hdf5/fortran/acsite.m4

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dnl -------------------------------------------------------------------------
dnl -------------------------------------------------------------------------
dnl
dnl Copyright by the Board of Trustees of the University of Illinois.
dnl All rights reserved.
dnl
dnl This file is part of HDF5. The full HDF5 copyright notice, including
dnl terms governing use, modification, and redistribution, is contained in
dnl the files COPYING and Copyright.html. COPYING can be found at the root
dnl of the source code distribution tree; Copyright.html can be found at the
dnl root level of an installed copy of the electronic HDF5 document set and
dnl is linked from the top-level documents page. It can also be found at
dnl http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have
dnl access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu.
dnl
dnl Macros for HDF5 Fortran
dnl
dnl -------------------------------------------------------------------------
dnl -------------------------------------------------------------------------
dnl -------------------------------------------------------------------------
dnl AC_PROG_F9X
dnl
dnl Check for a Fortran 9X compiler.
dnl
AC_DEFUN(AC_PROG_F9X,
[AC_CHECK_PROGS(F9X, f90 pgf90 xlf90 f95 g95 xlf95)
test -z "$F9X" && AC_MSG_ERROR([no acceptable f9X compiler found in \$PATH])
AC_PROG_F9X_WORKS
AC_PROG_F9X_GNU
if test $ac_cv_prog_g9x = yes; then
G9X=yes
dnl Check whether -g works, even if FFLAGS is set, in case the package
dnl plays around with FFLAGS (such as to build both debugging and
dnl normal versions of a library), tasteless as that idea is.
ac_test_FFLAGS="${FFLAGS+set}"
ac_save_FFLAGS="$FFLAGS"
FFLAGS=
AC_PROG_F9X_G
if test "$ac_test_FFLAGS" = set; then
FFLAGS="$ac_save_FFLAGS"
elif test $ac_cv_prog_f9x_g = yes; then
FFLAGS="-g -O2"
else
FFLAGS="-O2"
fi
else
G9X=
test "${FFLAGS+set}" = set || FFLAGS="-g"
fi
])
dnl -------------------------------------------------------------------------
dnl AC_TRY_F9X_COMPILER()
dnl
dnl It would be nice if the compiler actually works.
dnl
AC_DEFUN(AC_TRY_F9X_COMPILER, [
cat > conftest.$ac_ext << EOF
[$1]
EOF
if AC_TRY_EVAL(ac_link) && test -s conftest${ac_exeext}; then
[$2]=yes
# If we can't run a trivial program, we are probably using a cross compiler.
if (./conftest; exit) 2>/dev/null; then
[$3]=no
else
[$3]=yes
fi
else
echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
[$2]=no
fi
rm -fr conftest*
])
dnl -------------------------------------------------------------------------
dnl AC_LANG_FORTRAN9X()
dnl
dnl Generic macro to setup the Fortran 9X specific env variables.
dnl
m4_define([AC_LANG(FORTRAN9X)],
[ac_ext=f90
ac_compile='${F9X-f90} -c $FFLAGS conftest.$ac_ext 1>&AS_MESSAGE_LOG_FD'
ac_link='${F9X-f90} -o conftest${ac_exeext} $FFLAGS conftest.$ac_ext $LDFLAGS $LIBS 1>&AS_MESSAGE_LOG_FD'
cross_compiling=$ac_cv_prog_f9x_cross
])
AU_DEFUN([AC_LANG_FORTRAN9X], [AC_LANG(FORTRAN9X)])
dnl -------------------------------------------------------------------------
dnl AC_LANG_F9X_WORKS()
dnl
dnl It would be nice if the compiler actually works.
dnl
AC_DEFUN(AC_PROG_F9X_WORKS, [
AC_MSG_CHECKING([whether the Fortran 9X compiler ($F9X $FFLAGS $LDFLAGS) works])
AC_LANG_SAVE
AC_LANG_FORTRAN9X
AC_TRY_F9X_COMPILER([
program conftest
end
], ac_cv_prog_f9x_works, ac_cv_prog_f9x_cross)
AC_LANG_RESTORE
AC_MSG_RESULT($ac_cv_prog_f9x_works)
if test $ac_cv_prog_f9x_works = no; then
AC_MSG_ERROR([installation or configuration problem: Fortran 9X compiler cannot create executables.])
fi
AC_MSG_CHECKING([whether the Fortran 9X compiler ($F9X $FFLAGS $LDFLAGS) is a cross-compiler])
AC_MSG_RESULT($ac_cv_prog_f9x_cross)
cross_compiling=$ac_cv_prog_f9x_cross
])
dnl -------------------------------------------------------------------------
dnl AC_PROG_F9X_GNU
dnl
dnl Test whether for Fortran 9X compiler is `g95' (the GNU Fortran 95
dnl Compiler). This test depends on whether the Fortran 9X compiler
dnl can do CPP pre-processing.
dnl
AC_DEFUN(AC_PROG_F9X_GNU,
[AC_CACHE_CHECK(whether we are using GNU Fortran 95, ac_cv_prog_g9x,
[cat > conftest.fpp <<EOF
#ifdef __GNUC__
yes
#endif
EOF
if AC_TRY_COMMAND($F9X -E conftest.fpp) | egrep yes >/dev/null 2>&1; then
ac_cv_prog_g9x=yes
else
ac_cv_prog_g9x=no
fi])])
dnl -------------------------------------------------------------------------
dnl AC_PROG_F9X_G
dnl
dnl Test whether the Fortran 9X compiler can accept the `-g' option
dnl to enable debugging.
dnl
AC_DEFUN(AC_PROG_F9X_G,
[AC_CACHE_CHECK(whether $F9X accepts -g, ac_cv_prog_f9x_g,
[cat > conftest.f << EOF
program conftest
end
EOF
if test -z "`$F9X -g -c conftest.f 2>&1`"; then
ac_cv_prog_f9x_g=yes
else
ac_cv_prog_f9x_g=no
fi
rm -f conftest*
])])
dnl -------------------------------------------------------------------------
dnl AC_F9X_OPT_FLAGS()
dnl
dnl Check for optimizer flags the Fortran compiler can use.
dnl
AC_DEFUN(AC_F9X_OPT_FLAGS,
[AC_MSG_CHECKING([for $F9X optimizer flags])
AC_LANG_SAVE
AC_LANG_FORTRAN9X
for flags in "-fast" "-O3" "-O" "";do
cat > conftest.$ac_ext <<EOF
program main
end
EOF
ac_compile='${F9X-f90} -c $flag $FFLAGS conftest.$ac_ext 1>&AS_MESSAGE_LOG_FD'
if AC_TRY_EVAL(ac_compile); then
if grep 'passed to ld' conftest.out > /dev/null 2>&1; then :; else
FFLAGS="$FFLAGS $flags"
break
fi
fi
done
if test -n "$flags"; then
echo "$flags" 1>&6
else
echo "none" 1>&6
fi
rm -f conftest*
])
dnl -------------------------------------------------------------------------
dnl AC_F9X_MODS()
dnl
dnl Check how F9X handles modules. This macro also checks which
dnl command-line option to use to include the module once it's built.
dnl
AC_DEFUN(AC_F9X_MODS,
[AC_MSG_CHECKING(what $F9X does with modules)
AC_LANG_SAVE
AC_LANG_FORTRAN9X
test -d conftestdir || mkdir conftestdir
cd conftestdir
rm -rf *
cat >conftest.$ac_ext <<EOF
module module
integer foo
end module module
EOF
eval $ac_compile
modfiles=""
F9XMODEXT=""
for f in conftest.o module.mod MODULE.mod module.M MODULE.M; do
if test -f "$f" ; then
modfiles="$f"
case "$f" in
*.o) F9XMODEXT="o" ;;
*.mod) F9XMODEXT="mod" ;;
*.M) F9XMODEXT="M" ;;
esac
fi
done
echo $modfiles 6>&1
if test "$modfiles" = file.o; then
echo $ac_n "checking whether $F9X -em is saner""... $ac_c" 1>&6
OLD_FFLAGS=$FFLAGS
FFLAGS="$FFLAGS -em"
eval $ac_compile
modfiles=""
for f in file.o module.mod MODULE.mod module.M MODULE.M; do
test -f $f && modfiles="$f"
done
if test "$modfiles" = "file.o"; then
FFLAGS=$OLD_FFLAGS
echo no 6>&1
else
echo yes 6>&1
fi
fi
cd ..
AC_MSG_CHECKING(how $F9X finds modules)
for flag in "-I" "-M" "-p"; do
cat >conftest.$ac_ext <<EOF
program conftest
use module
end program conftest
EOF
ac_compile='${F9X-f90} $FFLAGS ${flag}conftestdir -c conftest.$ac_ext 1>&AS_MESSAGE_LOG_FD'
if AC_TRY_EVAL(ac_compile); then
F9XMODFLAG=$flag
break
fi
done
if test -n "$F9XMODFLAG"; then
echo $F9XMODFLAG 1>&6
FFLAGS="$F9XMODFLAG. $F9XMODFLAG../src $FFLAGS"
else
echo unknown 1>&6
fi
AC_SUBST(F9XMODFLAG)
AC_SUBST(F9XMODEXT)
rm -rf conftest*
])
dnl -------------------------------------------------------------------------
dnl AC_TRY_FCOMPILE()
dnl
dnl Check if we can compile a simple Fortran 90 program.
dnl
dnl AC_TRY_FCOMPILE(FUNCTION-BODY,
dnl [ACTION-IF-SUCCESS], [ACTION-IF-NOT-SUCCESS])
dnl
AC_DEFUN([AC_TRY_FCOMPILE],
[AC_LANG_SAVE
AC_LANG_FORTRAN9X
test -d conftestdir || mkdir conftestdir
cd conftestdir
rm -rf *
cat >conftest.$ac_ext <<EOF
$1
EOF
if AC_TRY_EVAL(ac_compile); then
:
[$2]
else
:
[$3]
fi
cd ..
rm -rf conftest*
])
dnl -------------------------------------------------------------------------
dnl AC_TRY_FLINK()
dnl
dnl Check if we can link a simple Fortran 90 program.
dnl
dnl AC_TRY_FLINK(INCLUDES, FUNCTION-BODY,
dnl [ACTION-IF-SUCCESS], [ACTION-IF-NOT-SUCCESS])
dnl
AC_DEFUN([AC_TRY_FLINK],
[AC_LANG_SAVE
AC_LANG_FORTRAN9X
test -d conftestdir || mkdir conftestdir
cd conftestdir
rm -rf *
cat >conftest.$ac_ext <<EOF
program conftest
include '$1'
$2
end
EOF
if AC_TRY_EVAL(ac_compile) && AC_TRY_EVAL(ac_link); then
:
[$3]
else
:
[$4]
fi
cd ..
rm -rf conftest*
])
dnl -------------------------------------------------------------------------
dnl AC_CHECK_FLIB()
dnl
dnl Check if we can link a simple Fortran 90 program with the specified library.
dnl
dnl AC_CHECK_FLIB(LIBRARY, FUNCTION-BODY,
dnl [ACTION-IF-SUCCESS], [ACTION-IF-NOT-SUCCESS])
dnl
AC_DEFUN([AC_CHECK_FLIB],
[AC_LANG_SAVE
AC_LANG_FORTRAN9X
test -d conftestdir || mkdir conftestdir
cd conftestdir
rm -rf *
cat >conftest.$ac_ext <<EOF
program conftest
$2
end
EOF
if test -n "$1"; then
saved_LIBS="$LIBS"
LIBS="$LIBS -l$1"
fi
if AC_TRY_EVAL(ac_compile) && AC_TRY_EVAL(ac_link); then
:
[$3]
else
LIBS="$saved_LIBS"
[$4]
fi
cd ..
rm -rf conftest*
])
dnl -------------------------------------------------------------------------
dnl -------------------------------------------------------------------------
dnl
dnl Possible future tests for the Fortran stuff...
dnl
dnl -------------------------------------------------------------------------
dnl -------------------------------------------------------------------------
dnl
dnl echo $ac_n "checking whether f90 real type has 12 digits of precision""... $ac_c" 1>&6
dnl cat >conftest.f90 <<'EOF'
dnl program conftest
dnl if (selected_real_kind(12) .eq. kind(0.0)) then
dnl print '(a)','YES'
dnl else
dnl print '(a)','NO'
dnl end if
dnl end program conftest
dnl EOF
dnl $ac_cv_prog_F90 $FFLAGS -o conftest conftest.f90 > /dev/null 2>&1
dnl if test "`./conftest | head -1`" = YES; then
dnl echo "yes" 1>&6
dnl AC_DEFINE(HIPREC)
dnl else
dnl echo "no" 1>&6
dnl fi
dnl echo $ac_n "checking whether f90 precision of default real type""... $ac_c" 1>&6
dnl cat >conftest.f90 <<'EOF'
dnl program conftest
dnl if (kind(0.0) .eq. selected_real_kind(12) .or.&
dnl &kind(0.0) .eq. selected_real_kind(6) ) then
dnl print '(a)','YES'
dnl else
dnl print '(a)','NO'
dnl end if
dnl end program conftest
dnl EOF
dnl $ac_cv_prog_F90 $FFLAGS -o conftest conftest.f90 > /dev/null 2>&1
dnl if test "`./conftest | head -1`" = YES; then
dnl echo "OK" 1>&6
dnl AC_DEFINE(REALOK)
dnl else
dnl echo "no" 1>&6
dnl fi
dnl echo $ac_n "checking accuracy of arithmetic""... $ac_c" 1>&6
dnl cat >conftest.f90 <<'EOF'
dnl program conftest
dnl integer, parameter :: double=selected_real_kind(12)
dnl real(double), parameter :: ulp=2.0_double**(-47)
dnl real(double), parameter :: ans=0.92699498904359955986_double
dnl real(double) :: x,y,z
dnl integer i
dnl x=0.0_double
dnl y=ulp
dnl do i=2,100
dnl z=x+y
dnl x=y
dnl y=z-int(z)
dnl end do
dnl if (y-ans .lt. ulp/2.0_double) then
dnl print '(a)','YES'
dnl else
dnl print '(a)','NO'
dnl end if
dnl end program conftest
dnl EOF
dnl $ac_cv_prog_F90 $FFLAGS -o conftest conftest.f90 > /dev/null 2>&1
dnl if test "`./conftest | head -1`" = YES; then
dnl echo "OK" 1>&6
dnl AC_DEFINE(ARITHOK)
dnl else
dnl echo "no" 1>&6
dnl fi
dnl echo $ac_n "checking whether int is the fastest way to truncate""... $ac_c" 1>&6
dnl cat >conftest.f90 <<'EOF'
dnl program conftest
dnl integer, parameter :: double=selected_real_kind(12)
dnl real(double), parameter :: ulp=2.0_double**(-47)
dnl real(double) :: x,y,z,ya,yb
dnl integer :: t0,t1,i,timea,timeb
dnl
dnl x=0.0_double
dnl y=ulp
dnl call system_clock(t0)
dnl do i=2,1000000
dnl z=x+y
dnl x=y
dnl y=z-int(z)
dnl end do
dnl ya=y
dnl call system_clock(t1)
dnl timea=t1-t0
dnl
dnl x=0.0_double
dnl y=ulp
dnl call system_clock(t0)
dnl do i=2,1000000
dnl z=x+y
dnl x=y
dnl if (z.ge.1.0_double) then
dnl y=z-1.0_double
dnl else
dnl y=z
dnl end if
dnl end do
dnl yb=y
dnl call system_clock(t1)
dnl timeb=t1-t0
dnl
dnl if (timea.lt.timeb) then
dnl print '(a)','YES'
dnl else
dnl print '(a)','NO'
dnl end if
dnl print *,ya,yb
dnl end program conftest
dnl EOF
dnl $ac_cv_prog_F90 $FFLAGS -o conftest conftest.f90 > /dev/null 2>&1
dnl if test "`./conftest | head -1`" = YES; then
dnl echo "yes" 1>&6
dnl AC_DEFINE(USEINT)
dnl else
dnl echo "no" 1>&6
dnl fi
dnl
dnl -------------------------------------------------------------------------
dnl -------------------------------------------------------------------------