aclocal.m4

MPICH是MPI的重要研究,提供了一系列的接口函数,为并行计算的实现提供了编程环境.

      else
	  CC=$CCval
      fi
	;;
    ncube)   CC=ncc ;;
    rs6000)
      CCval=""
      PAC_PROGRAMS_CHECK(CCval,xlC xlc cc)
      if test -n "$CCval" ; then
	 CC=$CCval
         GCC=""
      fi
      ;;
    *)
      CCval=""
      # Pick the vendor's cc ahead of gcc.
      PAC_PROGRAMS_CHECK(CCval,cc gcc)
      if test -n "$CCval" ; then
	 CC=$CCval
      fi
      ;;
esac
fi
dnl if test -n "$CC" ; then
dnl    PAC_PROGRAM_CHECK(HAS_CC,$CC,1,0)
dnl fi
if test -z "$USERCLINKER" -a -z "$CLINKER" ; then
    CLINKER="$CC"
fi
])dnl
dnl
dnl PAC_GET_ANSI_CC(...) is like PAC_GET_CC, but it checks that CC
dnl accepts ANSI-style prototypes.  If not, it then tries to use gcc
dnl
define(PAC_GET_ANSI_CC,[
PAC_GET_CC($1)
PAC_CHECK_CC_PROTOTYPES(,noproto=1)
if test -n "$noproto" ; then
    print_error "The compiler $CC does not accept ANSI prototypes"
    CC=""
    PAC_PROGRAM_CHECK(CC,gcc,gcc)
    if test -n "$CC" ; then
	PAC_CHECK_COMPILER_OK(,exit 1)
	PAC_CHECK_CC_PROTOTYPES(,exit 1)
        print_error "Using $CC as the C compiler instead"
	CLINKER=$CC
    else
	CC=""
        CLINKER=""
    fi
fi
])dnl
dnl
dnl
dnl May also set F77GETARG (routine to get commandline arguments)
dnl Also sets HAS_F77 (makes sure that the chosen compiler is present!)
dnl
define(PAC_GET_F77,[
if test -z "$USERF77" ; then
case $1 in 
   intelnx|paragon|i860) F77=if77 ;;
   cm5) # TMC Told us this should be f77
        F77=f77 ; if test -z "$USERFLINKER" ; then
		      FLINKER="cmmd-ld -comp $F77"
		  fi ;;
   CRAY)
   # The Fortran compiler might be cf77 or f77
   # This wierd function uses the VALUE of the first argument before
   # the second!
   F77=	
   PAC_PROGRAMS_CHECK(F77,cf77 f77)
   ;;
   cray_t3d)        
# The dp switch on the following lines allows compilation of "double precision"
# at the cost of violating the Fortran standard
   print_error Setting double precision to be the same as real, in violation 
   print_error of the Fortran standard.  This is needed because Cray Fortran 
   print_error for the T3D does not support double precision and hence is 
   print_error not actually Fortran.
   F77="/mpp/bin/cf77"
   FFLAGS="$FFLAGS -Ccray-t3d -dp"
   F77GETARG="call pxfgetarg(i,s,len(s),ierr)"
   if test -z "$USERFLINKER" ; then
       FLINKER="$F77 -Ccray-t3d"
   fi
   ;;
#
#  SX4 Floating Point formats
#
#  float = float0 : Conforms IEEE 754 standard.
#                   C:       sizeof (int)     = 4; sizeof (float) = 4
#                   FORTRAN: sizeof (INTEGER) = 4; sizeof (REAL)  = 4
#
#  float = float1 : IBM  floating point format
#                   C:       sizeof (int)     = 4; sizeof (float) = 4
#                   FORTRAN: sizeof (INTEGER) = 4; sizeof (REAL)  = 4
#
#  float = float2 : CRAY floating point format
#                   C:       sizeof (int)     = 4; sizeof (float) = 8
#                   FORTRAN: sizeof (INTEGER) = 8; sizeof (REAL)  = 8
#                   !!! Will not work for FORTRAN and MPICH !!!
#
#  float = float2_int64 : CRAY floating point format
#                   C:       sizeof (int)     = 8; sizeof (float) = 8
#                   FORTRAN: sizeof (INTEGER) = 8; sizeof (REAL)  = 8
#
   SX_4_float0 | SX_4_float1 | SX_4_float2 | SX_4_float2_int64)
         arch_SX_4=1
#
         float=`expr $CARCH : 'SX_4_\(float.\).*'`
         w8=`expr $CARCH : "SX_4_float._\(ew\).*" \| "dw"`
         sx4int=`expr $CARCH : ".*_\(int64\).*" \| "int32"`
#
         echo "Generating MPICH for floating point format \`\`$float''"
#
         if test "$w8" = "ew" ; then
            echo "                 and extended numeric storage \`\`$w8''"
         else
            if test "$sx4int" = "int64" ; then
               echo "                 and sizeof (int) = 64"
            elif test "$float" = "float2" ; then
               cat << EOF
***********************************************************************
*
*   WARNING:
*
*   MPICH is generated for floating point format \`\`float2'' without
*         expanding C int's to 64 bits.
*         This version will not run together with FORTRAN codes.
*
***********************************************************************
EOF
            fi
         fi
#
         CCC="CC"
         CC="cc"; ASM="as -m -h $float"
         OPTFLAGSC="-h2 -hsetmain -hnoflunf -pvctl,nomsg"
         CFLAGS="-h$float -DCHAR_PTR_IS_ADDRESS"
         FFLAGS="-$float"
         LIB_LIST="$LIB_LIST -li77sx"
#
         if test -z "$USERCLINKER" ; then
            CLINKER="cc -h$float"; fi
         if test -z "$USERCCLINKER" ; then
            CCLINKER="CC -h$float"; fi
         if test -z "$USERFLINKER" ; then
            FLINKER="f77 -$float"; fi
#
         if test "$w8" = "ew" ; then
            FLINKER="$FLINKER -ew"
            CFLAGS="$CFLAGS -D_W8"
            FFLAGS="$FFLAGS -ew"
         fi
#
         if test "$sx4int" = "int64" ; then
            CFLAGS="$CFLAGS -hint64"
            CLINKER="$CLINKER -hint64"
            FLINKER="$FLINKER -Wl'-int64'"
         fi
#
         CCFLAGS="$CFLAGS"
    ;;
#
   hpux) 
    # This may eliminate the need for +U77 ....
    if test "`which $F77`" != "/usr/convex/bin/fc" ; then 
        F77GETARG=["call igetarg(i,s,len(s))"]
	# mgates reports that the +T option makes MPICH work on some HPUX
	# platforms.  The documentation for +T is truely scary; it seems
	# to imply that without it, a Fortran program will NOT run correctly.
        # The hpux F90 compiler doesn't accept +T.  Since we currently set
	# F90FLAGS to FFLAGS by default, 
        if test -z "$USER_SET_F90FLAGS" -a -z "$F90FLAGS" ; then
	    F90FLAGS="$FFLAGS"
	    USER_SET_F90FLAGS=1
	fi
	FFLAGS="$FFLAGS +T"
    else
        # The Convex compiler needs to have optimization messages suppressed
        FFLAGS="$FFLAGS -or none"
    fi
    # There are reports that version 10 Fortran requires +U77
    ;;
    convex_spp)  F77="/usr/convex/bin/fc" ;;
    ibmpoe)
         dnl This is intended for the Standard POE/MPL version
	 F77=mpxlf
    ;;
    meiko) 
      PAC_PROGRAMS_CHECK(FCval,f77 apf77 pgf77)
      if test -n "$FCval" -a "$FCval" = f77 ; then
	F77="f77 -g -cg92"
      else
        F77="$FCval"
      fi
      ;;
    ncube)   F77=nf77 ;;
    rs6000)  F77=xlf ;;
    LINUX|linux) 
      PAC_PROGRAMS_CHECK(F77,f77 fort77 g77)
      ;;
esac
fi
if test -z "$USERFLINKER" -a -z "$FLINKER" ; then
    FLINKER="$F77"
fi
#
# Check that the Fortran compiler is actually available:
HAS_F77=
if test -n "$F77" ; then
    PAC_PROGRAM_CHECK(HAS_F77,$F77,1,0,F77FULL)
    # if test -n "$F77FULL" ; then
	# Really should replace with full path....
        # but would need to capture arguments as well...
	dnl F77=$F77FULL
    # fi
fi
])dnl
dnl
dnl Fortran runtime for Fortran/C linking
dnl On suns, try
dnl FC_LIB          =/usr/local/lang/SC2.0.1/libM77.a \ 
dnl              /usr/local/lang/SC2.0.1/libF77.a -lm \
dnl              /usr/local/lang/SC2.0.1/libm.a \
dnl              /usr/local/lang/SC2.0.1/libansi.a
dnl
dnl AIX requires -bI:/usr/lpp/xlf/lib/lowsys.exp
dnl ------------------------------------------------------------------------
dnl
dnl Get the format of Fortran names.  Uses F77, FFLAGS, and sets WDEF.
dnl If the test fails, sets NOF77 to 1, HAS_FORTRAN to 0
dnl
define(PAC_GET_FORTNAMES,[
   # Check for strange behavior of Fortran.  For example, some FreeBSD
   # systems use f2c to implement f77, and the version of f2c that they 
   # use generates TWO (!!!) trailing underscores
   # Currently, WDEF is not used but could be...
   #
   # Eventually, we want to be able to override the choices here and
   # force a particular form.  This is particularly useful in systems
   # where a Fortran compiler option is used to force a particular
   # external name format (rs6000 xlf, for example).
   cat > confftest.f <<EOF
       subroutine mpir_init_fop( a )
       integer a
       a = 1
       return
       end
EOF
   $F77 $FFLAGS -c confftest.f > /dev/null 2>&1
   if test ! -s confftest.o ; then
        print_error "Unable to test Fortran compiler"
        print_error "(compiling a test program failed to produce an "
        print_error "object file)."
	NOF77=1
        HAS_FORTRAN=0
   elif test -z "$FORTRANNAMES" ; then
    # We have to be careful here, since the name may occur in several
    # forms.  We try to handle this by testing for several forms
    # directly.
    if test $arch_CRAY ; then
     # Cray doesn't accept -a ...
     nameform1=`strings confftest.o | grep mpir_init_fop_  | sed -n -e '1p'`
     nameform2=`strings confftest.o | grep MPIR_INIT_FOP   | sed -n -e '1p'`
     nameform3=`strings confftest.o | grep mpir_init_fop   | sed -n -e '1p'`
     nameform4=`strings confftest.o | grep mpir_init_fop__ | sed -n -e '1p'`
    else
     nameform1=`strings -a confftest.o | grep mpir_init_fop_  | sed -n -e '1p'`
     nameform2=`strings -a confftest.o | grep MPIR_INIT_FOP   | sed -n -e '1p'`
     nameform3=`strings -a confftest.o | grep mpir_init_fop   | sed -n -e '1p'`
     nameform4=`strings -a confftest.o | grep mpir_init_fop__ | sed -n -e '1p'`
    fi
    /bin/rm -f confftest.f confftest.o
    if test -n "$nameform4" ; then
	echo "Fortran externals are lower case and have 1 or 2 trailing underscores"
	FORTRANNAMES="FORTRANDOUBLEUNDERSCORE"
    elif test -n "$nameform1" ; then
        # We don't set this in CFLAGS; it is a default case
        echo "Fortran externals have a trailing underscore and are lowercase"
	FORTRANNAMES="FORTRANUNDERSCORE"
    elif test -n "$nameform2" ; then
	echo "Fortran externals are uppercase"     
	FORTRANNAMES="FORTRANCAPS" 
    elif test -n "$nameform3" ; then
	echo "Fortran externals are lower case"
	FORTRANNAMES="FORTRANNOUNDERSCORE"
    else
	print_error "Unable to determine the form of Fortran external names"
	print_error "Make sure that the compiler $F77 can be run on this system"
#	print_error "If you have problems linking, try using the -nof77 option"
#        print_error "to configure and rebuild MPICH."
	print_error "Turning off Fortran (-nof77 being assumed)."
	NOF77=1
        HAS_FORTRAN=0
    fi
#   case $nameform in 
#       MPIR_INIT_FOP | _MPIR_INIT_FOP)
#	echo "Fortran externals are uppercase"     
#	WDEF=-DFORTRANCAPS 
#	;;
#       mpir_init_fop_ | _mpir_init_fop_)   
#	 # We don't set this in CFLAGS; it is a default case
#        echo "Fortran externals have a trailing underscore and are lowercase"
#	WDEF=-DFORTRANUNDERSCORE ;;
#
#       mpir_init_fop | _mpir_init_fop)     
#	echo "Fortran externals are lower case"
#	WDEF=-DFORTRANNOUNDERSCORE 
#	;;
#
#           # Fortran no underscore is the "default" case for the wrappers; 
#	   # having this defined allows us to have an explicit test, 
#	   # particularly since the most common UNIX case is FORTRANUNDERSCORE
#       mpir_init_fop__ | _mpir_init_fop__)  
#	echo "Fortran externals are lower case and have 1 or 2 trailing underscores"
#	WDEF=-DFORTRANDOUBLEUNDERSCORE
#        ;;
#
#       *)
#	print_error "Unable to determine the form of Fortran external names"
#	print_error "If you have problems linking, try using the -nof77 option"
#        print_error "to configure and rebuild MPICH."
#	NOF77=1
#        HAS_FORTRAN=0
#	;;
#   esac
    fi
    if test -n "$FORTRANNAMES" ; then
        WDEF="-D$FORTRANNAMES"
    fi
    ])dnl
dnl
dnl ------------------------------------------------------------------------
dnl
dnl AR = name with args to create/add to archive
dnl As input, ARLOCAL is the arg that should be use for using the local 
dnl directory
dnl ARNAME = just name
dnl ARARGS = just args
define(PAC_GET_AR,[
if test -z "$USERAR" ; then
case $1 in 
   intelnx|paragon|i860) AR="ar860 crl" ; ARNAME="ar860" ; ARARGS="crl" ;;
   cm5) AR="ar cr" ; ARNAME="ar" ; ARARGS="cr"
   ;;
   meiko|solaris) AR="ar cr" ; ARNAME="ar" ; ARARGS="cr" 
   ;;
   ncube) AR="nar cr" ; ARNAME="nar" ; ARARGS="cr" ;;
esac
fi
if test -z "$AR" ; then 
    AR="ar cr$ARLOCAL" ; ARNAME="ar" ; ARARGS="cr$ARLOCAL" 
fi
])dnl
dnl --------------------------------------------------------
dnl Find X11.  This is more careful than the AC version
dnl Uses USERXLIB; sets x_includes, X11INC, x_libraries, X11LIB, no_x
dnl
define(PAC_FIND_X11,[
   # FIND_X doesn't always work correctly when cross compiling, so we
   # try to be more careful and conservative
   if test -z "$USERXLIB" ; then 
    # The user has specified the libraries/include paths; pick them up 
    # below....
    if test -z "$cross_compiling" -o "$cross_compiling" = 0 ; then 
       AC_FIND_X()
       if test -n "$no_x" ; then
	  print_error "Did not find X11 libraries and/or include files"
       fi
    else
       # Try to compile a program with an include file.
       # I didn't use HEADER_CHECK because I want to insist that the 
       # code try to compile with the header
       no_x=true
       AC_COMPILE_CHECK([X11 headers],[#include <X11/Xlib.h>],,no_x="")
       if test -z "$no_x" ; then 
          # Try to link a simple X program
          AC_HAVE_LIBRARY(X11,no_x="",no_x="true")
       fi
       if test -n "$no_x" ; then
         print_error " " 
         print_error "X11 is not used when cross compiling (because of the"
         print_error "difficulties in finding the correct libraries)"
         print_error " "
       fi
     fi
   else
	# Pick up the paths from the user if possible
	if test -z "$x_includes" -a -n "$X11INC" ; then 
	    x_includes="$X11INC"
            XINCLUDES="-Ix_includes"
	fi
	if test -z "$x_libraries" -a -n "$X11LIB" ; then 
	    x_libraries="$X11LIB"
	fi
   fi
   if test -n "$x_includes" ; then
       XINCLUDES="-I$x_includes"
   fi
   if test -z "$no_x" ; then
       # may STILL not have x if the include files aren't around
       if test -n "$x_includes" ; then
           f_test=$x_includes/X11/Xlib.h
       else
           f_test=/usr/include/X11/Xlib.h
       fi
       if test ! -f $f_test ; then
           no_x=true
	   print_error "X11 include files were not found in $f_test!"
       fi
   fi
])dnl
dnl
dnl --------------------------------------------------------
dnl Internal subroutine of AC_FIND_X.  We had to update this because it
dnl did not know about R6.
define([AC_FIND_X_DIRECT],
[echo checking for X include and library files directly
AC_TEST_CPP([#include <X11/Intrinsic.h>], no_x=,
  for dir in \
    /usr/local/include \
    /usr/unsupported/include \
    /usr/x386/include \
    /usr/local/X11R6/include \
    /usr/local/X11R5/include \
    /usr/local/x11r6/include \
    /usr/local/x11r5/include \
    /usr/include/X11R6 \
    /usr/include/X11R5 \
    /usr/include/X11R4 \
    /usr/X11R6/include \
    /usr/X11R5/include \
    /usr/X11/include \
    /usr/openwin/include \
    /usr/openwin/share/include \
    /usr/lpp/Xamples/include \
    ; \
  do
    if test -r $dir/X11/Intrinsic.h; then
      x_includes=$dir; no_x=
      break
    fi
  done)

# Check for the libraries.  First see if replacing the `include' by
# `lib' works.