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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 -------------------------------------------------------------------------
+dnl -------------------------------------------------------------------------
+
+dnl *********************************
+dnl PURPOSE
+dnl Contains Macros for HDF5 Fortran
+dnl *********************************
+dnl
+dnl PAC_FC_SEARCH_LIST - expands to a whitespace separated list of modern
+dnl fortran compilers for use with AC_PROG_FC that is more suitable for HPC
+dnl software packages
+AC_DEFUN([PAC_FC_SEARCH_LIST],
+ [gfortran ifort pgf90 pathf90 pathf95 xlf90 xlf95 xlf2003 f90 epcf90 f95 fort lf95 g95 ifc efc gfc])
+dnl
+dnl PAC_PROG_FC([COMPILERS])
+dnl
+dnl COMPILERS is a space separated list of Fortran compilers to search for.
+dnl
+dnl Compilers are ordered by
+dnl 1. F90, F95, F2003
+dnl 2. Good/tested native compilers, bad/untested native compilers
+dnl 3. Wrappers around f2c go last.
+dnl
+dnl frt is the Fujitsu Fortran compiler.
+dnl pgf90 are the Portland Group F90 compilers.
+dnl xlf/xlf90/xlf95/xlf2003 are IBM (AIX) F90/F95/F2003 compilers.
+dnl lf95 is the Lahey-Fujitsu compiler.
+dnl fl32 is the Microsoft Fortran "PowerStation" compiler.
+dnl epcf90 is the "Edinburgh Portable Compiler" F90.
+dnl fort is the Compaq Fortran 90 (now 95) compiler for Tru64 and Linux/Alpha.
+dnl pathf90 is the Pathscale Fortran 90 compiler
+dnl ifort is another name for the Intel f90 compiler
+dnl efc - An older Intel compiler (?)
+dnl ifc - An older Intel compiler
+dnl fc - A compiler on some unknown system. This has been removed because
+dnl it may also be the name of a command for something other than
+dnl the Fortran compiler (e.g., fc=file system check!)
+dnl gfortran - The GNU Fortran compiler (not the same as g95)
+dnl gfc - An alias for gfortran recommended in cygwin installations
+dnl NOTE: this macro suffers from a basically intractable "expanded before it
+dnl was required" problem when libtool is also used
+dnl [1] MPICH.org
+dnl
+
+dnl See if the fortran compiler supports the intrinsic function "SIZEOF"
+
+AC_DEFUN([PAC_PROG_FC_SIZEOF],[
+ AC_MSG_CHECKING([if Fortran compiler supports intrinsic SIZEOF])
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+ PROGRAM main
+ i = sizeof(x)
+ END PROGRAM
+ ])],[AC_MSG_RESULT([yes])
+ HAVE_SIZEOF_FORTRAN="yes"],
+ [AC_MSG_RESULT([no])])
+])
+
+dnl See if the fortran compiler supports the intrinsic function "C_SIZEOF"
+
+AC_DEFUN([PAC_PROG_FC_C_SIZEOF],[
+ AC_MSG_CHECKING([if Fortran compiler supports intrinsic C_SIZEOF])
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+ PROGRAM main
+ USE ISO_C_BINDING
+ INTEGER(C_INT) :: a
+ INTEGER(C_SIZE_T) :: result
+ result = C_SIZEOF(a)
+ END PROGRAM
+ ])], [AC_MSG_RESULT([yes])
+ HAVE_C_SIZEOF_FORTRAN="yes"],
+ [AC_MSG_RESULT([no])])
+])
+
+dnl See if the fortran compiler supports the intrinsic function "STORAGE_SIZE"
+
+AC_DEFUN([PAC_PROG_FC_STORAGE_SIZE],[
+ AC_MSG_CHECKING([if Fortran compiler supports intrinsic STORAGE_SIZE])
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+ PROGRAM main
+ INTEGER :: a
+ INTEGER :: result
+ result = STORAGE_SIZE(a)
+ END PROGRAM
+ ])], [AC_MSG_RESULT([yes])
+ HAVE_STORAGE_SIZE_FORTRAN="yes"],
+ [AC_MSG_RESULT([no])])
+
+])
+
+dnl Check to see if -r8 was specified to determine if we need to
+dnl compile the DOUBLE PRECISION interfaces.
+
+AC_DEFUN([PAC_PROG_FC_DEFAULT_REALisDBLE],[
+ AC_MSG_CHECKING([if Fortran default REAL is DOUBLE PRECISION])
+
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+ MODULE type_mod
+ INTERFACE h5t
+ MODULE PROCEDURE h5t_real
+ MODULE PROCEDURE h5t_dble
+ END INTERFACE
+ CONTAINS
+ SUBROUTINE h5t_real(r)
+ REAL :: r
+ END SUBROUTINE h5t_real
+ SUBROUTINE h5t_dble(d)
+ DOUBLE PRECISION :: d
+ END SUBROUTINE h5t_dble
+ END MODULE type_mod
+ PROGRAM main
+ USE type_mod
+ REAL :: r
+ DOUBLE PRECISION :: d
+ CALL h5t(r)
+ CALL h5t(d)
+ END PROGRAM main
+ ])], [AC_MSG_RESULT([no])],
+ [AC_MSG_RESULT([yes])
+ FORTRAN_DEFAULT_REALisDBLE="yes"])
+])
+
+dnl Checking if the compiler supports the required Fortran 2003 features and
+dnl disable Fortran 2003 if it does not.
+
+AC_DEFUN([PAC_PROG_FC_HAVE_F2003_REQUIREMENTS],[
+ AC_MSG_CHECKING([if Fortran compiler version compatible with Fortran 2003 HDF])
+ HAVE_FORTRAN_2003="no"
+
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[
+
+ USE iso_c_binding
+ IMPLICIT NONE
+ TYPE(C_PTR) :: ptr
+ TYPE(C_FUNPTR) :: funptr
+ CHARACTER(LEN=80, KIND=c_char), TARGET :: ichr
+
+ ptr = C_LOC(ichr(1:1))
+
+ ])],[AC_MSG_RESULT([yes])
+ HAVE_F2003_REQUIREMENTS=[yes]],
+ [AC_MSG_RESULT([no])])
+])
+
+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 $FC does with modules)
+AC_LANG_PUSH(Fortran)
+
+test -d conftestdir || mkdir conftestdir
+cd conftestdir
+rm -rf *
+
+cat >conftest.$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 $FC -em is saner""... $ac_c" 1>&6
+ OLD_FCFLAGS=$FCFLAGS
+ FCFLAGS="$FCFLAGS -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 "$modfiles" = "file.o"; then
+ FCFLAGS=$OLD_FCFLAGS
+ echo no 6>&1
+ else
+ echo yes 6>&1
+ fi
+fi
+cd ..
+
+AC_MSG_CHECKING(how $FC finds modules)
+
+for flag in "-I" "-M" "-p"; do
+ cat >conftest.$ac_ext <<EOF
+ program conftest
+ use module
+ end program conftest
+EOF
+
+ ac_compile='${FC-f90} $FCFLAGS ${flag}conftestdir -c conftest.$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 $F9XMODFLAG 1>&6
+ FCFLAGS="$F9XMODFLAG. $FCFLAGS"
+else
+ echo unknown 1>&6
+fi
+AC_SUBST(F9XMODFLAG)
+AC_SUBST(F9XMODEXT)
+rm -rf conftest*
+AC_LANG_POP(Fortran)
+])
+