61 строка
2.9 KiB
Bash
61 строка
2.9 KiB
Bash
dnl -*- shell-script -*-
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dnl
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dnl Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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dnl University Research and Technology
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dnl Corporation. All rights reserved.
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dnl Copyright (c) 2004-2005 The University of Tennessee and The University
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dnl of Tennessee Research Foundation. All rights
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dnl reserved.
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dnl Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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dnl University of Stuttgart. All rights reserved.
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dnl Copyright (c) 2004-2005 The Regents of the University of California.
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dnl All rights reserved.
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dnl Copyright (c) 2009 Sun Microsystems, Inc. All rights reserved.
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dnl Copyright (c) 2014 Intel, Inc. All rights reserved.
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dnl $COPYRIGHT$
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dnl
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dnl Additional copyrights may follow
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dnl
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dnl $HEADER$
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dnl
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# OPAL_C_GET_ALIGN(type, config_var)
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# ----------------------------------
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# Determine datatype alignment.
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# First arg is type, 2nd arg is config var to define.
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AC_DEFUN([OPAL_C_GET_ALIGNMENT],[
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AC_CACHE_CHECK([alignment of $1],
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[AS_TR_SH([opal_cv_c_align_$1])],
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[AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
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[[
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struct foo { char c; $1 x; };
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struct foo *p = (struct foo *) malloc(sizeof(struct foo));
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int diff;
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FILE *f=fopen("conftestval", "w");
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if (!f) exit(1);
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diff = ((char *)&p->x) - ((char *)&p->c);
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fprintf(f, "%d\n", (diff >= 0) ? diff : -diff);
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]])], [AS_TR_SH([opal_cv_c_align_$1])=`cat conftestval`],
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[AC_MSG_WARN([*** Problem running configure test!])
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AC_MSG_WARN([*** See config.log for details.])
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AC_MSG_ERROR([*** Cannot continue.])],
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[ # cross compile - do a non-executable test. Trick
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# taken from the Autoconf 2.59c. Switch to using
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# AC_CHECK_ALIGNOF when we can require Autoconf 2.60.
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_AC_COMPUTE_INT([(long int) offsetof (opal__type_alignof_, y)],
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[AS_TR_SH([opal_cv_c_align_$1])],
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[AC_INCLUDES_DEFAULT
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#ifndef offsetof
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# define offsetof(type, member) ((char *) &((type *) 0)->member - (char *) 0)
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#endif
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typedef struct { char x; $1 y; } opal__type_alignof_;
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],
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[AC_MSG_WARN([*** Problem running configure test!])
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AC_MSG_WARN([*** See config.log for details.])
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AC_MSG_ERROR([*** Cannot continue.])])])])
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AC_DEFINE_UNQUOTED([$2], [$AS_TR_SH([opal_cv_c_align_$1])], [Alignment of type $1])
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eval "$2=$AS_TR_SH([opal_cv_c_align_$1])"
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rm -rf conftest* ]) dnl
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