# AC_PREREQ(2.57)
AC_INIT(libssh2, 0.15, libssh2-devel@lists.sourceforge.net)
AM_INIT_AUTOMAKE(libssh2, 0.15)
AC_CONFIG_SRCDIR([src])
AC_CONFIG_HEADER([src/libssh2_config.h])
AB_INIT

# Check for the OS.
# Daniel's note: this should not be necessary and we need to work to
# get this removed.
AC_CANONICAL_HOST
case "$host" in
	*-cygwin)
	CFLAGS="$CFLAGS -DLIBSSH2_WIN32"
    ;;
	*darwin*)
	CFLAGS="$CFLAGS -DLIBSSH2_DARWIN"
	;;
    *hpux*)
    ;;
    *)
    ;;
esac

AC_CHECK_LIB(socket, socket, [
SHLIB_LDFLAGS="$SHLIB_LDFLAGS -lsocket"
LIBS="$LIBS -lsocket"
])

# Solaris has inet_addr in -lnsl.
AC_SEARCH_LIB(inet_addr, nsl)

AC_SUBST(SHLIB_SUFFIX_NAME)
AC_SUBST(SHLIB_LDFLAGS)
AC_SUBST(LIBS)

AC_PROG_CC
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_MAKE_SET
AC_PROG_LIBTOOL
AC_C_BIGENDIAN
if test -z "$PKG_CONFIG"; then
  AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
fi

# Look for libgcrypt.
AC_ARG_WITH(libgcrypt,
  AC_HELP_STRING([--with-libgcrypt],[Use libgcrypt for crypto]),
  use_libgcrypt=$withval,use_libgcrypt=no)
if test "$use_libgcrypt" != "no"; then
  AM_PATH_LIBGCRYPT(1:1.2.2,,use_libgcrypt=no)
fi
if test "$use_libgcrypt" != "no"; then
  CFLAGS="$CFLAGS $LIBGCRYPT_CFLAGS"
  LDFLAGS="$LDFLAGS $LIBGCRYPT_LIBS"
  AC_DEFINE(LIBSSH2_LIBGCRYPT, 1, [Use libgcrypt])
fi
AM_CONDITIONAL(LIBGCRYPT, test "$use_libgcrypt" != "no")

#
# Look for OpenSSL
#
AC_ARG_WITH(openssl,
  AC_HELP_STRING([--with-openssl=DIR],[Look for OpenSSL in PATH]),
  [LIBSSH2_OPENSSL_DIR=$withval],[LIBSSH2_OPENSSL_DIR=yes])

if test "$use_libgcrypt" = "no"; then

if test "$LIBSSH2_OPENSSL_DIR" = "no" || test "$LIBSSH2_OPENSSL_DIR" = "yes"; then
  unset LIBSSH2_OPENSSL_DIR
fi

found_openssl=no
pkgcfg_openssl=no
unset OPENSSL_INCDIR
unset OPENSSL_INCLINE
unset OPENSSL_LIBLINE

AC_MSG_CHECKING([for OpenSSL])

# Explicit path given, use it rather than pkg-config
if test ! -z "$LIBSSH2_OPENSSL_DIR"; then
  found_openssl=yes
  OPENSSL_LIBLINE="-L$LIBSSH2_OPENSSL_DIR/lib -lcrypto"
  OPENSSL_INCLINE="-I$LIBSSH2_OPENSSL_DIR/include"
  OPENSSL_INCDIR=$LIBSSH2_OPENSSL_DIR/include
  AC_MSG_RESULT([Using explicit path $LIBSSH2_OPENSSL_DIR])
fi

# If pkg-config is found try using it
if test "$found_openssl" = "no" && test -x "$PKG_CONFIG" && $PKG_CONFIG --exists openssl; then
  found_openssl=yes
  pkgcfg_openssl=yes
  OPENSSL_LIBLINE=`$PKG_CONFIG --libs openssl`
  OPENSSL_INCLINE=`$PKG_CONFIG --cflags-only-I openssl`
  AC_MSG_RESULT([Using paths from pkg-config])
fi

# Elsewise, search for OpenSSL wherever it might be
if test "$found_openssl" = "no"; then
  OPENSSL_SEARCH_PATH="/usr/local/ssl /usr/local /usr /usr/local/openssl"

  for i in $OPENSSL_SEARCH_PATH; do
    if test -r $i/include/openssl/evp.h; then
      OPENSSL_INCLINE="-I$i/include"
      OPENSSL_INCDIR=$i/include
    fi
    if test -r $i/include/openssl/hmac.h; then
      OPENSSL_INCLINE="-I$i/include"
      OPENSSL_INCDIR=$i/include
    fi
    if test -r $i/lib/libcrypto.a -o -r $i/lib/libcrypto.$SHLIB_SUFFIX_NAME; then
      OPENSSL_LIBLINE="-L$i/lib -lcrypto"
    fi
    test -n "$OPENSSL_INCLINE" && test -n "$OPENSSL_LIBLINE" && break
  done

  if test -z "$OPENSSL_INCLINE"; then
    AC_MSG_ERROR([Cannot find OpenSSL's <evp.h> or <hmac.h>])
  fi

  if test -z "$OPENSSL_LIBLINE"; then
    AC_MSG_ERROR([Cannot find OpenSSL's libcrypto])
  fi

  AC_MSG_RESULT([$OPENSSL_INCLINE $OPENSSL_LIBLINE])
fi

#
# Confirm required OpenSSL libs
#
if test ! "$pkgcfg_openssl" = "yes"; then
  if test ! -r $OPENSSL_INCDIR/openssl/bn.h || test ! -r $OPENSSL_INCDIR/openssl/evp.h || \
     test ! -r $OPENSSL_INCDIR/openssl/hmac.h || test ! -r $OPENSSL_INCDIR/openssl/pem.h || \
     test ! -r $OPENSSL_INCDIR/openssl/sha.h; then
       AC_MSG_ERROR([Missing one or more of <openssl/bn.h>, <openssl/evp.h>, <openssl/hmac.h>, <openssl/pem.h>, <openssl/sha.h>])
  fi
fi

CFLAGS="$CFLAGS $OPENSSL_INCLINE"
LDFLAGS="$LDFLAGS $OPENSSL_LIBLINE"

fi

#
# zlib
#
AC_ARG_WITH(libz,
  AC_HELP_STRING([--with-libz=PATH],[Look for libz in PATH]),
  [LIBSSH2_LIBZ_DIR=$withval],[LIBSSH2_LIBZ_DIR="/usr/local /usr /usr/local/libz /usr/libz /usr/local/zlib /usr/zlib"])

if test "$LIBSSH2_LIBZ_DIR" = "no" || test "$LIBSSH2_LIBZ_DIR" = "yes"; then
  unset LIBSSH2_LIBZ_DIR
fi

unset LIBZ_INCDIR
unset LIBZ_LIBDIR

AC_MSG_CHECKING([for libz])

for i in $LIBSSH2_LIBZ_DIR; do
  if test -r $i/include/zlib.h; then
    LIBZ_INCDIR=$i/include
  fi
  if test -r $i/lib/libz.a -o -r $i/lib/libz.$SHLIB_SUFFIX_NAME; then
    LIBZ_LIBDIR=$i/lib
  fi
  test -n "$LIBZ_INCDIR" && test -n "$LIBZ_LIBDIR" && break
done

if test -n "$LIBZ_INCDIR" && test -n "$LIBZ_LIBDIR"; then
  AC_MSG_RESULT([Found in $LIBZ_INCDIR $LIBZ_LIBDIR])
  CFLAGS="$CFLAGS -I$LIBZ_INCDIR"
  LDFLAGS="$LDFLAGS -L$LIBZ_LIBDIR -lz"
  AC_DEFINE(LIBSSH2_HAVE_ZLIB, 1, [Compile in zlib support])
else
  AC_MSG_RESULT([Cannot find libz's <zlib.h>])
fi

#
# Optional Settings
#
AC_ARG_ENABLE(crypt-none,
  AC_HELP_STRING([--enable-crypt-none],[Permit "none" cipher -- NOT RECOMMENDED]),
  [AC_DEFINE(LIBSSH2_CRYPT_NONE, 1, [Enable "none" cipher -- NOT RECOMMENDED])])

AC_ARG_ENABLE(mac-none,
  AC_HELP_STRING([--enable-mac-none],[Permit "none" MAC -- NOT RECOMMENDED]),
  [AC_DEFINE(LIBSSH2_MAC_NONE, 1, [Enable "none" MAC -- NOT RECOMMENDED])])

AC_ARG_ENABLE(gex-new,
  AC_HELP_STRING([--disable-gex-new],[Disable "new" diffie-hellman-group-exchange-sha1 method]),
  [GEX_NEW=$enableval])
if test "$GEX_NEW" != "no"; then
  AC_DEFINE(LIBSSH2_DH_GEX_NEW, 1, [Enable newer diffie-hellman-group-exchange-sha1 syntax])
fi

dnl ************************************************************
dnl option to switch on compiler debug options
dnl
AC_MSG_CHECKING([whether to enable pedantic and debug compiler options])
AC_ARG_ENABLE(debug,
AC_HELP_STRING([--enable-debug],[Enable pedantic and debug options])
AC_HELP_STRING([--disable-debug],[Disable debug options]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       ;;
  *)   AC_MSG_RESULT(yes)

    CPPFLAGS="$CPPFLAGS -DLIBSSH2DEBUG"
    CFLAGS="$CFLAGS -g"

    dnl set compiler "debug" options to become more picky, and remove
    dnl optimize options from CFLAGS
    CURL_CC_DEBUG_OPTS
       ;;
  esac
 ],
       AC_MSG_RESULT(no)
)

# Checks for header files.
# AC_HEADER_STDC
AC_CHECK_HEADERS([errno.h fcntl.h stdio.h stdlib.h unistd.h sys/uio.h sys/select.h])
AC_CHECK_FUNCS(poll gettimeofday select)

# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE

CURL_CHECK_NONBLOCKING_SOCKET

AC_CONFIG_FILES([Makefile
                 src/Makefile
                 tests/Makefile
                 example/Makefile
                 example/simple/Makefile
                 docs/Makefile])
AC_OUTPUT