AC_PREREQ([2.68])
AC_INIT([telegram-cli], [1.0])
AC_CONFIG_SRCDIR([config.h.in])
AC_CONFIG_HEADERS([config.h])

m4_include([ax_lua.m4])
m4_include([m4_ax_check_openssl.m4])
m4_include([m4_ax_check_zlib.m4])
m4_include([m4-ax_gcc_builtin.m4])

# Checks for programs.
AC_PROG_CC

# BSD locations for headers and libraries from packages, Linux locations for self-compiled stuff.
CPPFLAGS="$CPPFLAGS -I/usr/local/include"
LDFLAGS="$LDFLAGS -L/usr/local/lib"

# Checks for libraries.
AC_CHECK_LIB([m], [sqrt])
AC_SEARCH_LIBS([clock_gettime], [rt])
AC_SEARCH_LIBS([backtrace], [execinfo])
AC_CHECK_LIB([event], [event_base_new], [], [AC_MSG_ERROR([no libevent found])])

EVENT_VER=""

AC_CHECK_HEADER(event2/event.h, [AC_DEFINE([EVENT_V2], [1], [Use libevent v2])], [
  AC_CHECK_HEADER(event.h, [AC_DEFINE([EVENT_V1], [1], [Use libevent v1])], [AC_MSG_ERROR([no libevent found])])
  ])

EXTRA_LIBS=""

#     OPENSSL_INCLUDES to the include directives required
#     OPENSSL_LIBS to the -l directives required
#     OPENSSL_LDFLAGS to the -L or -R flags required

AX_CHECK_OPENSSL(,[AC_MSG_ERROR([No openssl found])])
AX_CHECK_ZLIB(, [AC_MSG_ERROR([No zlib found])])

AC_CHECK_LIB([readline], [rl_save_prompt], [ EXTRA_LIBS="${EXTRA_LIBS} -lreadline" ; ], [AC_MSG_ERROR([no libreadline found])])

AC_MSG_CHECKING([for libconfig])
AC_ARG_ENABLE(libconfig,[--enable-libconfig/--disable-libconfig],
  [ 
  if test "x$enableval" = "xno" ; then
    AC_MSG_RESULT([disabled])
  else
    AC_MSG_RESULT([enabled])
    AC_CHECK_LIB([config],[config_init],[],AC_MSG_ERROR([No libconfig found. Try --disable-libconfig]))
  fi 
  ],[
    AC_MSG_RESULT([enabled])
    AC_CHECK_LIB([config],[config_init],[],AC_MSG_ERROR([No libconfig found. Try --disable-libconfig]))
  ])

AC_MSG_CHECKING([for liblua])
AC_ARG_ENABLE(liblua,[--enable-liblua/--disable-liblua],
  [ 
  if test "x$enableval" = "xno" ; then
    AC_MSG_RESULT([disabled])
  else
    AC_MSG_RESULT([enabled])
    AX_PROG_LUA([],[],
      [
        AX_LUA_HEADERS([],[AC_MSG_ERROR([No lua headers found. Try --disable-liblua])])
        AX_LUA_LIBS([],[AC_MSG_ERROR([No lua libs found. Try --disable-liblua])])
        [EXTRA_LIBS="${EXTRA_LIBS} ${LUA_LIB}" ; ]
        [CPPFLAGS="${CPPFLAGS} ${LUA_INCLUDE}" ; ]
        AC_DEFINE(USE_LUA,1,[use lua])
      ],
      [
        AC_MSG_ERROR([No lua found. Try --disable-liblua])
      ])
  fi 
  ],[
    AC_MSG_RESULT([enabled])
    AX_PROG_LUA([],[],
      [
        AX_LUA_HEADERS([],[AC_MSG_ERROR([No lua headers found. Try --disable-liblua])])
        AX_LUA_LIBS([],[AC_MSG_ERROR([No lua libs found. Try --disable-liblua])])
        [EXTRA_LIBS="${EXTRA_LIBS} ${LUA_LIB}" ; ]
        [CPPFLAGS="${CPPFLAGS} ${LUA_INCLUDE}" ; ]
        AC_DEFINE(USE_LUA,1,[use lua])
      ],
      [
        AC_MSG_ERROR([No lua found. Try --disable-liblua])
      ])
  ])

#check for custom prog name
AC_ARG_WITH(progname,[--with-progname=<name>],
  [ 
  if test "x$with_progname" = "xno" ; then
    AC_MSG_RESULT([default])
  elif test "x$with_progname" = "xyes" ; then
    AC_MSG_RESULT([default])
  else
    AC_MSG_RESULT(["$with_progname"])
    AC_DEFINE_UNQUOTED([PROG_NAME], ["$with_progname"], [Use custom prog name])
  fi
  ],[
    AC_MSG_RESULT([default])
  ])
    
# Checks for header files.
AC_CHECK_HEADERS([execinfo.h fcntl.h malloc.h netdb.h stdlib.h string.h unistd.h arpa/inet.h mach/mach.h netinet/in.h sys/file.h sys/socket.h termios.h])

# Checks for typedefs, structures, and compiler characteristics.
AC_TYPE_SIZE_T
AC_TYPE_UID_T
AC_C_INLINE

# Checks for library functions.
AC_FUNC_MALLOC
AC_FUNC_REALLOC
AC_CHECK_FUNCS([alarm endpwent memset memmove mkdir select socket strdup strndup uname])

AX_GCC_BUILTIN(__builtin_bswap32)

AC_SUBST(EXTRA_LIBS)
AC_CONFIG_FILES([Makefile])
AC_OUTPUT