File: configure.in

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spectools 201601r1-1
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dnl Blah blah standard autoconf
AC_INIT(Makefile.in)

dnl Host type
AC_CANONICAL_HOST
	
dnl Check for standard tools
AC_PROG_CC

# Liberated from ethereal's configure.in
#
# Add any platform-specific compiler flags needed.
#
AC_MSG_CHECKING(for platform-specific compiler flags)
if test "x$GCC" = x
then
    #
    # Not GCC - assume it's the vendor's compiler.
    #
    case "$host_os" in
    hpux*)
        #
        # HP's ANSI C compiler; flags suggested by Jost Martin.
        # "-Ae" for ANSI C plus extensions such as "long long".
        # "+O2", for optimization.  XXX - works with "-g"?
        #
        CFLAGS="-Ae +O2 $CFLAGS"
        AC_MSG_RESULT(HP ANSI C compiler - added -Ae +O2)
        ;;
    darwin*)
        #
        # It may be called "cc", but it's really a GCC derivative
        # with a problematic special precompiler and precompiled
        # headers; turn off the special precompiler, as some
        # apparently-legal code won't compile with its precompiled
        # headers.
        #
        CFLAGS="-no-cpp-precomp $CFLAGS"
		LIBS="$LIBS -framework IOKit -framework CoreFoundation"
		AC_DEFINE(SYS_DARWIN, 1, Compiling for OSX)
        AC_MSG_RESULT(Apple GCC - added -no-cpp-precomp)
		darwin="yes"
        ;;
	linux*)
		AC_MSG_RESULT(none needed)
		AC_DEFINE(SYS_LINUX, 1, Compiling for Linux OS)
        linux="yes"
		;;
	freebsd*)
		AC_MSG_RESULT(none needed)
		AC_DEFINE(SYS_FREEBSD, 1, Compiling for FreeBSD)
		;;
	openbsd*)
		AC_MSG_RESULT(none needed)
		AC_DEFINE(SYS_OPENBSD, 1, Compiling for OpenBSD)
		;;
	cygwin*)
		AC_MSG_RESULT(none needed)
		AC_DEFINE(SYS_CYGWIN, 1, Compiling for Cygwin)
		cygwin="yes"
		;;
    *)
        AC_MSG_RESULT(none needed)
        ;;
    esac
else
    case "$host_os" in
    solaris*)
        # the X11 headers don't automatically include prototype info
        # and a lot don't include the return type
        CFLAGS="$CFLAGS -Wno-return-type -DFUNCPROTO=15"
        AC_MSG_RESULT(GCC on Solaris - added -Wno-return-type -DFUNCPROTO=15)
        ;;
    darwin*)
        #
        # See comments above about Apple's lovely C compiler.
        #
        CFLAGS="-no-cpp-precomp $CFLAGS"
		LIBS="$LIBS -framework IOKit -framework CoreFoundation"
		AC_DEFINE(SYS_DARWIN, 1, Compiling for OSX)
        AC_MSG_RESULT(Apple GCC - added -no-cpp-precomp)
		darwin="yes"
        ;;
	linux*)
		AC_MSG_RESULT(none needed)
		AC_DEFINE(SYS_LINUX, 1, Compiling for Linux OS)
        linux="yes"
		;;
    freebsd*)
        AC_MSG_RESULT(none needed)
        AC_DEFINE(SYS_FREEBSD, 1, Compiling for FreeBSD)
        ;;
    openbsd*)
       AC_MSG_RESULT(none needed)
        AC_DEFINE(SYS_OPENBSD, 1, Compiling for OpenBSD)
        ;;
	cygwin*)
		AC_MSG_RESULT(none needed)
		AC_DEFINE(SYS_CYGWIN, 1, Compiling for Cygwin)
		cygwin="yes"
		;;
    *)
        AC_MSG_RESULT(none needed)
        ;;
    esac
fi

dnl Check for endian
AC_C_BIGENDIAN

dnl Check for headers and such
AC_HEADER_STDC

TARGETS="spectool_raw spectool_net"

AC_CHECK_HEADERS(stdio.h sys/types.h signal.h sys/socket.h pthread.h)

AC_CHECK_LIB([pthread], [pthread_create], AC_DEFINE(HAVE_LIBPTHREAD, 1, LibPthread) 
			LIBS="$LIBS -lpthread",
			 AC_MSG_ERROR(*** Pthreads required.  Linking -lpthread failed.))

AC_CHECK_LIB([m], [pow], AC_DEFINE(HAVE_LIBM, 1, LibM) 
			LIBS="$LIBS -lm",
			 AC_MSG_ERROR(*** Math lib (libM) required.  Linking -lm failed.))

dnl Look for LibUSB and validate its function
AC_CHECK_HEADER([usb.h], ,AC_MSG_ERROR(*** LibUSB 0.1.x required - Libusb 1.x.x not currently supported, please install libusb-0.1.x or the compatibility layers.))
AC_CHECK_LIB([usb], [usb_init], AC_DEFINE(HAVE_LIBUSB, 1, LibUSB) LIBS="$LIBS -lusb",
			 AC_MSG_ERROR(*** LibUSB 0.1.x required - libusb 1.x.x not currently supported, please install libusb-0.1.x or the compatability layers.  Linking -lusb failed.))

dnl Look for curses/libcurses
termcontrol="none";

AC_CHECK_LIB([ncurses], [initscr], 
			 AC_DEFINE(HAVE_LIBNCURSES, 1, NCurses terminal lib) \
			 foundlcurses=yes curseaux="-lncurses" termcontrol="ncurses" )

if test "$foundlcurses" != "yes"; then
	AC_CHECK_LIB([curses], [initscr],
			 AC_DEFINE(HAVE_LIBCURSES, 1, Curses terminal lib) \
			 foundlcurses=yes curseaux="-lcurses" termcontrol="curses" )
fi

if test "$termcontrol" = "ncurses"; then
	AC_CHECK_HEADER([ncurses.h], [foundhcurses=yes])
elif test "$termcontrol" = "curses"; then
	AC_CHECK_HEADER([curses.h], [foundhcurses=yes])
fi

if test "$foundhcurses$foundlcurses" != "yesyes"; then
	AC_MSG_WARN(*** Could not find curses library.  Curses grapher will not be built.)
else
	TARGETS="$TARGETS spectool_curses"
	CURSLIBS="$curseaux"
fi

dnl bsd/osx doesn't have this
AC_CHECK_HEADER([values.h], AC_DEFINE(HAVE_VALUES_H, 1, values.h header))

dnl Look for gtk-2.0
PKG_CHECK_MODULES(pkggtk2, [gtk+-2.0], pkggtk2=yes, pkggtk2=no)
if test "$pkggtk2" = "yes" -a "$forcegtk" != "1"; then
	GTK_CONFIG="pkg-config gtk+-2.0"
	GTK2="yes"
else
	AC_CHECK_PROG(gtkconf, [gtk-config], yes, no)
	if test "$gtkconf" = "yes" -a "$forcegtk" != "2"; then
		GTK_CONFIG="gtk-config"
	else
		AC_MSG_WARN(*** GTK does not appear to be installed.  GTK client will not be built.)
	fi
fi

dnl Try to link gtk/gdk
if test "$GTK_CONFIG"x != "x"; then
  ocfl="$CFLAGS"
  olfl="$LIBS"
  CFLAGS="$CFLAGS `$GTK_CONFIG --cflags`"
  LIBS="$LIBS `$GTK_CONFIG --libs`"
  
  AC_MSG_CHECKING(that we can link gtk/gdk)
  	AC_LINK_IFELSE([AC_LANG_PROGRAM([[
  	#include <stdio.h>
  	#include <usb.h>
  	#include <gtk/gtk.h>
  	]], [[
  		GdkPixmap *pxm;
  	]])],
  	[
  		AC_MSG_RESULT(yes)
  	],[
  		AC_MSG_RESULT(no)
  		GTK_CONFIG=""
  		AC_MSG_WARN(*** GTK present but could not link a test program ***)
  		CFLAGS="$ocfl"
  		LIBS="$olfl"
  	])
	
	AC_CHECK_HEADER([cairo.h], , AC_MSG_WARN(*** cairo.h graphics header required for gtk UI) && GTK_CONFIG="")
  
  	if test "$GTK_CONFIG"x != "x"; then
		AC_DEFINE(HAVE_GTK, 1, we have a gtk ui)

  		GTKLIBS="$LIBS"
  		LIBS="$olfl"

		if test "$GTK2" = "yes"; then
  			TARGETS="$TARGETS spectool_gtk"
			AC_DEFINE(HAVE_LIB_GTK2, 1, we have libgtk2.x)
		else
			AC_MSG_WARN(*** Gtk2 + Cairo is now required for the GTK ui)
		fi

  	fi

fi

dnl Look for linux headers and if we can issue a HID release
AC_MSG_CHECKING([for Linux headers with DEVFS_DISCONNECT support])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
		#include <stdio.h>
		#include <unistd.h>
		#include <sys/stat.h>
		#include <sys/ioctl.h>
		#include <linux/usbdevice_fs.h>
		#include <errno.h>
		]], [[
		int io = USBDEVFS_DISCONNECT;
		]])],[linux_devfs_discon=yes],[linux_devfs_discon=no])
if test $linux_devfs_discon = "yes"; then
	AC_MSG_RESULT([yes])
	AC_DEFINE(HAVE_LINUX_DEVDISCONNECT, 1, system has HID DEVFS_DISCONNECT)
else
	AC_MSG_RESULT([no])
fi

dnl Replace the values
AC_SUBST(TARGETS)
AC_SUBST(GTKLIBS)
AC_SUBST(HILDLIBS)
AC_SUBST(CURSLIBS)
AC_SUBST(CFLAGS)
	
AC_CONFIG_HEADER(config.h)

dnl Write it
AC_OUTPUT(Makefile)

echo
echo
echo "*** Configuration complete"
echo "*** Check the configure output if a target you want is not configured."
echo "*** The following targets are configured: "
echo "    $TARGETS"