="$LDFLAGS -lnsl"])
AC_CHECK_LIB(socket,socket,[LDFLAGS="$LDFLAGS -lsocket"])
AC_CHECK_LIB(dl,dlopen,[LDFLAGS="$LDFLAGS -ldl"])

dnl Some platforms still seem to lack the basic single precision trig and power related function.
AC_SEARCH_LIBS([sinf], [m], AC_DEFINE([HAVE_SINF], [1], [Define to 1 if you have the sinf() function.]))
AC_SEARCH_LIBS([cosf], [m], AC_DEFINE([HAVE_COSF], [1], [Define to 1 if you have the cosf() function.]))
AC_SEARCH_LIBS([tanf], [m], AC_DEFINE([HAVE_TANF], [1], [Define to 1 if you have the tanf() function.]))
AC_SEARCH_LIBS([asinf], [m], AC_DEFINE([HAVE_ASINF], [1], [Define to 1 if you have the asinf() function.]))
AC_SEARCH_LIBS([acosf], [m], AC_DEFINE([HAVE_ACOSF], [1], [Define to 1 if you have the acosf() function.]))
AC_SEARCH_LIBS([atanf], [m], AC_DEFINE([HAVE_ATANF], [1], [Define to 1 if you have the atanf() function.]))
AC_SEARCH_LIBS([atan2f], [m], AC_DEFINE([HAVE_ATAN2F], [1], [Define to 1 if you have the atan2f() function.]))
AC_SEARCH_LIBS([ceilf], [m], AC_DEFINE([HAVE_CEILF], [1], [Define to 1 if you have the ceilf() function.]))
AC_SEARCH_LIBS([floorf], [m], AC_DEFINE([HAVE_FLOORF], [1], [Define to 1 if you have the floorf() function.]))
AC_SEARCH_LIBS([powf], [m], AC_DEFINE([HAVE_POWF], [1], [Define to 1 if you have the powf() function.]))
AC_SEARCH_LIBS([expf], [m], AC_DEFINE([HAVE_EXPF], [1], [Define to 1 if you have the expf() function.]))
AC_SEARCH_LIBS([logf], [m], AC_DEFINE([HAVE_LOGF], [1], [Define to 1 if you have the logf() function.]))
AC_SEARCH_LIBS([log10f], [m], AC_DEFINE([HAVE_LOG10F], [1], [Define to 1 if you have the log10f() function.]))

AC_OUTPUT([
    Makefile
    testconfig.sh
])