mirror of
https://github.com/HDFGroup/hdf5.git
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8055378bce
Adding the Fortran interface to the HDF5 library Description: Fortran is now a subdirectory of the HDF5 library tree. Platforms tested: Solaris and IRIX (O2K)
378 lines
9.6 KiB
Plaintext
378 lines
9.6 KiB
Plaintext
dnl -------------------------------------------------------------------------
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dnl -------------------------------------------------------------------------
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dnl
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dnl Macros for HDF5 Fortran
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dnl
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dnl Copyright (C) 2000 National Center for Supercomputing Applications.
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dnl All rights reserved.
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dnl -------------------------------------------------------------------------
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dnl -------------------------------------------------------------------------
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dnl -------------------------------------------------------------------------
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dnl AC_PROG_F9X
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dnl
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dnl Check for a Fortran 9X compiler.
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dnl
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AC_DEFUN(AC_PROG_F9X,
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[AC_CHECK_PROGS(F9X, f90 pgf90 f95 g95)
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test -z "$CC" && AC_MSG_ERROR([no acceptable f9X compiler found in \$PATH])
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AC_PROG_F9X_WORKS
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AC_PROG_F9X_GNU
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if test $ac_cv_prog_g9x = yes; then
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G9X=yes
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dnl Check whether -g works, even if FFLAGS is set, in case the package
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dnl plays around with FFLAGS (such as to build both debugging and
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dnl normal versions of a library), tasteless as that idea is.
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ac_test_FFLAGS="${FFLAGS+set}"
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ac_save_FFLAGS="$FFLAGS"
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FFLAGS=
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AC_PROG_F9X_G
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if test "$ac_test_FFLAGS" = set; then
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FFLAGS="$ac_save_FFLAGS"
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elif test $ac_cv_prog_f9x_g = yes; then
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FFLAGS="-g -O2"
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else
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FFLAGS="-O2"
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fi
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else
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G9X=
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test "${FFLAGS+set}" = set || FFLAGS="-g"
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fi
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])
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dnl -------------------------------------------------------------------------
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dnl AC_TRY_F9X_COMPILER()
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dnl
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dnl It would be nice if the compiler actually works.
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dnl
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AC_DEFUN(AC_TRY_F9X_COMPILER, [
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cat > conftest.$ac_ext << EOF
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[$1]
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EOF
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if AC_TRY_EVAL(ac_link) && test -s conftest${ac_exeext}; then
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[$2]=yes
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# If we can't run a trivial program, we are probably using a cross compiler.
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if (./conftest; exit) 2>/dev/null; then
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[$3]=no
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else
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[$3]=yes
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fi
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else
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echo "configure: failed program was:" >&AC_FD_CC
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cat conftest.$ac_ext >&AC_FD_CC
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[$2]=no
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fi
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rm -fr conftest*
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])
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dnl -------------------------------------------------------------------------
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dnl AC_LANG_F9X_WORKS()
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dnl
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dnl It would be nice if the compiler actually works.
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dnl
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AC_DEFUN(AC_PROG_F9X_WORKS, [
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AC_MSG_CHECKING([whether the Fortran 9X compiler ($F9X $FFLAGS $LDFLAGS) works])
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AC_LANG_SAVE
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AC_LANG_FORTRAN9X
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AC_TRY_F9X_COMPILER([
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program conftest
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end
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], ac_cv_prog_f9x_works, ac_cv_prog_f9x_cross)
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AC_LANG_RESTORE
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AC_MSG_RESULT($ac_cv_prog_f9x_works)
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if test $ac_cv_prog_f9x_works = no; then
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AC_MSG_ERROR([installation or configuration problem: Fortran 9X compiler cannot create executables.])
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fi
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AC_MSG_CHECKING([whether the Fortran 9X compiler ($F9X $FFLAGS $LDFLAGS) is a cross-compiler])
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AC_MSG_RESULT($ac_cv_prog_f9x_cross)
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cross_compiling=$ac_cv_prog_f9x_cross
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])
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dnl -------------------------------------------------------------------------
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dnl AC_LANG_FORTRAN9X()
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dnl
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dnl Generic macro to setup the Fortran 9X specific env variables.
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dnl
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AC_DEFUN(AC_LANG_FORTRAN9X, [
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define([AC_LANG], [FORTRAN9X])
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ac_ext=f90
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ac_compile='${F9X-f90} -c $FFLAGS conftest.$ac_ext 1>&AC_FD_CC'
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ac_link='${F9X-f90} -o conftest${ac_exeext} $FFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&AC_FD_CC'
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cross_compiling=$ac_cv_prog_f9x_cross
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])
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dnl -------------------------------------------------------------------------
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dnl AC_PROG_F9X_GNU
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dnl
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dnl Test whether for Fortran 9X compiler is `g95' (the GNU Fortran 95
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dnl Compiler). This test depends on whether the Fortran 9X compiler
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dnl can do CPP pre-processing.
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dnl
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AC_DEFUN(AC_PROG_F9X_GNU,
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[AC_CACHE_CHECK(whether we are using GNU Fortran 95, ac_cv_prog_g9x,
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[cat > conftest.fpp <<EOF
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#ifdef __GNUC__
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yes
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#endif
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EOF
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if AC_TRY_COMMAND($F9X -E conftest.fpp) | egrep yes >/dev/null 2>&1; then
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ac_cv_prog_g9x=yes
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else
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ac_cv_prog_g9x=no
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fi])])
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dnl -------------------------------------------------------------------------
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dnl AC_PROG_F9X_G
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dnl
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dnl Test whether the Fortran 9X compiler can accept the `-g' option
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dnl to enable debugging.
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dnl
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AC_DEFUN(AC_PROG_F9X_G,
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[AC_CACHE_CHECK(whether $F9X accepts -g, ac_cv_prog_f9x_g,
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[cat > conftest.f << EOF
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program conftest
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end
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EOF
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if test -z "`$F9X -g -c conftest.f 2>&1`"; then
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ac_cv_prog_f9x_g=yes
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else
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ac_cv_prog_f9x_g=no
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fi
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rm -f conftest*
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])])
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dnl -------------------------------------------------------------------------
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dnl AC_F9X_OPT_FLAGS()
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dnl
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dnl Check for optimizer flags the Fortran compiler can use.
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dnl
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AC_DEFUN(AC_F9X_OPT_FLAGS,
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[AC_MSG_CHECKING([for $F9X optimizer flags])
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AC_LANG_SAVE
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AC_LANG_FORTRAN9X
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for flags in "-fast" "-O3" "-O" "";do
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cat > conftest.$ac_ext <<EOF
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program main
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end
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EOF
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ac_compile='${F9X-f90} -c $flag $FFLAGS conftest.$ac_ext 1>&AC_FD_CC'
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if AC_TRY_EVAL(ac_compile); then
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if grep 'passed to ld' conftest.out > /dev/null 2>&1; then :; else
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FFLAGS="$FFLAGS $flags"
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break
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fi
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fi
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done
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if test -n "$flags"; then
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echo "$flags" 1>&6
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else
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echo "none" 1>&6
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fi
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rm -f conftest*])
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dnl -------------------------------------------------------------------------
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dnl AC_F9X_MODS()
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dnl
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dnl Check how F9X handles modules. This macro also checks which
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dnl command-line option to use to include the module once it's built.
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dnl
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AC_DEFUN(AC_F9X_MODS,
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[AC_MSG_CHECKING(what $F9X does with modules)
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AC_LANG_SAVE
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AC_LANG_FORTRAN9X
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test -d conftestdir || mkdir conftestdir
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cd conftestdir
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rm -rf *
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cat >conftest.$ac_ext <<EOF
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module module
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integer foo
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end module module
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EOF
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eval $ac_compile
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modfiles=""
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for f in conftest.o module.mod MODULE.mod; do
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test -f $f && modfiles="$f"
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done
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echo $modfiles 6>&1
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if test "$modfiles" = file.o; then
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echo $ac_n "checking whether $F9X -em is saner""... $ac_c" 1>&6
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OLD_FFLAGS=$FFLAGS
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FFLAGS="$FFLAGS -em"
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eval $ac_compile
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modfiles=""
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for f in file.o module.mod MODULE.mod; do
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test -f $f && modfiles="$f"
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done
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if test "$modfiles" = file.o;then
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FFLAGS=$OLD_FFLAGS
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echo no 6>&1
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else
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echo yes 6>&1
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fi
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fi
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cd ..
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AC_MSG_CHECKING(how $F9X finds modules)
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for flag in "-p" "-M" "-I"; do
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cat >conftest.$ac_ext <<EOF
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program conftest
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use module
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end program conftest
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EOF
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ac_compile='${F9X-f90} $FFLAGS ${flag}conftestdir -c conftest.$ac_ext 1>&AC_FD_CC'
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if AC_TRY_EVAL(ac_compile); then
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F9XMODFLAG=$flag
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break
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fi
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done
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if test -n "$F9XMODFLAG"; then
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echo $F9XMODFLAG 1>&6
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else
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echo unknown 1>&6
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fi
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AC_SUBST(F9XMODFLAG)
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rm -rf conftest*])
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dnl -------------------------------------------------------------------------
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dnl -------------------------------------------------------------------------
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dnl
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dnl Possible future tests for the Fortran stuff...
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dnl
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dnl -------------------------------------------------------------------------
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dnl -------------------------------------------------------------------------
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dnl
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dnl echo $ac_n "checking whether f90 real type has 12 digits of precision""... $ac_c" 1>&6
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dnl cat >conftest.f90 <<'EOF'
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dnl program conftest
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dnl if (selected_real_kind(12) .eq. kind(0.0)) then
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dnl print '(a)','YES'
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dnl else
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dnl print '(a)','NO'
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dnl end if
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dnl end program conftest
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dnl EOF
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dnl $ac_cv_prog_F90 $FFLAGS -o conftest conftest.f90 > /dev/null 2>&1
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dnl if test "`./conftest | head -1`" = YES; then
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dnl echo "yes" 1>&6
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dnl AC_DEFINE(HIPREC)
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dnl else
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dnl echo "no" 1>&6
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dnl fi
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dnl echo $ac_n "checking whether f90 precision of default real type""... $ac_c" 1>&6
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dnl cat >conftest.f90 <<'EOF'
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dnl program conftest
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dnl if (kind(0.0) .eq. selected_real_kind(12) .or.&
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dnl &kind(0.0) .eq. selected_real_kind(6) ) then
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dnl print '(a)','YES'
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dnl else
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dnl print '(a)','NO'
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dnl end if
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dnl end program conftest
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dnl EOF
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dnl $ac_cv_prog_F90 $FFLAGS -o conftest conftest.f90 > /dev/null 2>&1
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dnl if test "`./conftest | head -1`" = YES; then
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dnl echo "OK" 1>&6
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dnl AC_DEFINE(REALOK)
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dnl else
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dnl echo "no" 1>&6
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dnl fi
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dnl echo $ac_n "checking accuracy of arithmetic""... $ac_c" 1>&6
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dnl cat >conftest.f90 <<'EOF'
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dnl program conftest
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dnl integer, parameter :: double=selected_real_kind(12)
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dnl real(double), parameter :: ulp=2.0_double**(-47)
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dnl real(double), parameter :: ans=0.92699498904359955986_double
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dnl real(double) :: x,y,z
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dnl integer i
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dnl x=0.0_double
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dnl y=ulp
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dnl do i=2,100
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dnl z=x+y
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dnl x=y
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dnl y=z-int(z)
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dnl end do
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dnl if (y-ans .lt. ulp/2.0_double) then
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dnl print '(a)','YES'
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dnl else
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dnl print '(a)','NO'
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dnl end if
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dnl end program conftest
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dnl EOF
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dnl $ac_cv_prog_F90 $FFLAGS -o conftest conftest.f90 > /dev/null 2>&1
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dnl if test "`./conftest | head -1`" = YES; then
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dnl echo "OK" 1>&6
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dnl AC_DEFINE(ARITHOK)
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dnl else
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dnl echo "no" 1>&6
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dnl fi
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dnl echo $ac_n "checking whether int is the fastest way to truncate""... $ac_c" 1>&6
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dnl cat >conftest.f90 <<'EOF'
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dnl program conftest
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dnl integer, parameter :: double=selected_real_kind(12)
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dnl real(double), parameter :: ulp=2.0_double**(-47)
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dnl real(double) :: x,y,z,ya,yb
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dnl integer :: t0,t1,i,timea,timeb
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dnl
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dnl x=0.0_double
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dnl y=ulp
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dnl call system_clock(t0)
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dnl do i=2,1000000
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dnl z=x+y
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dnl x=y
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dnl y=z-int(z)
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dnl end do
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dnl ya=y
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dnl call system_clock(t1)
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dnl timea=t1-t0
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dnl
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dnl x=0.0_double
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dnl y=ulp
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dnl call system_clock(t0)
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dnl do i=2,1000000
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dnl z=x+y
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dnl x=y
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dnl if (z.ge.1.0_double) then
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dnl y=z-1.0_double
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dnl else
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dnl y=z
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dnl end if
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dnl end do
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dnl yb=y
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dnl call system_clock(t1)
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dnl timeb=t1-t0
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dnl
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dnl if (timea.lt.timeb) then
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dnl print '(a)','YES'
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dnl else
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dnl print '(a)','NO'
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dnl end if
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dnl print *,ya,yb
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dnl end program conftest
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dnl EOF
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dnl $ac_cv_prog_F90 $FFLAGS -o conftest conftest.f90 > /dev/null 2>&1
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dnl if test "`./conftest | head -1`" = YES; then
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dnl echo "yes" 1>&6
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dnl AC_DEFINE(USEINT)
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dnl else
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dnl echo "no" 1>&6
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dnl fi
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dnl
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dnl -------------------------------------------------------------------------
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dnl -------------------------------------------------------------------------
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