configure.ac - htop - Rivoreo Source Code Repositories

 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.

 AC_PREREQ(2.65)
 AC_INIT([htop],[2.0.0],[hisham@gobolinux.org])

 year=$(date +%Y)

 # The following two lines are required by hwloc scripts
 AC_USE_SYSTEM_EXTENSIONS
 AC_CANONICAL_TARGET

 AM_INIT_AUTOMAKE([1.11])
 AC_CONFIG_SRCDIR([htop.c])
 AC_CONFIG_HEADER([config.h])
 AC_CONFIG_MACRO_DIR([m4])

 # Checks for programs.
 # ----------------------------------------------------------------------
 AC_PROG_CC
 AM_PROG_CC_C_O

 AC_DISABLE_SHARED
 AC_ENABLE_STATIC
 AC_PROG_LIBTOOL

 # Checks for platform.
 # ----------------------------------------------------------------------
 case "$target" in
 *linux*)
    my_htop_platform=linux
    ;;
 *freebsd*)
    my_htop_platform=freebsd
    ;;
 *openbsd*)
    my_htop_platform=openbsd
    ;;
 *darwin*)
    my_htop_platform=darwin
    ;;
 *)
    my_htop_platform=unsupported
    ;;
 esac

 # Checks for libraries.
 # ----------------------------------------------------------------------
 AC_CHECK_LIB([m], [ceil], [], [missing_libraries="$missing_libraries libm"])

 # Checks for header files.
 # ----------------------------------------------------------------------
 AC_HEADER_DIRENT
 AC_HEADER_STDC
 AC_CHECK_HEADERS([stdlib.h string.h strings.h sys/param.h sys/time.h unistd.h],[:],[
   missing_headers="$missing_headers $ac_header"
 ])
 AC_CHECK_HEADERS([execinfo.h],[:],[:])

 # Checks for typedefs, structures, and compiler characteristics.
 # ----------------------------------------------------------------------
 AC_HEADER_STDBOOL
 AC_C_CONST
 AC_TYPE_PID_T
 AC_TYPE_UID_T

 # Checks for library functions and compiler features.
 # ----------------------------------------------------------------------
 AC_FUNC_CLOSEDIR_VOID
 AC_TYPE_SIGNAL
 AC_FUNC_STAT
 AC_CHECK_FUNCS([memmove strncasecmp strstr strdup])

 save_cflags="${CFLAGS}"
 CFLAGS="${CFLAGS} -std=c99"
 AC_MSG_CHECKING([whether gcc -std=c99 option works])
 AC_TRY_COMPILE(AC_INCLUDES_DEFAULT, [char *a; a = strdup("foo"); int i = 0; i++; // C99],
    AC_MSG_RESULT([yes]),
    AC_MSG_ERROR([htop is written in C99. A newer version of gcc is required.]))
 CFLAGS="$save_cflags"

 save_cflags="${CFLAGS}"
 CFLAGS="$CFLAGS -Wextra"
 AC_MSG_CHECKING([if compiler supports -Wextra])
 AC_TRY_COMPILE([], [], [
    wextra_flag=-Wextra
    AC_MSG_RESULT([yes])
 ],[
    wextra_flag=
    AC_MSG_RESULT([no])
 ])
 CFLAGS="$save_cflags"
 AC_SUBST(wextra_flag)

 # Checks for features and flags.
 # ----------------------------------------------------------------------
 PROCDIR=/proc

 AC_ARG_ENABLE(proc, [AC_HELP_STRING([--enable-proc], [use Linux-compatible proc filesystem])], enable_proc="yes", enable_proc="no")
 if test "x$enable_proc" = xyes; then
    # An enabled proc assumes we're emulating Linux.
    my_htop_platform=linux
    AC_DEFINE(HAVE_PROC, 1, [Define if using a Linux-compatible proc filesystem.])
 fi

 AC_ARG_WITH(proc, [AC_HELP_STRING([--with-proc=DIR], [Location of a Linux-compatible proc filesystem (default=/proc).])],

 if test -n "$withval"; then
    AC_DEFINE_UNQUOTED(PROCDIR, "$withval", [Path of proc filesystem])
    PROCDIR="$withval"
 fi,
 AC_DEFINE(PROCDIR, "/proc", [Path of proc filesystem]))

 if test "x$cross_compiling" = xno; then
    if test "x$enable_proc" = xyes; then
       AC_CHECK_FILE($PROCDIR/stat,,AC_MSG_ERROR(Cannot find $PROCDIR/stat. Make sure you have a Linux-compatible /proc filesystem mounted. See the file README for help.))
       AC_CHECK_FILE($PROCDIR/meminfo,,AC_MSG_ERROR(Cannot find $PROCDIR/meminfo. Make sure you have a Linux-compatible /proc filesystem mounted. See the file README for help.))
    fi
 fi

 AC_ARG_ENABLE(openvz, [AC_HELP_STRING([--enable-openvz], [enable OpenVZ support])], ,enable_openvz="no")
 if test "x$enable_openvz" = xyes; then
    AC_DEFINE(HAVE_OPENVZ, 1, [Define if openvz support enabled.])
 fi

 AC_ARG_ENABLE(cgroup, [AC_HELP_STRING([--enable-cgroup], [enable cgroups support])], ,enable_cgroup="no")
 if test "x$enable_cgroup" = xyes; then
    AC_DEFINE(HAVE_CGROUP, 1, [Define if cgroup support enabled.])
 fi

 AC_ARG_ENABLE(vserver, [AC_HELP_STRING([--enable-vserver], [enable VServer support])], ,enable_vserver="no")
 if test "x$enable_vserver" = xyes; then
     AC_DEFINE(HAVE_VSERVER, 1, [Define if vserver support enabled.])
 fi

 AC_ARG_ENABLE(ancient_vserver, [AC_HELP_STRING([--enable-ancient-vserver], [enable ancient VServer support (implies --enable-vserver)])], ,enable_ancient_vserver="no")
 if test "x$enable_ancient_vserver" = xyes; then
     AC_DEFINE(HAVE_VSERVER, 1, [Define if vserver support enabled.])
     AC_DEFINE(HAVE_ANCIENT_VSERVER, 1, [Define if ancient vserver support enabled.])
 fi

 AC_ARG_ENABLE(taskstats, [AC_HELP_STRING([--enable-taskstats], [enable per-task IO Stats (taskstats kernel sup required)])], ,enable_taskstats="yes")
 if test "x$enable_taskstats" = xyes; then
     AC_DEFINE(HAVE_TASKSTATS, 1, [Define if taskstats support enabled.])
 fi

 # HTOP_CHECK_SCRIPT(LIBNAME, FUNCTION, DEFINE, CONFIG_SCRIPT, ELSE_PART)
 m4_define([HTOP_CHECK_SCRIPT],
 [
    htop_config_script=$([$4] --libs 2> /dev/null)
    htop_script_success=no
    htop_save_LDFLAGS="$LDFLAGS"
    if test ! "x$htop_config_script" = x; then
       LDFLAGS="$htop_config_script $LDFLAGS"
       AC_CHECK_LIB([$1], [$2], [
          AC_DEFINE([$3], 1, [The library is present.])
          LIBS="$htop_config_script $LIBS "
          htop_script_success=yes
       ], [])
       LDFLAGS="$save_LDFLAGS"
    fi
    if test "x$htop_script_success" = xno; then
       [$5]
    fi
 ])

 # HTOP_CHECK_LIB(LIBNAME, FUNCTION, DEFINE, ELSE_PART)
 m4_define([HTOP_CHECK_LIB],
 [
    AC_CHECK_LIB([$1], [$2], [
       AC_DEFINE([$3], 1, [The library is present.])
       LIBS="-l[$1] $LIBS "
    ], [$4])
 ])

 AC_ARG_ENABLE(unicode, [AC_HELP_STRING([--enable-unicode], [enable Unicode support])], ,enable_unicode="yes")
 if test "x$enable_unicode" = xyes; then
    HTOP_CHECK_SCRIPT([ncursesw6], [addnwstr], [HAVE_LIBNCURSESW], "ncursesw6-config",
     HTOP_CHECK_SCRIPT([ncursesw], [addnwstr], [HAVE_LIBNCURSESW], "ncursesw5-config",
      HTOP_CHECK_SCRIPT([ncurses], [addnwstr], [HAVE_LIBNCURSESW], "ncurses5-config",
       HTOP_CHECK_LIB([ncursesw6], [addnwstr], [HAVE_LIBNCURSESW],
        HTOP_CHECK_LIB([ncursesw], [addnwstr], [HAVE_LIBNCURSESW],
         HTOP_CHECK_LIB([ncurses], [addnwstr], [HAVE_LIBNCURSESW],
       missing_libraries="$missing_libraries libncursesw"
       AC_MSG_ERROR([You may want to use --disable-unicode or install libncursesw.])
    ))))))

    AC_CHECK_HEADERS([ncursesw/curses.h],[:],
       [AC_CHECK_HEADERS([ncurses/ncurses.h],[:],
          [AC_CHECK_HEADERS([ncurses/curses.h],[:],
             [AC_CHECK_HEADERS([ncurses.h],[:],[missing_headers="$missing_headers $ac_header"])])])])
 else
    HTOP_CHECK_SCRIPT([ncurses6], [refresh], [HAVE_LIBNCURSES], "ncurses6-config",
     HTOP_CHECK_SCRIPT([ncurses], [refresh], [HAVE_LIBNCURSES], "ncurses5-config",
      HTOP_CHECK_LIB([ncurses6],  [refresh], [HAVE_LIBNCURSES],
       HTOP_CHECK_LIB([ncurses],  [refresh], [HAVE_LIBNCURSES],
       missing_libraries="$missing_libraries libncurses"
    ))))

    AC_CHECK_HEADERS([curses.h],[:],
       [AC_CHECK_HEADERS([ncurses/curses.h],[:],
          [AC_CHECK_HEADERS([ncurses/ncurses.h],[:],
             [AC_CHECK_HEADERS([ncurses.h],[:],[missing_headers="$missing_headers $ac_header"])])])])
 fi

 if test "$my_htop_platform" = "freebsd"; then
    AC_CHECK_LIB([kvm], [kvm_open], [], [missing_libraries="$missing_libraries libkvm"])
 fi

 if test "$my_htop_platform" = "openbsd"; then
    AC_CHECK_LIB([kvm], [kvm_open], [], [missing_libraries="$missing_libraries libkvm"])
 fi

 AC_ARG_ENABLE(linux_affinity, [AC_HELP_STRING([--enable-linux-affinity], [enable Linux sched_setaffinity and sched_getaffinity for affinity support, disables hwloc])], ,enable_linux_affinity="yes")
 if test "x$enable_linux_affinity" = xyes -a "x$cross_compiling" = xno; then
    AC_MSG_CHECKING([for usable sched_setaffinity])
    AC_RUN_IFELSE([
      AC_LANG_PROGRAM([[
        #include <sched.h>
        #include <errno.h>
        static cpu_set_t cpuset;
        ]], [[
        CPU_ZERO(&cpuset);
        sched_setaffinity(0, sizeof(cpu_set_t), &cpuset);
        if (errno == ENOSYS) return 1;
        ]])],
      [AC_MSG_RESULT([yes])],
      [enable_linux_affinity=no
       AC_MSG_RESULT([no])])
 fi
 if test "x$enable_linux_affinity" = xyes; then
    AC_DEFINE(HAVE_LINUX_AFFINITY, 1, [Define if Linux sched_setaffinity and sched_getaffinity are to be used.])
 fi

 AC_ARG_ENABLE(hwloc, [AC_HELP_STRING([--enable-hwloc], [enable hwloc support for CPU affinity])],, enable_hwloc="no")
 if test "x$enable_hwloc" = xyes
 then
    AC_CHECK_LIB([hwloc], [hwloc_get_proc_cpubind], [], [missing_libraries="$missing_libraries libhwloc"])
    AC_CHECK_HEADERS([hwloc.h],[:], [missing_headers="$missing_headers $ac_header"])
 fi

 # Bail out on errors.
 # ----------------------------------------------------------------------
 if test ! -z "$missing_libraries"; then
   AC_MSG_ERROR([missing libraries: $missing_libraries])
 fi
 if test ! -z "$missing_headers"; then
   AC_MSG_ERROR([missing headers: $missing_headers])
 fi

 AC_DEFINE_UNQUOTED(COPYRIGHT, "(C) 2004-$year Hisham Muhammad", [Copyright message.])

 # We're done, let's go!
 # ----------------------------------------------------------------------
 AM_CONDITIONAL([HTOP_LINUX], [test "$my_htop_platform" = linux])
 AM_CONDITIONAL([HTOP_FREEBSD], [test "$my_htop_platform" = freebsd])
 AM_CONDITIONAL([HTOP_OPENBSD], [test "$my_htop_platform" = openbsd])
 AM_CONDITIONAL([HTOP_DARWIN], [test "$my_htop_platform" = darwin])
 AM_CONDITIONAL([HTOP_UNSUPPORTED], [test "$my_htop_platform" = unsupported])
 AC_SUBST(my_htop_platform)
 AC_CONFIG_FILES([Makefile htop.1])
 AC_OUTPUT
	# -- Autoconf --
	# Process this file with autoconf to produce a configure script.

	AC_PREREQ(2.65)
	AC_INIT([htop],[2.0.0],[hisham@gobolinux.org])

	year=$(date +%Y)

	# The following two lines are required by hwloc scripts
	AC_USE_SYSTEM_EXTENSIONS
	AC_CANONICAL_TARGET

	AM_INIT_AUTOMAKE([1.11])
	AC_CONFIG_SRCDIR([htop.c])
	AC_CONFIG_HEADER([config.h])
	AC_CONFIG_MACRO_DIR([m4])

	# Checks for programs.
	# ----------------------------------------------------------------------
	AC_PROG_CC
	AM_PROG_CC_C_O

	AC_DISABLE_SHARED
	AC_ENABLE_STATIC
	AC_PROG_LIBTOOL

	# Checks for platform.
	# ----------------------------------------------------------------------
	case "$target" in
	linux)
	my_htop_platform=linux
	;;
	freebsd)
	my_htop_platform=freebsd
	;;
	openbsd)
	my_htop_platform=openbsd
	;;
	darwin)
	my_htop_platform=darwin
	;;
	*)
	my_htop_platform=unsupported
	;;
	esac

	# Checks for libraries.
	# ----------------------------------------------------------------------
	AC_CHECK_LIB([m], [ceil], [], [missing_libraries="$missing_libraries libm"])

	# Checks for header files.
	# ----------------------------------------------------------------------
	AC_HEADER_DIRENT
	AC_HEADER_STDC
	AC_CHECK_HEADERS([stdlib.h string.h strings.h sys/param.h sys/time.h unistd.h],[:],[
	missing_headers="$missing_headers $ac_header"
	])
	AC_CHECK_HEADERS([execinfo.h],[:],[:])

	# Checks for typedefs, structures, and compiler characteristics.
	# ----------------------------------------------------------------------
	AC_HEADER_STDBOOL
	AC_C_CONST
	AC_TYPE_PID_T
	AC_TYPE_UID_T

	# Checks for library functions and compiler features.
	# ----------------------------------------------------------------------
	AC_FUNC_CLOSEDIR_VOID
	AC_TYPE_SIGNAL
	AC_FUNC_STAT
	AC_CHECK_FUNCS([memmove strncasecmp strstr strdup])

	save_cflags="${CFLAGS}"
	CFLAGS="${CFLAGS} -std=c99"
	AC_MSG_CHECKING([whether gcc -std=c99 option works])
	AC_TRY_COMPILE(AC_INCLUDES_DEFAULT, [char *a; a = strdup("foo"); int i = 0; i++; // C99],
	AC_MSG_RESULT([yes]),
	AC_MSG_ERROR([htop is written in C99. A newer version of gcc is required.]))
	CFLAGS="$save_cflags"

	save_cflags="${CFLAGS}"
	CFLAGS="$CFLAGS -Wextra"
	AC_MSG_CHECKING([if compiler supports -Wextra])
	AC_TRY_COMPILE([], [], [
	wextra_flag=-Wextra
	AC_MSG_RESULT([yes])
	],[
	wextra_flag=
	AC_MSG_RESULT([no])
	])
	CFLAGS="$save_cflags"
	AC_SUBST(wextra_flag)

	# Checks for features and flags.
	# ----------------------------------------------------------------------
	PROCDIR=/proc

	AC_ARG_ENABLE(proc, [AC_HELP_STRING([--enable-proc], [use Linux-compatible proc filesystem])], enable_proc="yes", enable_proc="no")
	if test "x$enable_proc" = xyes; then
	# An enabled proc assumes we're emulating Linux.
	my_htop_platform=linux
	AC_DEFINE(HAVE_PROC, 1, [Define if using a Linux-compatible proc filesystem.])
	fi

	AC_ARG_WITH(proc, [AC_HELP_STRING([--with-proc=DIR], [Location of a Linux-compatible proc filesystem (default=/proc).])],

	if test -n "$withval"; then
	AC_DEFINE_UNQUOTED(PROCDIR, "$withval", [Path of proc filesystem])
	PROCDIR="$withval"
	fi,
	AC_DEFINE(PROCDIR, "/proc", [Path of proc filesystem]))

	if test "x$cross_compiling" = xno; then
	if test "x$enable_proc" = xyes; then
	AC_CHECK_FILE($PROCDIR/stat,,AC_MSG_ERROR(Cannot find $PROCDIR/stat. Make sure you have a Linux-compatible /proc filesystem mounted. See the file README for help.))
	AC_CHECK_FILE($PROCDIR/meminfo,,AC_MSG_ERROR(Cannot find $PROCDIR/meminfo. Make sure you have a Linux-compatible /proc filesystem mounted. See the file README for help.))
	fi
	fi

	AC_ARG_ENABLE(openvz, [AC_HELP_STRING([--enable-openvz], [enable OpenVZ support])], ,enable_openvz="no")
	if test "x$enable_openvz" = xyes; then
	AC_DEFINE(HAVE_OPENVZ, 1, [Define if openvz support enabled.])
	fi

	AC_ARG_ENABLE(cgroup, [AC_HELP_STRING([--enable-cgroup], [enable cgroups support])], ,enable_cgroup="no")
	if test "x$enable_cgroup" = xyes; then
	AC_DEFINE(HAVE_CGROUP, 1, [Define if cgroup support enabled.])
	fi

	AC_ARG_ENABLE(vserver, [AC_HELP_STRING([--enable-vserver], [enable VServer support])], ,enable_vserver="no")
	if test "x$enable_vserver" = xyes; then
	AC_DEFINE(HAVE_VSERVER, 1, [Define if vserver support enabled.])
	fi

	AC_ARG_ENABLE(ancient_vserver, [AC_HELP_STRING([--enable-ancient-vserver], [enable ancient VServer support (implies --enable-vserver)])], ,enable_ancient_vserver="no")
	if test "x$enable_ancient_vserver" = xyes; then
	AC_DEFINE(HAVE_VSERVER, 1, [Define if vserver support enabled.])
	AC_DEFINE(HAVE_ANCIENT_VSERVER, 1, [Define if ancient vserver support enabled.])
	fi

	AC_ARG_ENABLE(taskstats, [AC_HELP_STRING([--enable-taskstats], [enable per-task IO Stats (taskstats kernel sup required)])], ,enable_taskstats="yes")
	if test "x$enable_taskstats" = xyes; then
	AC_DEFINE(HAVE_TASKSTATS, 1, [Define if taskstats support enabled.])
	fi

	# HTOP_CHECK_SCRIPT(LIBNAME, FUNCTION, DEFINE, CONFIG_SCRIPT, ELSE_PART)
	m4_define([HTOP_CHECK_SCRIPT],
	[
	htop_config_script=$([$4] --libs 2> /dev/null)
	htop_script_success=no
	htop_save_LDFLAGS="$LDFLAGS"
	if test ! "x$htop_config_script" = x; then
	LDFLAGS="$htop_config_script $LDFLAGS"
	AC_CHECK_LIB([$1], [$2], [
	AC_DEFINE([$3], 1, [The library is present.])
	LIBS="$htop_config_script $LIBS "
	htop_script_success=yes
	], [])
	LDFLAGS="$save_LDFLAGS"
	fi
	if test "x$htop_script_success" = xno; then
	[$5]
	fi
	])

	# HTOP_CHECK_LIB(LIBNAME, FUNCTION, DEFINE, ELSE_PART)
	m4_define([HTOP_CHECK_LIB],
	[
	AC_CHECK_LIB([$1], [$2], [
	AC_DEFINE([$3], 1, [The library is present.])
	LIBS="-l[$1] $LIBS "
	], [$4])
	])

	AC_ARG_ENABLE(unicode, [AC_HELP_STRING([--enable-unicode], [enable Unicode support])], ,enable_unicode="yes")
	if test "x$enable_unicode" = xyes; then
	HTOP_CHECK_SCRIPT([ncursesw6], [addnwstr], [HAVE_LIBNCURSESW], "ncursesw6-config",
	HTOP_CHECK_SCRIPT([ncursesw], [addnwstr], [HAVE_LIBNCURSESW], "ncursesw5-config",
	HTOP_CHECK_SCRIPT([ncurses], [addnwstr], [HAVE_LIBNCURSESW], "ncurses5-config",
	HTOP_CHECK_LIB([ncursesw6], [addnwstr], [HAVE_LIBNCURSESW],
	HTOP_CHECK_LIB([ncursesw], [addnwstr], [HAVE_LIBNCURSESW],
	HTOP_CHECK_LIB([ncurses], [addnwstr], [HAVE_LIBNCURSESW],
	missing_libraries="$missing_libraries libncursesw"
	AC_MSG_ERROR([You may want to use --disable-unicode or install libncursesw.])
	))))))

	AC_CHECK_HEADERS([ncursesw/curses.h],[:],
	[AC_CHECK_HEADERS([ncurses/ncurses.h],[:],
	[AC_CHECK_HEADERS([ncurses/curses.h],[:],
	[AC_CHECK_HEADERS([ncurses.h],[:],[missing_headers="$missing_headers $ac_header"])])])])
	else
	HTOP_CHECK_SCRIPT([ncurses6], [refresh], [HAVE_LIBNCURSES], "ncurses6-config",
	HTOP_CHECK_SCRIPT([ncurses], [refresh], [HAVE_LIBNCURSES], "ncurses5-config",
	HTOP_CHECK_LIB([ncurses6], [refresh], [HAVE_LIBNCURSES],
	HTOP_CHECK_LIB([ncurses], [refresh], [HAVE_LIBNCURSES],
	missing_libraries="$missing_libraries libncurses"
	))))

	AC_CHECK_HEADERS([curses.h],[:],
	[AC_CHECK_HEADERS([ncurses/curses.h],[:],
	[AC_CHECK_HEADERS([ncurses/ncurses.h],[:],
	[AC_CHECK_HEADERS([ncurses.h],[:],[missing_headers="$missing_headers $ac_header"])])])])
	fi

	if test "$my_htop_platform" = "freebsd"; then
	AC_CHECK_LIB([kvm], [kvm_open], [], [missing_libraries="$missing_libraries libkvm"])
	fi

	if test "$my_htop_platform" = "openbsd"; then
	AC_CHECK_LIB([kvm], [kvm_open], [], [missing_libraries="$missing_libraries libkvm"])
	fi

	AC_ARG_ENABLE(linux_affinity, [AC_HELP_STRING([--enable-linux-affinity], [enable Linux sched_setaffinity and sched_getaffinity for affinity support, disables hwloc])], ,enable_linux_affinity="yes")
	if test "x$enable_linux_affinity" = xyes -a "x$cross_compiling" = xno; then
	AC_MSG_CHECKING([for usable sched_setaffinity])
	AC_RUN_IFELSE([
	AC_LANG_PROGRAM([[
	#include <sched.h>
	#include <errno.h>
	static cpu_set_t cpuset;
	]], [[
	CPU_ZERO(&cpuset);
	sched_setaffinity(0, sizeof(cpu_set_t), &cpuset);
	if (errno == ENOSYS) return 1;
	]])],
	[AC_MSG_RESULT([yes])],
	[enable_linux_affinity=no
	AC_MSG_RESULT([no])])
	fi
	if test "x$enable_linux_affinity" = xyes; then
	AC_DEFINE(HAVE_LINUX_AFFINITY, 1, [Define if Linux sched_setaffinity and sched_getaffinity are to be used.])
	fi

	AC_ARG_ENABLE(hwloc, [AC_HELP_STRING([--enable-hwloc], [enable hwloc support for CPU affinity])],, enable_hwloc="no")
	if test "x$enable_hwloc" = xyes
	then
	AC_CHECK_LIB([hwloc], [hwloc_get_proc_cpubind], [], [missing_libraries="$missing_libraries libhwloc"])
	AC_CHECK_HEADERS([hwloc.h],[:], [missing_headers="$missing_headers $ac_header"])
	fi

	# Bail out on errors.
	# ----------------------------------------------------------------------
	if test ! -z "$missing_libraries"; then
	AC_MSG_ERROR([missing libraries: $missing_libraries])
	fi
	if test ! -z "$missing_headers"; then
	AC_MSG_ERROR([missing headers: $missing_headers])
	fi

	AC_DEFINE_UNQUOTED(COPYRIGHT, "(C) 2004-$year Hisham Muhammad", [Copyright message.])

	# We're done, let's go!
	# ----------------------------------------------------------------------
	AM_CONDITIONAL([HTOP_LINUX], [test "$my_htop_platform" = linux])
	AM_CONDITIONAL([HTOP_FREEBSD], [test "$my_htop_platform" = freebsd])
	AM_CONDITIONAL([HTOP_OPENBSD], [test "$my_htop_platform" = openbsd])
	AM_CONDITIONAL([HTOP_DARWIN], [test "$my_htop_platform" = darwin])
	AM_CONDITIONAL([HTOP_UNSUPPORTED], [test "$my_htop_platform" = unsupported])
	AC_SUBST(my_htop_platform)
	AC_CONFIG_FILES([Makefile htop.1])
	AC_OUTPUT