ConkyPlatformChecks.cmake

#
# Conky, a system monitor, based on torsmo
#
# Please see COPYING for details
#
# Copyright (c) 2005-2018 Brenden Matthews, et. al. (see AUTHORS)
# All rights reserved.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

include(FindPkgConfig)
include(CheckFunctionExists)
include(CheckIncludeFiles)
include(CheckSymbolExists)

# Check for some headers
check_include_files(sys/statfs.h HAVE_SYS_STATFS_H)
check_include_files(sys/param.h HAVE_SYS_PARAM_H)
check_include_files(sys/inotify.h HAVE_SYS_INOTIFY_H)
check_include_files(dirent.h HAVE_DIRENT_H)

# Check for some functions
check_function_exists(strndup HAVE_STRNDUP)

check_symbol_exists(pipe2 "unistd.h" HAVE_PIPE2)
check_symbol_exists(O_CLOEXEC "fcntl.h" HAVE_O_CLOEXEC)

if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
  check_symbol_exists(statfs64 "sys/mount.h" HAVE_STATFS64)
else(CMAKE_SYSTEM_NAME MATCHES "Darwin")
  check_symbol_exists(statfs64 "sys/statfs.h" HAVE_STATFS64)
endif(CMAKE_SYSTEM_NAME MATCHES "Darwin")

AC_SEARCH_LIBS(clock_gettime "time.h" CLOCK_GETTIME_LIB "rt")
if(NOT DEFINED CLOCK_GETTIME_LIB)
  if(NOT CMAKE_SYSTEM_NAME MATCHES "Darwin")
    message(FATAL_ERROR "clock_gettime not found.")
  endif(NOT CMAKE_SYSTEM_NAME MATCHES "Darwin")
else(NOT DEFINED CLOCK_GETTIME_LIB)
  set(HAVE_CLOCK_GETTIME 1)
endif(NOT DEFINED CLOCK_GETTIME_LIB)
set(conky_libs ${conky_libs} ${CLOCK_GETTIME_LIB})

# standard path to search for includes
set(INCLUDE_SEARCH_PATH /usr/include /usr/local/include)

# Set system vars
if(CMAKE_SYSTEM_NAME MATCHES "Linux")
  set(OS_LINUX true)
endif(CMAKE_SYSTEM_NAME MATCHES "Linux")

if(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
  set(OS_FREEBSD true)
  set(conky_libs ${conky_libs} -lkvm -ldevstat -lbsd)
endif(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")

if(CMAKE_SYSTEM_NAME MATCHES "DragonFly")
  set(OS_DRAGONFLY true)
  set(conky_libs ${conky_libs} -ldevstat)
endif(CMAKE_SYSTEM_NAME MATCHES "DragonFly")

if(CMAKE_SYSTEM_NAME MATCHES "OpenBSD")
  set(OS_OPENBSD true)
endif(CMAKE_SYSTEM_NAME MATCHES "OpenBSD")

if(CMAKE_SYSTEM_NAME MATCHES "SunOS")
  set(OS_SOLARIS true)
  set(conky_libs ${conky_libs} -lkstat)
endif(CMAKE_SYSTEM_NAME MATCHES "SunOS")

if(CMAKE_SYSTEM_NAME MATCHES "NetBSD")
  set(OS_NETBSD true)
endif(CMAKE_SYSTEM_NAME MATCHES "NetBSD")

if(CMAKE_SYSTEM_NAME MATCHES "Haiku")
  set(OS_HAIKU true)
  set(conky_libs ${conky_libs} -lnetwork -lintl)
endif(CMAKE_SYSTEM_NAME MATCHES "Haiku")

if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
  set(OS_DARWIN true)
endif(CMAKE_SYSTEM_NAME MATCHES "Darwin")

if(NOT OS_LINUX AND NOT OS_FREEBSD AND NOT OS_OPENBSD AND NOT OS_DRAGONFLY
    AND NOT OS_SOLARIS AND NOT OS_HAIKU AND NOT OS_DARWIN)
  message(FATAL_ERROR "Your platform, '${CMAKE_SYSTEM_NAME}', is not currently supported.  Patches are welcome.")
endif(NOT OS_LINUX AND NOT OS_FREEBSD AND NOT OS_OPENBSD AND NOT OS_DRAGONFLY
  AND NOT OS_SOLARIS AND NOT OS_HAIKU AND NOT OS_DARWIN)

# Check for soundcard header
if(OS_LINUX)
  check_include_files("linux/soundcard.h" HAVE_SOME_SOUNDCARD_H)
  check_include_files("linux/soundcard.h" HAVE_LINUX_SOUNDCARD_H)
elseif(OS_OPENBSD)
  check_include_files("soundcard.h" HAVE_SOME_SOUNDCARD_H)
else(OS_LINUX)
  check_include_files("sys/soundcard.h" HAVE_SOME_SOUNDCARD_H)
endif(OS_LINUX)

if(BUILD_I18N AND OS_DRAGONFLY)
  set(conky_libs ${conky_libs} -lintl)
endif(BUILD_I18N AND OS_DRAGONFLY)

if(BUILD_I18N AND OS_DARWIN)
  find_path(LIBINTL_H_N libintl.h PATHS
    /usr/local/opt/gettext/include
    /usr/include
    /usr/local/include
    /usr/local/opt/include
    )
  if(LIBINTL_H_N)
    include_directories(${LIBINTL_H_N})
  else(LIBINTL_H_N)
    message(FATAL_ERROR "Unable to find libintl.h (try `brew install gettext`)")
  endif(LIBINTL_H_N)
  find_library(INTL_LIB NAMES intl PATHS
    /usr/local/opt/gettext/lib
    /usr/lib
    /usr/local/lib
    /usr/local/opt/lib
    )
  set(conky_libs ${conky_libs} ${INTL_LIB})
endif(BUILD_I18N AND OS_DARWIN)

if(BUILD_NCURSES AND OS_DARWIN)
  set(conky_libs ${conky_libs} -lncurses)
endif(BUILD_NCURSES AND OS_DARWIN)

if(BUILD_MATH)
  set(conky_libs ${conky_libs} -lm)
endif(BUILD_MATH)

if(BUILD_ICAL)
  check_include_files(libical/ical.h ICAL_H_)
  if(NOT ICAL_H_)
    message(FATAL_ERROR "Unable to find libical")
  endif(NOT ICAL_H_)
  set(conky_libs ${conky_libs} -lical)
endif(BUILD_ICAL)

if(BUILD_IRC)
  find_path(IRC_H_N libircclient.h PATHS /usr/include/libircclient)
  find_path(IRC_H_S libircclient.h PATHS /usr/include)
  if(IRC_H_N)
    include_directories(${IRC_H_N})
  endif(IRC_H_N)
  if(IRC_H_N OR IRC_H_S)
    set(IRC_H_ true)
  else()
    message(FATAL_ERROR "Unable to find libircclient")
  endif(IRC_H_N OR IRC_H_S)
  set(conky_libs ${conky_libs} -lircclient)
endif(BUILD_IRC)

if(BUILD_IPV6)
  find_file(IF_INET6 if_inet6 PATHS /proc/net)
  if(NOT IF_INET6)
    message(WARNING "/proc/net/if_inet6 unavailable")
  endif(NOT IF_INET6)
endif(BUILD_IPV6)

if(BUILD_HTTP)
  find_file(HTTP_H_ microhttpd.h)
  #I'm not using check_include_files because microhttpd.h seems to need a lot of different headers and i'm not sure which...
  if(NOT HTTP_H_)
    message(FATAL_ERROR "Unable to find libmicrohttpd")
  endif(NOT HTTP_H_)
  set(conky_libs ${conky_libs} -lmicrohttpd)
endif(BUILD_HTTP)

if(BUILD_NCURSES)
  include(FindCurses)
  if(NOT CURSES_FOUND)
    message(FATAL_ERROR "Unable to find ncurses library")
  endif(NOT CURSES_FOUND)
  set(conky_libs ${conky_libs} ${CURSES_LIBRARIES})
  set(conky_includes ${conky_includes} ${CURSES_INCLUDE_DIR})
endif(BUILD_NCURSES)

if(BUILD_MYSQL)
  find_path(mysql_INCLUDE_PATH mysql.h ${INCLUDE_SEARCH_PATH} /usr/include/mysql /usr/local/include/mysql)
  if(NOT mysql_INCLUDE_PATH)
    message(FATAL_ERROR "Unable to find mysql.h")
  endif(NOT mysql_INCLUDE_PATH)
  set(conky_includes ${conky_includes} ${mysql_INCLUDE_PATH})
  find_library(MYSQLCLIENT_LIB NAMES mysqlclient)
  if(NOT MYSQLCLIENT_LIB)
    message(FATAL_ERROR "Unable to find mysqlclient library")
  endif(NOT MYSQLCLIENT_LIB)
  set(conky_libs ${conky_libs} ${MYSQLCLIENT_LIB})
endif(BUILD_MYSQL)

if(BUILD_WLAN)
  set(CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
  check_include_files(iwlib.h IWLIB_H)
  if(NOT IWLIB_H)
    message(FATAL_ERROR "Unable to find iwlib.h")
  endif(NOT IWLIB_H)
  find_library(IWLIB_LIB NAMES iw)
  if(NOT IWLIB_LIB)
    message(FATAL_ERROR "Unable to find libiw.so")
  endif(NOT IWLIB_LIB)
  set(conky_libs ${conky_libs} ${IWLIB_LIB})
  check_function_exists(iw_sockets_open IWLIB_SOCKETS_OPEN_FUNC)
endif(BUILD_WLAN)

if(BUILD_PORT_MONITORS)
  check_function_exists(getnameinfo HAVE_GETNAMEINFO)
  if(NOT HAVE_GETNAMEINFO)
    message(FATAL_ERROR "could not find getnameinfo()")
  endif(NOT HAVE_GETNAMEINFO)
  check_include_files("netdb.h;netinet/in.h;netinet/tcp.h;sys/socket.h;arpa/inet.h" HAVE_PORTMON_HEADERS)
  if(NOT HAVE_PORTMON_HEADERS)
    message(FATAL_ERROR "missing needed network header(s) for port monitoring")
  endif(NOT HAVE_PORTMON_HEADERS)
endif(BUILD_PORT_MONITORS)


# Check for iconv
if(BUILD_ICONV)
  check_include_files(iconv.h HAVE_ICONV_H)
  find_library(ICONV_LIBRARY NAMES iconv)
  if(NOT ICONV_LIBRARY)
    # maybe iconv() is provided by libc
    set(ICONV_LIBRARY "" CACHE FILEPATH "Path to the iconv library, if iconv is not provided by libc" FORCE)
  endif(NOT ICONV_LIBRARY)
  set(CMAKE_REQUIRED_LIBRARIES ${ICONV_LIBRARY})
  check_function_exists(iconv ICONV_FUNC)
  if(HAVE_ICONV_H AND ICONV_FUNC)
    set(conky_includes ${conky_includes} ${ICONV_INCLUDE_DIR})
    set(conky_libs ${conky_libs} ${ICONV_LIBRARY})
  else(HAVE_ICONV_H AND ICONV_FUNC)
    message(FATAL_ERROR "Unable to find iconv library")
  endif(HAVE_ICONV_H AND ICONV_FUNC)
endif(BUILD_ICONV)


# check for Xlib
if(BUILD_X11)
  include(FindX11)
  find_package(X11)
  if(X11_FOUND)
    set(conky_includes ${conky_includes} ${X11_INCLUDE_DIR})
    set(conky_libs ${conky_libs} ${X11_LIBRARIES})

    # check for Xdamage
    if(BUILD_XDAMAGE)
      if(NOT X11_Xdamage_FOUND)
        message(FATAL_ERROR "Unable to find Xdamage library")
      endif(NOT X11_Xdamage_FOUND)
      if(NOT X11_Xfixes_FOUND)
        message(FATAL_ERROR "Unable to find Xfixes library")
      endif(NOT X11_Xfixes_FOUND)
      set(conky_libs ${conky_libs} ${X11_Xdamage_LIB} ${X11_Xfixes_LIB})
    endif(BUILD_XDAMAGE)

    if(BUILD_XSHAPE)
      if(NOT X11_Xshape_FOUND)
        message(FATAL_ERROR "Unable to find Xshape library")
      endif(NOT X11_Xshape_FOUND)
      set(conky_libs ${conky_libs} ${X11_Xshape_LIB} )
    endif(BUILD_XSHAPE)

    # check for Xft
    if(BUILD_XFT)
      find_path(freetype_INCLUDE_PATH config/ftconfig.h ${INCLUDE_SEARCH_PATH}
        /usr/include/freetype2
        /usr/local/include/freetype2
        /usr/pkg/include/freetype2)
      if(freetype_INCLUDE_PATH)
        set(freetype_FOUND true)
        set(conky_includes ${conky_includes} ${freetype_INCLUDE_PATH})
      else(freetype_INCLUDE_PATH)
        find_path(freetype_INCLUDE_PATH freetype/config/ftconfig.h ${INCLUDE_SEARCH_PATH}
          /usr/include/freetype2
          /usr/local/include/freetype2
          /usr/pkg/include/freetype2)
        if(freetype_INCLUDE_PATH)
          set(freetype_FOUND true)
          set(conky_includes ${conky_includes} ${freetype_INCLUDE_PATH})
        else(freetype_INCLUDE_PATH)
          message(FATAL_ERROR "Unable to find freetype library")
        endif(freetype_INCLUDE_PATH)
      endif(freetype_INCLUDE_PATH)
      if(NOT X11_Xft_FOUND)
        message(FATAL_ERROR "Unable to find Xft library")
      endif(NOT X11_Xft_FOUND)
      set(conky_libs ${conky_libs} ${X11_Xft_LIB})
    endif(BUILD_XFT)

    # check for Xdbe
    if(BUILD_XDBE)
      if(NOT X11_Xext_FOUND)
        message(FATAL_ERROR "Unable to find Xext library (needed for Xdbe)")
      endif(NOT X11_Xext_FOUND)
      set(conky_libs ${conky_libs} ${X11_Xext_LIB})
    endif(BUILD_XDBE)
  else(X11_FOUND)
    message(FATAL_ERROR "Unable to find X11 library")
  endif(X11_FOUND)
endif(BUILD_X11)

# Check whether we want Lua bindings
if(BUILD_LUA_CAIRO OR BUILD_LUA_IMLIB2 OR BUILD_LUA_RSVG)
  set(WANT_TOLUA true)
endif(BUILD_LUA_CAIRO OR BUILD_LUA_IMLIB2 OR BUILD_LUA_RSVG)

# Check for Lua itself
if(WANT_TOLUA)
  # If we need tolua++, we must compile against Lua 5.1
  pkg_search_module(LUA REQUIRED lua5.1 lua-5.1 lua51 lua)
  if(NOT LUA_VERSION VERSION_LESS 5.2.0)
    message(FATAL_ERROR "Unable to find Lua 5.1.x")
  endif(NOT LUA_VERSION VERSION_LESS 5.2.0)
else(WANT_TOLUA)
  # Otherwise, use the most recent Lua version
  pkg_search_module(LUA REQUIRED lua>=5.3 lua5.3 lua-5.3 lua53 lua5.2 lua-5.2 lua52 lua5.1 lua-5.1 lua51 lua>=5.1)
endif(WANT_TOLUA)
set(conky_libs ${conky_libs} ${LUA_LIBRARIES})
set(conky_includes ${conky_includes} ${LUA_INCLUDE_DIRS})
link_directories(${LUA_LIBRARY_DIRS})

# Check for libraries used by Lua bindings
if(BUILD_LUA_CAIRO)
  pkg_check_modules(CAIRO REQUIRED cairo cairo-xlib)
  set(luacairo_libs ${CAIRO_LIBRARIES} ${LUA_LIBRARIES})
  set(luacairo_includes ${CAIRO_INCLUDE_DIRS} ${LUA_INCLUDE_DIRS})
  find_program(APP_PATCH patch)
  if(NOT APP_PATCH)
    message(FATAL_ERROR "Unable to find program 'patch'")
  endif(NOT APP_PATCH)
endif(BUILD_LUA_CAIRO)
if(BUILD_LUA_IMLIB2)
  pkg_search_module(IMLIB2 REQUIRED imlib2 Imlib2)
  set(luaimlib2_libs ${IMLIB2_LIB} ${LUA_LIBRARIES})
  set(luaimlib2_includes ${IMLIB2_INCLUDE_PATH} ${LUA_INCLUDE_DIRS})
endif(BUILD_LUA_IMLIB2)
if(BUILD_LUA_RSVG)
  pkg_check_modules(RSVG REQUIRED librsvg-2.0)
  set(luarsvg_libs ${RSVG_LIBRARIES} ${LUA_LIBRARIES})
  set(luarsvg_includes ${RSVG_INCLUDE_DIRS} ${LUA_INCLUDE_DIRS})
endif(BUILD_LUA_RSVG)

if(BUILD_AUDACIOUS)
  set(WANT_GLIB true)
  pkg_check_modules(NEW_AUDACIOUS audacious>=1.4.0)
  if(NEW_AUDACIOUS_FOUND)
    pkg_check_modules(AUDACIOUS REQUIRED audclient>=1.4.0)
    pkg_check_modules(DBUS_GLIB REQUIRED dbus-glib-1)
  else(NEW_AUDACIOUS_FOUND)
    pkg_check_modules(AUDACIOUS REQUIRED audacious<1.4.0)
  endif(NEW_AUDACIOUS_FOUND)
  set(conky_libs ${conky_libs} ${AUDACIOUS_LIBRARIES} ${DBUS_GLIB_LIBRARIES})
  set(conky_includes ${conky_includes} ${AUDACIOUS_INCLUDE_DIRS} ${DBUS_GLIB_INCLUDE_DIRS})
endif(BUILD_AUDACIOUS)

if(BUILD_BMPX)
  pkg_check_modules(BMPX REQUIRED bmp-2.0>=0.14.0)
  set(conky_libs ${conky_libs} ${BMPX_LIBRARIES})
  set(conky_includes ${conky_includes} ${BMPX_INCLUDE_DIRS})
endif(BUILD_BMPX)

if(BUILD_XMMS2)
  pkg_check_modules(XMMS2 REQUIRED xmms2-client>=0.6)
  set(conky_libs ${conky_libs} ${XMMS2_LIBRARIES})
  set(conky_includes ${conky_includes} ${XMMS2_INCLUDE_DIRS})
endif(BUILD_XMMS2)

if(BUILD_EVE)
  set(WANT_CURL true)
  set(WANT_LIBXML2 true)
endif(BUILD_EVE)

if(BUILD_CURL)
  set(WANT_CURL true)
endif(BUILD_CURL)

if(BUILD_RSS)
  set(WANT_CURL true)
  set(WANT_LIBXML2 true)
endif(BUILD_RSS)

if(BUILD_WEATHER_METAR)
  set(WANT_CURL true)
  set(BUILD_WEATHER true)
endif(BUILD_WEATHER_METAR)

if(BUILD_WEATHER_XOAP)
  set(WANT_LIBXML2 true)
  set(WANT_CURL true)
  set(BUILD_XOAP true)
  set(BUILD_WEATHER true)
endif(BUILD_WEATHER_XOAP)

if(BUILD_NVIDIA)
  find_path(XNVCtrl_INCLUDE_PATH NVCtrl/NVCtrl.h ${INCLUDE_SEARCH_PATH})
  find_library(XNVCtrl_LIB NAMES XNVCtrl)
  if(XNVCtrl_INCLUDE_PATH AND XNVCtrl_LIB)
    set(XNVCtrl_FOUND true)
    set(conky_libs ${conky_libs} ${XNVCtrl_LIB})
    set(conky_includes ${conky_includes} ${XNVCtrl_INCLUDE_PATH})
  else(XNVCtrl_INCLUDE_PATH AND XNVCtrl_LIB)
    message(FATAL_ERROR "Unable to find XNVCtrl library")
  endif(XNVCtrl_INCLUDE_PATH AND XNVCtrl_LIB)
endif(BUILD_NVIDIA)

if(BUILD_IMLIB2)
  pkg_search_module(IMLIB2 REQUIRED imlib2 Imlib2)
  set(conky_libs ${conky_libs} ${IMLIB2_LIB} ${IMLIB2_LDFLAGS})
  set(conky_includes ${conky_includes} ${IMLIB2_INCLUDE_PATH})
endif(BUILD_IMLIB2)

if(BUILD_JOURNAL)
  pkg_search_module(SYSTEMD REQUIRED libsystemd libsystemd-journal)
  set(conky_libs ${conky_libs} ${SYSTEMD_LIB} ${SYSTEMD_LDFLAGS})
  set(conky_includes ${conky_includes} ${SYSTEMD_INCLUDE_PATH})
endif(BUILD_JOURNAL)

if(BUILD_PULSEAUDIO)
  pkg_check_modules(PULSEAUDIO REQUIRED libpulse)
  set(conky_libs ${conky_libs} ${PULSEAUDIO_LIBRARIES})
  set(conky_includes ${conky_includes} ${PULSEAUDIO_INCLUDE_DIRS})
endif(BUILD_PULSEAUDIO)

# Common libraries
if(WANT_GLIB)
  pkg_check_modules(GLIB REQUIRED glib-2.0)
  set(conky_libs ${conky_libs} ${GLIB_LIBRARIES})
  set(conky_includes ${conky_includes} ${GLIB_INCLUDE_DIRS})
endif(WANT_GLIB)

if(WANT_CURL)
  pkg_check_modules(CURL REQUIRED libcurl)
  set(conky_libs ${conky_libs} ${CURL_LIBRARIES})
  set(conky_includes ${conky_includes} ${CURL_INCLUDE_DIRS})
endif(WANT_CURL)

if(WANT_LIBXML2)
  pkg_check_modules(LIBXML2 REQUIRED libxml-2.0)
  set(conky_libs ${conky_libs} ${LIBXML2_LIBRARIES})
  set(conky_includes ${conky_includes} ${LIBXML2_INCLUDE_DIRS})
endif(WANT_LIBXML2)

if(WANT_TOLUA)
  find_program(APP_TOLUA NAMES toluapp tolua++ tolua++5.1 tolua++-5.1)
  if(NOT APP_TOLUA)
    message(FATAL_ERROR "Unable to find program 'tolua++'")
  endif(NOT APP_TOLUA)
  find_library(TOLUA_LIBS NAMES toluapp tolua++ tolua++5.1 tolua++-5.1)
  find_path(TOLUA_INCLUDE_PATH tolua++.h ${INCLUDE_SEARCH_PATH})
  if(TOLUA_INCLUDE_PATH AND TOLUA_LIBS)
    set(TOLUA_FOUND true)
  else(TOLUA_INCLUDE_PATH AND TOLUA_LIBS)
    message(FATAL_ERROR "Unable to find tolua++ library")
  endif(TOLUA_INCLUDE_PATH AND TOLUA_LIBS)
  mark_as_advanced(APP_TOLUA TOLUA_INCLUDE_PATH TOLUA_LIBS)
  set(conky_includes ${conky_includes} ${TOLUA_INCLUDE_PATH})
  set(conky_libs ${conky_libs} ${TOLUA_LIBS})
  set(LUA_EXTRAS true)
endif(WANT_TOLUA)

# Look for doc generation programs
if(MAINTAINER_MODE)
  # Used for doc generation
  find_program(APP_DB2X_XSLTPROC db2x_xsltproc)
  if(NOT APP_DB2X_XSLTPROC)
    message(FATAL_ERROR "Unable to find program 'db2x_xsltproc'")
  endif(NOT APP_DB2X_XSLTPROC)
  find_program(APP_DB2X_MANXML db2x_manxml)
  if(NOT APP_DB2X_MANXML)
    message(FATAL_ERROR "Unable to find program 'db2x_manxml'")
  endif(NOT APP_DB2X_MANXML)
  find_program(APP_XSLTPROC xsltproc)
  if(NOT APP_XSLTPROC)
    message(FATAL_ERROR "Unable to find program 'xsltproc'")
  endif(NOT APP_XSLTPROC)
  find_program(APP_MAN man)
  if(NOT APP_MAN)
    message(FATAL_ERROR "Unable to find program 'man'")
  endif(NOT APP_MAN)
  find_program(APP_LESS less)
  if(NOT APP_LESS)
    message(FATAL_ERROR "Unable to find program 'less'")
  endif(NOT APP_LESS)
  find_program(APP_SED sed)
  if(NOT APP_SED)
    message(FATAL_ERROR "Unable to find program 'sed'")
  endif(NOT APP_SED)
  mark_as_advanced(APP_DB2X_XSLTPROC APP_DB2X_MANXML APP_XSLTPROC APP_MAN APP_SED APP_LESS)
endif(MAINTAINER_MODE)

if(CMAKE_BUILD_TYPE MATCHES "Debug")
  set(DEBUG true)
endif(CMAKE_BUILD_TYPE MATCHES "Debug")

# The version numbers are simply derived from the date and number of commits
# since start of month
if(DEBUG)
  execute_process(COMMAND
    ${APP_GIT} --git-dir=${CMAKE_CURRENT_SOURCE_DIR}/.git log
    --since=${VERSION_MAJOR}-${VERSION_MINOR}-01 --pretty=oneline COMMAND
    ${APP_WC} -l COMMAND ${APP_AWK} "{print $1}" RESULT_VARIABLE RETVAL
    OUTPUT_VARIABLE COMMIT_COUNT OUTPUT_STRIP_TRAILING_WHITESPACE)
endif(DEBUG)