dnl Process this file with autoconf to produce a configure script.

dnl Prolog

AC_INIT(NX.h)
AC_PREREQ(2.13)

dnl Set our default compilation flags.

CXXFLAGS="$CXXFLAGS -O3 -fno-rtti -fno-exceptions"
CFLAGS="$CFLAGS -O3"

dnl Reset default linking directives.

LIBSTATIC=""
LIBSHARED=""

dnl Prefer headers and libraries from nx-X11, if present.

if test -d "../nx-X11/include" ; then
    CXXFLAGS="$CXXFLAGS -I../nx-X11/exports/include"
    CFLAGS="$CFLAGS -I../nx-X11/exports/include"
    LIBS="$LIBS -L../nx-X11/exports/lib"
fi

dnl Check whether --with-ipaq was given.

if test "${with_ipaq}" = yes; then
  echo -e "enabling IPAQ configuration"
  CXX="arm-linux-c++"
  CC="arm-linux-gcc"
  unset ac_cv_prog_armcxx
  unset ac_cv_prog_armcc
  unset ac_cv_prog_CXXCPP
  AC_CHECK_PROG([armcxx],["$CXX"],[yes],[no],[$PATH])
  AC_CHECK_PROG([armcc],["$CC"],[yes],[no],[$PATH])
  if test $armcxx = "yes" && test $armcc = "yes" ; then
    ac_cv_prog_CXX="$CXX"
    ac_cv_prog_CC="$CC"
  else
    AC_MSG_ERROR(Installation or configuration problem. Cannot find compiler for arm-linux.)
  fi
else
  unset ac_cv_prog_CXX
  unset ac_cv_prog_CC
  unset ac_cv_prog_CXXCPP
fi  

dnl Check for programs.

AC_PROG_CXX
AC_PROG_CC
AC_LANG_CPLUSPLUS

dnl Check whether option -Wno-deprecated
dnl is needed by GCC compiler.

AC_MSG_CHECKING([whether compiler needs -Wno-deprecated])
gcc_version=`${CC} --version | grep 'gcc (GCC) [[3-4]].' | head -n 1`
case "${gcc_version}" in
     gcc*)
        AC_MSG_RESULT([yes])
        CXXFLAGS="$CXXFLAGS -Wno-deprecated"
        ;;

     *)
        AC_MSG_RESULT([no])
        ;;
esac

AC_MSG_CHECKING([whether compiler accepts -Wmissing-declarations])
gcc_version=`${CC} --version | grep 'gcc (GCC) [[3-4]].' | head -n 1`
case "${gcc_version}" in
     gcc*)
        AC_MSG_RESULT([no])
        ;;

     *)
        AC_MSG_RESULT([yes])
        CXXFLAGS="$CXXFLAGS -Wmissing-declarations"
        ;;
esac

dnl Check for BSD compatible install.

AC_PROG_INSTALL

dnl Check for extra header files.

AC_PATH_XTRA

dnl Custom addition.

ac_help="$ac_help
  --with-symbols          add the -g flag to produce the debug symbols
  --with-use-malloc       add the __USE_MALLOC flag to avoid the STL allocators
  --with-info             define INFO at compile time to get basic log output
  --with-valgrind         clean up allocated buffers to avoid valgrind warnings
  --with-version          use this version for produced libraries

  --with-static-png       enable static linking of PNG library
  --with-static-jpeg      enable static linking of JPEG library
  --with-static-z         enable static linking of Z library"

dnl Check to see if we're running under Cygwin32.

AC_DEFUN(nxconf_CYGWIN32,
[AC_CACHE_CHECK(for Cygwin32 environment, nxconf_cv_cygwin32,
[AC_TRY_COMPILE(,[return __CYGWIN32__;],
nxconf_cv_cygwin32=yes, nxconf_cv_cygwin32=no)
rm -f conftest*])
CYGWIN32=
test "$nxconf_cv_cygwin32" = yes && CYGWIN32=yes])
nxconf_CYGWIN32

dnl Check whether we're building on a AMD64.

AC_DEFUN(nxconf_AMD64,
[AC_CACHE_CHECK(for Amd64 environment, nxconf_cv_amd64,
[AC_TRY_COMPILE(,[return (__amd64__ || __x86_64__);],
nxconf_cv_amd64=yes, nxconf_cv_amd64=no)
rm -f conftest*])
AMD64=
test "$nxconf_cv_amd64" = yes && AMD64=yes])
nxconf_AMD64

dnl Check for Darwin environment.

AC_DEFUN(nxconf_DARWIN,
[AC_CACHE_CHECK(for Darwin environment, nxconf_cv_darwin,
[AC_TRY_COMPILE(,[return __APPLE__;],
nxconf_cv_darwin=yes, nxconf_cv_darwin=no)
rm -f conftest*])
DARWIN=
test "$nxconf_cv_darwin" = yes && DARWIN=yes])
nxconf_DARWIN

dnl Check to see if we're running under Solaris.

AC_DEFUN(nxconf_SUN,
[AC_CACHE_CHECK(for Solaris environment, nxconf_cv_sun,
[AC_TRY_COMPILE(,[return __sun;],
nxconf_cv_sun=yes, nxconf_cv_sun=no)
rm -f conftest*])
SUN=
test "$nxconf_cv_sun" = yes && SUN=yes])
nxconf_SUN

dnl Check to see if we're running under FreeBSD.

AC_DEFUN(nxconf_FreeBSD,
[AC_CACHE_CHECK(for FreeBSD environment, nxconf_cv_freebsd,
[AC_TRY_COMPILE(,[return __FreeBSD__;],
nxconf_cv_freebsd=yes, nxconf_cv_freebsd=no)
rm -f conftest*])
FreeBSD=
test "$nxconf_cv_freebsd" = yes && FreeBSD=yes])
nxconf_FreeBSD

dnl Build PIC libraries.

if test "$CYGWIN32" != yes -a "$DARWIN" != yes; then
  CXXFLAGS="$CXXFLAGS -fPIC"
  CFLAGS="$CFLAGS -fPIC"
fi

dnl Solaris requires the socket and gcc_s libs explicitly linked.
dnl Note also that headers from default /usr/openwin/include/X11
dnl cause a warning due to pragma in Xmd.h.

if test "$SUN" = yes; then
  LIBS="$LIBS -L/usr/sfw/lib -lsocket "
  CXXFLAGS="$CXXFLAGS -I/usr/sfw/include"
  CFLAGS="$CFLAGS -I/usr/sfw/include"
fi

dnl On FreeBSD search libraries and includes under /usr/local.

if test "$FreeBSD" = yes; then
  LIBS="$LIBS -L/usr/local/lib"
  CXXFLAGS="$CXXFLAGS -I/usr/local/include"
  CFLAGS="$CFLAGS -I/usr/local/include"
fi

dnl Under Darwin we don't have support for -soname option and
dnl we need the -bundle flag. Under Solaris, instead, we need
dnl the options -G -h.

if test "$DARWIN" = yes; then
  LDFLAGS="$LDFLAGS -bundle"
elif test "$SUN" = yes; then
  LDFLAGS="$LDFLAGS -G -h \$(LIBLOAD)"
else
  LDFLAGS="$LDFLAGS -Wl,-soname,\$(LIBLOAD)"
fi

dnl Check to see if in_addr_t is defined.
dnl Could use a specific configure test.

AC_DEFUN(nxconf_INADDRT,
[AC_CACHE_CHECK(for in_addr_t, nxconf_cv_inaddrt,
[AC_TRY_COMPILE([#include <netinet/in.h>],[in_addr_t t; t = 1; return t;],
nxconf_cv_inaddrt=yes, nxconf_cv_inaddrt=no)
rm -f conftest*])
INADDRT=
test "$nxconf_cv_inaddrt" = yes && INADDRT=yes])
nxconf_INADDRT

dnl If in_addr_t is not defined use unsigned int.

if test "$INADDRT" != yes ; then
  echo -e "using unsigned int for type in_addr_t"
  CXXFLAGS="$CXXFLAGS -DIN_ADDR_T=unsigned"
  CFLAGS="$CFLAGS -DIN_ADDR_T=unsigned"
else
  CXXFLAGS="$CXXFLAGS -DIN_ADDR_T=in_addr_t"
  CFLAGS="$CFLAGS -DIN_ADDR_T=in_addr_t"
fi

dnl Check whether --with-version was given.

AC_SUBST(LIBVERSION)
AC_SUBST(VERSION)
if test "${with_version}" = yes; then
  VERSION=${ac_option}
else
  VERSION=`cat VERSION`
fi
echo -e "compiling version ${VERSION}"

LIBVERSION=`echo ${VERSION} | cut -d '.' -f 1`

CXXFLAGS="$CXXFLAGS -DVERSION=\\\"${VERSION}\\\""
CFLAGS="$CFLAGS -DVERSION=\\\"${VERSION}\\\""

dnl Check whether --with-static-png was given and
dnl add -lpng or libpng.a to linking.

if test "${with_static_png}" = yes; then
  echo -e "enabling static linking of PNG library"
  if test "$SUN" = yes && test -f "/usr/sfw/lib/libpng.a"; then
    LIBSTATIC="$LIBSTATIC /usr/sfw/lib/libpng.a"
  else
    if test -f "/usr/lib/libpng.a" ; then
      LIBSTATIC="$LIBSTATIC /usr/lib/libpng.a"
    else
      if test -f "/usr/local/lib/libpng.a" ; then
        echo -e "assuming libpng.a in /usr/local/lib"
        LIBSTATIC="$LIBSTATIC /usr/local/lib/libpng.a"
      else
        echo -e "Warning: assuming libpng.a in the local path"
        LIBSTATIC="$LIBSTATIC libpng.a"
      fi
    fi
  fi
else
  echo -e "enabling dynamic linking of PNG library"
  LIBSHARED="$LIBSHARED -lpng"
fi

dnl Check whether --with-static-jpeg was given and
dnl add -ljpeg or libjpeg.a to linking.

if test "${with_static_jpeg}" = yes; then
  echo -e "enabling static linking of JPEG library"
  if test "$SUN" = yes && test -f "/usr/sfw/lib/libjpeg.a"; then
    LIBSTATIC="$LIBSTATIC /usr/sfw/lib/libjpeg.a"
  else
    if test -f "/usr/lib/libjpeg.a" ; then
      LIBSTATIC="$LIBSTATIC /usr/lib/libjpeg.a"
    else
      if test -f "/usr/local/lib/libjpeg.a" ; then
        echo -e "assuming libjpeg.a in /usr/local/lib"
        LIBSTATIC="$LIBSTATIC /usr/local/lib/libjpeg.a"
      else
        echo -e "Warning: assuming libjpeg.a in the local path"
        LIBSTATIC="$LIBSTATIC libjpeg.a"
      fi
    fi
  fi
else
  echo -e "enabling dynamic linking of JPEG library"
  LIBSHARED="$LIBSHARED -ljpeg"
fi

dnl Check whether --with-static-z was given and
dnl add -lz or libz.a to linking.

if test "${with_static_z}" = yes; then
  echo -e "enabling static linking of Z library"
  if test "$SUN" = yes && test -f "/usr/sfw/lib/libz.a"; then
    LIBSTATIC="$LIBSTATIC /usr/sfw/lib/libz.a"
  else
    if test -f "/usr/lib/libz.a" ; then
      LIBSTATIC="$LIBSTATIC /usr/lib/libz.a"
    else
      if test -f "/usr/local/lib/libz.a" ; then
        echo -e "assuming libz.a in /usr/local/lib"
        LIBSTATIC="$LIBSTATIC /usr/local/lib/libz.a"
      else
        echo -e "Warning: assuming libz.a in the local path"
        LIBSTATIC="$LIBSTATIC libz.a"
      fi
    fi
  fi
else
  echo -e "enabling dynamic linking of Z library"
  LIBSHARED="$LIBSHARED -lz"
fi

dnl Finally compose the LIB variable.

if test "$DARWIN" = yes ; then
  LIBS="$LIBS $LIBSTATIC $LIBSHARED"
elif test "$SUN" = yes ; then
  LIBS="$LIBS $LIBSTATIC $LIBSHARED"
else
  LIBS="$LIBS $LIBSTATIC -shared $LIBSHARED"
fi

dnl Check whether --with-symbols or --without-symbols was
dnl given and set the required optimization level.

if test "${with_symbols}" = yes; then
  echo -e "enabling production of debug symbols"
  CXXFLAGS="-g $CXXFLAGS"
  CFLAGS="-g $CFLAGS"
else
  echo -e "disabling production of debug symbols"
fi

dnl Check whether --with-use-malloc or --without-use-malloc
dnl was given.

if test "${with_use_malloc}" = yes; then
  echo -e "disabling use of the STL allocators"
  CXXFLAGS="$CXXFLAGS -D__USE_MALLOC"
else
  echo -e "enabling use of the STL allocators"
fi

dnl Check whether --with-info or --without-info was given.

if test "${with_info}" = yes; then
  echo -e "enabling info output in the log file"
  CXXFLAGS="$CXXFLAGS -DINFO"
  CFLAGS="$CFLAGS -DINFO"
else
  echo -e "disabling info output in the log file"
fi

dnl Check whether --with-valgrind or --without-valgrind was given.

if test "${with_valgrind}" = yes; then
  echo -e "enabling valgrind memory checker workarounds"
  CXXFLAGS="$CXXFLAGS -DVALGRIND"
  CFLAGS="$CFLAGS -DVALGRIND"
else
  echo -e "disabling valgrind memory checker workarounds"
fi

dnl Find makedepend somewhere.

AC_SUBST(MAKEDEPEND)

if test -x "../nx-X11/config/makedepend/makedepend" ; then
  MAKEDEPEND=../nx-X11/config/makedepend/makedepend
else
  if test -x "/usr/X11R6/bin/makedepend" ; then
    MAKEDEPEND=/usr/X11R6/bin/makedepend
  else
    if test -x "/usr/openwin/bin/makedepend" ; then
      MAKEDEPEND=/usr/openwin/bin/makedepend
    else
      MAKEDEPEND=/usr/bin/makedepend
    fi
  fi
fi

dnl Determine what to build based on the platform.
dnl Override the LIBS settings on Cygwin32 so that
dnl we always link with the exact set of libraries.

AC_SUBST(ALL)

if test "$CYGWIN32" = yes; then
    ALL="\$(LIBCYGARCHIVE) \$(LIBCYGSHARED) \$(LIBARCHIVE)"
    LIBS="-lstdc++ -lpng -ljpeg -lz"
else
    ALL="\$(LIBFULL) \$(LIBLOAD) \$(LIBSHARED) \$(LIBARCHIVE)"
fi

AC_OUTPUT(Makefile)