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openmpi/config/f90_get_alignment.m4

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dnl -*- shell-script -*-
dnl
dnl Copyright (c) 2004-2005 The Trustees of Indiana University.
dnl All rights reserved.
dnl Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
dnl All rights 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 $COPYRIGHT$
dnl
dnl Additional copyrights may follow
dnl
dnl $HEADER$
dnl
AC_DEFUN([OMPI_F90_GET_ALIGNMENT],[
# Determine FORTRAN datatype size.
# First arg is type, 2nd arg is config var to define.
AC_MSG_CHECKING(alignment of FORTRAN $1)
ompi_ac_align_fn=
if test "x$ompi_ac_doubleunder" = xy || test "x$ompi_ac_singleunder" = xy; then
ompi_ac_align_fn=align_
else
if test "x$ompi_ac_nounder" = xy; then
ompi_ac_align_fn=align
else
if test "x$ompi_ac_caps" = xy; then
ompi_ac_align_fn=ALIGN
else
AC_MSG_WARN([*** FORTRAN external naming convention undefined])
AC_MSG_ERROR([*** Cannot continue.])
fi
fi
fi
#
# Fortran module
#
cat > conftestf.f90 <<EOF
program f90align
type TestAlign
character a
$1 :: x
end type
external ALIGN
type(TestAlign) :: a
call ALIGN(a%a, a%x)
end program
EOF
#
# C module
#
if test -f conftest.h; then
ompi_conftest_h="#include \"conftest.h\""
else
ompi_conftest_h=""
fi
cat > conftest.c <<EOF
#include <stdio.h>
#include <stdlib.h>
$conftest
#ifdef __cplusplus
extern "C" {
#endif
void $ompi_ac_align_fn(char *a, char *x)
{
int diff;
FILE *f=fopen("conftestval", "w");
if (!f) exit(1);
diff = a - x;
fprintf(f, "%d\n", (diff >= 0) ? diff : -diff);
fclose(f);
}
#ifdef __cplusplus
}
#endif
EOF
#
# Try the compilation and run. Can't use AC_TRY_RUN because it's two
# module files.
#
OMPI_LOG_COMMAND([$CC $CFLAGS -I. -c conftest.c],
OMPI_LOG_COMMAND([$FC $FCFLAGS $FCFLAGS_f90 conftestf.f90 conftest.o -o conftest],
OMPI_LOG_COMMAND([./conftest],[HAPPY=1],[HAPPY=0]),
[HAPPY=0]),
[HAPPY=0])
if test "$HAPPY" = "1" -a -f conftestval; then
ompi_ac_align=`cat conftestval`
AC_MSG_RESULT([$ompi_ac_align])
if test -n "$2"; then
eval "$2=$ompi_ac_align"
fi
else
AC_MSG_RESULT([unknown])
OMPI_LOG_MSG([here is the C program:], 1)
OMPI_LOG_FILE([conftest.c])
if test -f conftest.h; then
OMPI_LOG_MSG([here is contest.h:], 1)
OMPI_LOG_FILE([conftest.h])
fi
OMPI_LOG_MSG([here is the fortran program:], 1)
OMPI_LOG_FILE([conftestf.f90])
AC_MSG_WARN([*** Problem running configure test!])
AC_MSG_WARN([*** See config.log for details.])
AC_MSG_ERROR([*** Cannot continue.])
fi
str="$2=$ompi_ac_align"
eval $str
unset ompi_ac_align HAPPY ompi_conftest_h
/bin/rm -f conftest*])dnl