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dnl -*- shell-script -*-
dnl
dnl Copyright (c) 2004-2006 The Trustees of Indiana University and Indiana
dnl University Research and Technology
dnl Corporation. All rights reserved.
dnl Copyright (c) 2004-2005 The University of Tennessee and The University
dnl of Tennessee Research Foundation. All rights
dnl reserved.
dnl Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
dnl University of Stuttgart. All rights reserved.
dnl Copyright (c) 2004-2005 The Regents of the University of California.
dnl All rights reserved.
dnl Copyright (c) 2010-2012 Cisco Systems, Inc. All rights reserved.
dnl Copyright (c) 2019 Triad National Security, LLC. All rights
dnl reserved.
dnl $COPYRIGHT$
dnl
dnl Additional copyrights may follow
dnl
dnl $HEADER$
dnl
#
# Sets and AC_SUBST's OMPI_FC_MODULE_FLAG.
#
# OMPI_FORTRAN_FIND_MODULE_INCLUDE_FLAG([action if found], [action if not found]
AC_DEFUN([OMPI_FORTRAN_FIND_MODULE_INCLUDE_FLAG],[
AS_VAR_PUSHDEF([fortran_inc_var], [ompi_cv_fortran_module_include_flag])
OMPI_FC_MODULE_FLAG=
AC_CACHE_CHECK([for Fortran compiler module include flag],
fortran_inc_var,
[ofi_possible_flags="-I -p -M"
mkdir conftest.$$
cd conftest.$$
# Try to compile a Fortran module
mkdir subdir
cd subdir
cat > conftest-module.f90 <<EOF
module OMPI_MOD_FLAG
type OMPI_MOD_FLAG_TYPE
integer :: i
end type OMPI_MOD_FLAG_TYPE
end module OMPI_MOD_FLAG
EOF
OPAL_LOG_COMMAND([$FC $FCFLAGS $FCFLAGS_f90 -c conftest-module.f90 $LDFLAGS $LIBS], ,
[cd ..
rm -rf conftest.$$
AC_MSG_RESULT([Whoops!])
AC_MSG_WARN([*** Cannot seem to compile a Fortran module])
AC_MSG_ERROR([Cannot continue])])
cd ..
#
# Now try to compile a simple program using that module, iterating
# through the possible flags that the compiler might use
#
cat > conftest.f90 <<EOF
program fortranusemodule
use OMPI_MOD_FLAG
end program fortranusemodule
EOF
ofi_module_flag=
for flag in $ofi_possible_flags; do
if test "$ofi_module_flag" = ""; then
OPAL_LOG_COMMAND([$FC $FCFLAGS $FCFLAGS_f90 conftest.f90 ${flag}subdir $LDFLAGS $LIBS],
[ofi_module_flag=$flag],
dnl try and see if we need to link in a possible object file
[OPAL_LOG_COMMAND([$FC $FCFLAGS $FCFLAGS_f90 conftest.f90 subdir/conftest-module.o \
${flag}subdir $LDFLAGS $LIBS],
[ofi_module_flag=$flag])])
fi
done
AS_IF([test -n "$ofi_module_flag"],
[AS_VAR_SET(fortran_inc_var, [$ofi_module_flag])])
cd ..
rm -rf conftest.$$
])
AS_VAR_COPY([OMPI_FC_MODULE_FLAG], [fortran_inc_var])
AC_SUBST(OMPI_FC_MODULE_FLAG)
AS_VAR_POPDEF([fortran_inc_var])
AS_IF([test "$OMPI_FC_MODULE_FLAG" != ""],
[$1], [$2])
])dnl
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