dnl @synopsis ACX_BLAS([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
dnl
dnl This macro looks for a library that implements the BLAS
dnl linear-algebra interface (see http://www.netlib.org/blas/). On
dnl success, it sets the BLAS_LIBS output variable to hold the
dnl requisite library linkages.
dnl
dnl To link with BLAS, you should link with:
dnl
dnl 	$BLAS_LIBS $LIBS $FLIBS
dnl
dnl in that order. FLIBS is the output variable of the
dnl AC_F77_LIBRARY_LDFLAGS macro (called if necessary by ACX_BLAS), and
dnl is sometimes necessary in order to link with F77 libraries. Users
dnl will also need to use AC_F77_DUMMY_MAIN (see the autoconf manual),
dnl for the same reason.
dnl
dnl Many libraries are searched for, from ATLAS to CXML to ESSL. The
dnl user may also use --with-blas=<lib> in order to use some specific
dnl BLAS library <lib>. In order to link successfully, however, be
dnl aware that you will probably need to use the same Fortran compiler
dnl (which can be set via the F77 env. var.) as was used to compile the
dnl BLAS library.
dnl
dnl ACTION-IF-FOUND is a list of shell commands to run if a BLAS
dnl library is found, and ACTION-IF-NOT-FOUND is a list of commands to
dnl run it if it is not found. If ACTION-IF-FOUND is not specified, the
dnl default action will define HAVE_BLAS.
dnl
dnl This macro requires autoconf 2.50 or later.
dnl
dnl @category InstalledPackages
dnl @author Steven G. Johnson <stevenj@alum.mit.edu>
dnl @version 2001-12-13
dnl @license GPLWithACException

AC_DEFUN([ACX_BLAS], [
AC_PREREQ(2.50)
AC_REQUIRE([AC_F77_LIBRARY_LDFLAGS])
acx_blas_ok=no

AC_ARG_WITH(blas,
	[AC_HELP_STRING([--with-blas=<lib>], [use BLAS library <lib>])])
case $with_blas in
	yes | "") ;;
	no) acx_blas_ok=disable ;;
	-* | */* | *.a | *.so | *.so.* | *.o) BLAS_LIBS="$with_blas" ;;
	*) BLAS_LIBS="-l$with_blas" ;;
esac

# Get fortran linker names of BLAS functions to check for.
AC_F77_FUNC(sgemm)
AC_F77_FUNC(dgemm)

acx_blas_save_LIBS="$LIBS"
LIBS="$LIBS $FLIBS"

# First, check BLAS_LIBS environment variable
if test $acx_blas_ok = no; then
if test "x$BLAS_LIBS" != x; then
	save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS"
	AC_MSG_CHECKING([for $sgemm in $BLAS_LIBS])
	AC_TRY_LINK_FUNC($sgemm, [acx_blas_ok=yes], [BLAS_LIBS=""])
	AC_MSG_RESULT($acx_blas_ok)
	LIBS="$save_LIBS"
fi
fi

# BLAS linked to by default?  (happens on some supercomputers)
if test $acx_blas_ok = no; then
	save_LIBS="$LIBS"; LIBS="$LIBS"
	AC_CHECK_FUNC($sgemm, [acx_blas_ok=yes])
	LIBS="$save_LIBS"
fi

# BLAS in ATLAS library? (http://math-atlas.sourceforge.net/)
if test $acx_blas_ok = no; then
	AC_CHECK_LIB(atlas, ATL_xerbla,
		[AC_CHECK_LIB(f77blas, $sgemm,
		[AC_CHECK_LIB(cblas, cblas_dgemm,
			[acx_blas_ok=yes
			 BLAS_LIBS="-lcblas -lf77blas -latlas"],
			[], [-lf77blas -latlas])],
			[], [-latlas])])
fi

# BLAS in PhiPACK libraries? (requires generic BLAS lib, too)
if test $acx_blas_ok = no; then
	AC_CHECK_LIB(blas, $sgemm,
		[AC_CHECK_LIB(dgemm, $dgemm,
		[AC_CHECK_LIB(sgemm, $sgemm,
			[acx_blas_ok=yes; BLAS_LIBS="-lsgemm -ldgemm -lblas"],
			[], [-lblas])],
			[], [-lblas])])
fi

# BLAS in Alpha CXML library?
if test $acx_blas_ok = no; then
	AC_CHECK_LIB(cxml, $sgemm, [acx_blas_ok=yes;BLAS_LIBS="-lcxml"])
fi

# BLAS in Alpha DXML library? (now called CXML, see above)
if test $acx_blas_ok = no; then
	AC_CHECK_LIB(dxml, $sgemm, [acx_blas_ok=yes;BLAS_LIBS="-ldxml"])
fi

# BLAS in Sun Performance library?
if test $acx_blas_ok = no; then
	if test "x$GCC" != xyes; then # only works with Sun CC
		AC_CHECK_LIB(sunmath, acosp,
			[AC_CHECK_LIB(sunperf, $sgemm,
        			[BLAS_LIBS="-xlic_lib=sunperf -lsunmath"
                                 acx_blas_ok=yes],[],[-lsunmath])])
	fi
fi

# BLAS in SCSL library?  (SGI/Cray Scientific Library)
if test $acx_blas_ok = no; then
	AC_CHECK_LIB(scs, $sgemm, [acx_blas_ok=yes; BLAS_LIBS="-lscs"])
fi

# BLAS in SGIMATH library?
if test $acx_blas_ok = no; then
	AC_CHECK_LIB(complib.sgimath, $sgemm,
		     [acx_blas_ok=yes; BLAS_LIBS="-lcomplib.sgimath"])
fi

# BLAS in IBM ESSL library? (requires generic BLAS lib, too)
if test $acx_blas_ok = no; then
	AC_CHECK_LIB(blas, $sgemm,
		[AC_CHECK_LIB(essl, $sgemm,
			[acx_blas_ok=yes; BLAS_LIBS="-lessl -lblas"],
			[], [-lblas $FLIBS])])
fi

# Generic BLAS library?
if test $acx_blas_ok = no; then
	AC_CHECK_LIB(blas, $sgemm, [acx_blas_ok=yes; BLAS_LIBS="-lblas"])
fi

AC_SUBST(BLAS_LIBS)

LIBS="$acx_blas_save_LIBS"

# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
if test x"$acx_blas_ok" = xyes; then
        ifelse([$1],,AC_DEFINE(HAVE_BLAS,1,[Define if you have a BLAS library.]),[$1])
        :
else
        acx_blas_ok=no
        $2
fi
])dnl ACX_BLAS
dnl @synopsis ACX_LAPACK([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
dnl
dnl This macro looks for a library that implements the LAPACK
dnl linear-algebra interface (see http://www.netlib.org/lapack/). On
dnl success, it sets the LAPACK_LIBS output variable to hold the
dnl requisite library linkages.
dnl
dnl To link with LAPACK, you should link with:
dnl
dnl     $LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS
dnl
dnl in that order. BLAS_LIBS is the output variable of the ACX_BLAS
dnl macro, called automatically. FLIBS is the output variable of the
dnl AC_F77_LIBRARY_LDFLAGS macro (called if necessary by ACX_BLAS), and
dnl is sometimes necessary in order to link with F77 libraries. Users
dnl will also need to use AC_F77_DUMMY_MAIN (see the autoconf manual),
dnl for the same reason.
dnl
dnl The user may also use --with-lapack=<lib> in order to use some
dnl specific LAPACK library <lib>. In order to link successfully,
dnl however, be aware that you will probably need to use the same
dnl Fortran compiler (which can be set via the F77 env. var.) as was
dnl used to compile the LAPACK and BLAS libraries.
dnl
dnl ACTION-IF-FOUND is a list of shell commands to run if a LAPACK
dnl library is found, and ACTION-IF-NOT-FOUND is a list of commands to
dnl run it if it is not found. If ACTION-IF-FOUND is not specified, the
dnl default action will define HAVE_LAPACK.
dnl
dnl @category InstalledPackages
dnl @author Steven G. Johnson <stevenj@alum.mit.edu>
dnl @version 2002-03-12
dnl @license GPLWithACException

AC_DEFUN([ACX_LAPACK], [
AC_REQUIRE([ACX_BLAS])
acx_lapack_ok=no

AC_ARG_WITH(lapack,
        [AC_HELP_STRING([--with-lapack=<lib>], [use LAPACK library <lib>])])
case $with_lapack in
        yes | "") ;;
        no) acx_lapack_ok=disable ;;
        -* | */* | *.a | *.so | *.so.* | *.o) LAPACK_LIBS="$with_lapack" ;;
        *) LAPACK_LIBS="-l$with_lapack" ;;
esac

# Get fortran linker name of LAPACK function to check for.
AC_F77_FUNC(cheev)

# We cannot use LAPACK if BLAS is not found
if test "x$acx_blas_ok" != xyes; then
        acx_lapack_ok=noblas
fi

# First, check LAPACK_LIBS environment variable
if test "x$LAPACK_LIBS" != x; then
        save_LIBS="$LIBS"; LIBS="$LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS"
        AC_MSG_CHECKING([for $cheev in $LAPACK_LIBS])
        AC_TRY_LINK_FUNC($cheev, [acx_lapack_ok=yes], [LAPACK_LIBS=""])
        AC_MSG_RESULT($acx_lapack_ok)
        LIBS="$save_LIBS"
        if test acx_lapack_ok = no; then
                LAPACK_LIBS=""
        fi
fi

# LAPACK linked to by default?  (is sometimes included in BLAS lib)
if test $acx_lapack_ok = no; then
        save_LIBS="$LIBS"; LIBS="$LIBS $BLAS_LIBS $FLIBS"
        AC_CHECK_FUNC($cheev, [acx_lapack_ok=yes])
        LIBS="$save_LIBS"
fi

# Generic LAPACK library?
for lapack in lapack lapack_rs6k; do
        if test $acx_lapack_ok = no; then
                save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS"
                AC_CHECK_LIB($lapack, $cheev,
                    [acx_lapack_ok=yes; LAPACK_LIBS="-l$lapack"], [], [$FLIBS])
                LIBS="$save_LIBS"
        fi
done

AC_SUBST(LAPACK_LIBS)

# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
if test x"$acx_lapack_ok" = xyes; then
        ifelse([$1],,AC_DEFINE(HAVE_LAPACK,1,[Define if you have LAPACK library.]),[$1])
        :
else
        acx_lapack_ok=no
        $2
fi
])dnl ACX_LAPACK
dnl @synopsis MDL_HAVE_OPENGL
dnl
dnl Search for OpenGL. We search first for Mesa (a GPL'ed version of
dnl Mesa) before a vendor's version of OpenGL, unless we were
dnl specifically asked not to with `--with-Mesa=no' or
dnl `--without-Mesa'.
dnl
dnl The four "standard" OpenGL libraries are searched for: "-lGL",
dnl "-lGLU", "-lGLX" (or "-lMesaGL", "-lMesaGLU" as the case may be)
dnl and "-lglut".
dnl
dnl All of the libraries that are found (since "-lglut" or "-lGLX"
dnl might be missing) are added to the shell output variable "GL_LIBS",
dnl along with any other libraries that are necessary to successfully
dnl link an OpenGL application (e.g. the X11 libraries). Care has been
dnl taken to make sure that all of the libraries in "GL_LIBS" are
dnl listed in the proper order.
dnl
dnl Additionally, the shell output variable "GL_CFLAGS" is set to any
dnl flags (e.g. "-I" flags) that are necessary to successfully compile
dnl an OpenGL application.
dnl
dnl The following shell variable (which are not output variables) are
dnl also set to either "yes" or "no" (depending on which libraries were
dnl found) to help you determine exactly what was found.
dnl
dnl   have_GL
dnl   have_GLU
dnl   have_GLX
dnl   have_glut
dnl
dnl A complete little toy "Automake `make distcheck'" package of how to
dnl use this macro is available at:
dnl
dnl   ftp://ftp.slac.stanford.edu/users/langston/autoconf/ac_opengl-0.01.tar.gz
dnl
dnl Please note that as the ac_opengl macro and the toy example
dnl evolves, the version number increases, so you may have to adjust
dnl the above URL accordingly.
dnl
dnl minor bugfix by ahmet inan <auto@ainan.org>
dnl
dnl @category InstalledPackages
dnl @author Matthew D. Langston <langston@SLAC.Stanford.EDU>
dnl @version 2002-09-25
dnl @license GPLWithACException

AC_DEFUN([MDL_HAVE_OPENGL],
[
  AC_REQUIRE([AC_PROG_CC])
  AC_REQUIRE([AC_PATH_X])
  AC_REQUIRE([AC_PATH_XTRA])

  AC_CACHE_CHECK([for OpenGL], mdl_cv_have_OpenGL,
  [
dnl Check for Mesa first, unless we were asked not to.
    AC_ARG_WITH([--with-Mesa],
                   [Prefer the Mesa library over a vendors native OpenGL library (default=yes)],
                   with_Mesa_help_string)
    AC_ARG_ENABLE(Mesa, $with_Mesa_help_string, use_Mesa=$enableval, use_Mesa=yes)

    if test x"$use_Mesa" = xyes; then
       GL_search_list="MesaGL   GL"
      GLU_search_list="MesaGLU GLU"
      GLX_search_list="MesaGLX GLX"
    else
       GL_search_list="GL  MesaGL"
      GLU_search_list="GLU MesaGLU"
      GLX_search_list="GLX MesaGLX"
    fi

    AC_LANG_SAVE
    AC_LANG_C

dnl If we are running under X11 then add in the appropriate libraries.
if test x"$no_x" != xyes; then
dnl Add everything we need to compile and link X programs to GL_X_CFLAGS
dnl and GL_X_LIBS.
  GL_CFLAGS="$X_CFLAGS"
  GL_X_LIBS="$X_PRE_LIBS $X_LIBS -lX11 -lXext -lXmu -lXt -lXi $X_EXTRA_LIBS"
fi
    GL_save_CPPFLAGS="$CPPFLAGS"
    CPPFLAGS="$GL_CFLAGS"

    GL_save_LIBS="$LIBS"
    LIBS="$GL_X_LIBS"


    # Save the "AC_MSG_RESULT file descriptor" to FD 8.
    exec 8>&AC_FD_MSG

    # Temporarily turn off AC_MSG_RESULT so that the user gets pretty
    # messages.
    exec AC_FD_MSG>/dev/null

    AC_SEARCH_LIBS(glAccum,          $GL_search_list, have_GL=yes,   have_GL=no)
    AC_SEARCH_LIBS(gluBeginCurve,   $GLU_search_list, have_GLU=yes,  have_GLU=no)
    AC_SEARCH_LIBS(glXChooseVisual, $GLX_search_list, have_GLX=yes,  have_GLX=no)
    AC_SEARCH_LIBS(glutInit,        glut,             have_glut=yes, have_glut=no)



    # Restore pretty messages.
    exec AC_FD_MSG>&8

    if test -n "$LIBS"; then
      mdl_cv_have_OpenGL=yes
      GL_LIBS="$LIBS"
      AC_SUBST(GL_CFLAGS)
      AC_SUBST(GL_LIBS)
    else
      mdl_cv_have_OpenGL=no
      GL_CFLAGS=
    fi

dnl Reset GL_X_LIBS regardless, since it was just a temporary variable
dnl and we don't want to be global namespace polluters.
    GL_X_LIBS=

    LIBS="$GL_save_LIBS"
    CPPFLAGS="$GL_save_CPPFLAGS"

    AC_LANG_RESTORE

dnl bugfix: dont forget to cache this variables, too
    mdl_cv_GL_CFLAGS="$GL_CFLAGS"
    mdl_cv_GL_LIBS="$GL_LIBS"
    mdl_cv_have_GL="$have_GL"
    mdl_cv_have_GLU="$have_GLU"
    mdl_cv_have_GLX="$have_GLX"
    mdl_cv_have_glut="$have_glut"
  ])
  GL_CFLAGS="$mdl_cv_GL_CFLAGS"
  GL_LIBS="$mdl_cv_GL_LIBS"
  have_GL="$mdl_cv_have_GL"
  have_GLU="$mdl_cv_have_GLU"
  have_GLX="$mdl_cv_have_GLX"
  have_glut="$mdl_cv_have_glut"
])
dnl endof bugfix -ainan