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configury: try if -fpp flag is needed to preprocess .F90 files #7584

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Apr 1, 2020
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configury: try if -fpp flag is needed to preprocess .F90 files #7584

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22 changes: 20 additions & 2 deletions config/ompi_setup_fc.m4
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Original file line number Diff line number Diff line change
Expand Up @@ -14,8 +14,8 @@ dnl Copyright (c) 2007 Los Alamos National Security, LLC. All rights
dnl reserved.
dnl Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
dnl Copyright (c) 2009-2014 Cisco Systems, Inc. All rights reserved.
dnl Copyright (c) 2015-2016 Research Organization for Information Science
dnl and Technology (RIST). All rights reserved.
dnl Copyright (c) 2015-2020 Research Organization for Information Science
dnl and Technology (RIST). All rights reserved.
dnl $COPYRIGHT$
dnl
dnl Additional copyrights may follow
Expand Down Expand Up @@ -139,6 +139,24 @@ AC_DEFUN([OMPI_SETUP_FC],[
[AC_FC_SRCEXT(f)
AC_FC_SRCEXT(f90)])

AC_MSG_CHECKING([if Fortran compilers preprocess .F90 files without additional flag])
cat > conftest_f.F90 << EOF
#if 0
#error The source file was not preprocessed
#endif
program bogus
end program
EOF
OPAL_LOG_COMMAND([$FC $FCFLAGS -c conftest_f.F90],
[AC_MSG_RESULT(["yes"])],
[AC_MSG_CHECKING([if -fpp flag works])
OPAL_LOG_COMMAND([$FC $FCFLAGS -fpp -c conftest_f.F90],
[AC_MSG_RESULT(["yes"])
FCFLAGS="$FCFLAGS -fpp"],
[AC_MSG_RESULT("no")
AC_MSG_ERROR(["cannot preprocess Fortran files, Aborting"])])])
rm -f conftest*

# Per trac #1982, on OS X, we may need some esoteric linker flags
# in the wrapper compilers. However, per
# https://github.com/open-mpi/ompi/issues/259, we need to use
Expand Down