2004-02-13 22:15:51 +03:00
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dnl -*- shell-script -*-
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dnl
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dnl $HEADER$
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dnl
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AC_DEFUN([LAM_F77_GET_ALIGNMENT],[
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# Determine FORTRAN datatype size.
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# First arg is type, 2nd arg is config var to define.
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AC_MSG_CHECKING(alignment of FORTRAN $1)
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lam_ac_align_fn=
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if test "x$lam_ac_doubleunder" = xy || test "x$lam_ac_singleunder" = xy; then
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lam_ac_align_fn=align_
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else
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if test "x$lam_ac_nounder" = xy; then
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lam_ac_align_fn=align
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else
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if test "x$lam_ac_caps" = xy; then
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lam_ac_align_fn=ALIGN
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else
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AC_MSG_WARN([*** FORTRAN external naming convention undefined])
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AC_MSG_ERROR([*** Cannot continue.])
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fi
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fi
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fi
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#
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# Fortran module
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#
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cat > conftestf.f <<EOF
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program falign
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external ALIGN
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$1 w,x,y,z
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CHARACTER a,b,c
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common /foo/a,w,b,x,y,c,z
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call ALIGN(w,x,y,z)
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end
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EOF
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#
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# C module
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#
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if test -f conftest.h; then
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lam_conftest_h="#include \"conftest.h\""
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else
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lam_conftest_h=""
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fi
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cat > conftest.c <<EOF
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#include <stdio.h>
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#include <stdlib.h>
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$conftest
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#ifdef __cplusplus
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extern "C" {
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#endif
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void $lam_ac_align_fn(char *w, char *x, char *y, char *z)
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{ unsigned long aw, ax, ay, az;
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FILE *f=fopen("conftestval", "w");
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if (!f) exit(1);
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aw = (unsigned long) w;
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ax = (unsigned long) x;
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ay = (unsigned long) y;
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az = (unsigned long) z;
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if (! ((aw%16)||(ax%16)||(ay%16)||(az%16))) fprintf(f, "%d\n", 16);
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else if (! ((aw%12)||(ax%12)||(ay%12)||(az%12))) fprintf(f, "%d\n", 12);
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else if (! ((aw%8)||(ax%8)||(ay%8)||(az%8))) fprintf(f, "%d\n", 8);
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else if (! ((aw%4)||(ax%4)||(ay%4)||(az%4))) fprintf(f, "%d\n", 4);
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else if (! ((aw%2)||(ax%2)||(ay%2)||(az%2))) fprintf(f, "%d\n", 2);
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else fprintf(f, "%d\n", 1);
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fclose(f);
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}
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#ifdef __cplusplus
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}
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#endif
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EOF
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#
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# Try the compilation and run. Can't use AC_TRY_RUN because it's two
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# module files.
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#
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LAM_LOG_COMMAND([$CC $CFLAGS -I. -c conftest.c],
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LAM_LOG_COMMAND([$F77 $FFLAGS conftestf.f conftest.o -o conftest],
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LAM_LOG_COMMAND([./conftest],[HAPPY=1],[HAPPY=0]),
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[HAPPY=0]),
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[HAPPY=0])
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if test "$HAPPY" = "1" -a -f conftestval; then
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lam_ac_align=`cat conftestval`
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AC_MSG_RESULT([$lam_ac_align])
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if test -n "$2"; then
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eval "$2=$lam_ac_align"
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fi
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else
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AC_MSG_RESULT([unknown])
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LAM_LOG_MSG([here is the C program:], 1)
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LAM_LOG_FILE([conftest.c])
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if test -f conftest.h; then
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LAM_LOG_MSG([here is contest.h:], 1)
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LAM_LOG_FILE([conftest.h])
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fi
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LAM_LOG_MSG([here is the fortran program:], 1)
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LAM_LOG_FILE([conftestf.f])
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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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fi
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2004-03-17 02:54:51 +03:00
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str="$2=$lam_ac_align"
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eval $str
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2004-02-13 22:15:51 +03:00
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unset lam_ac_align HAPPY lam_conftest_h
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/bin/rm -f conftest*])dnl
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