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[svn-r9809] Purpose: bug fix

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Description:  For HP-UX11.00, compiler's casting from 'long double' to most of
integers.  A macro was hard set in config/hpux11.00 before.

Solution:  Let configure detect this case and set the macro.

Platforms tested:  kelgia, fuss, modi4.  These systems are mainly concerned.
This commit is contained in:
Raymond Lu 2005-01-11 16:05:21 -05:00
parent 7b42f786bd
commit 7945e9929e
3 changed files with 85 additions and 11 deletions
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6
config/hpux11.00
View File

@ -97,9 +97,3 @@ case "X-$CXX" in
PROFILE_CPPFLAGS=
;;
esac
# Set flag to avoid conversion from 'long double' to integers because of
# HP-UX's compiler problems. For HP-UX 11.00, the compiler has 'floating exception'
# when converting 'long double' to all integers except 'unsigned long long'.
# Other HP-UX systems are unknown yet. (1/8/05 - SLU)
hdf5_cv_sw_ldouble_to_integer_works=${hdf5_cv_sw_ldouble_to_integer_works='no'}

54
configure vendored
View File

@ -33548,12 +33548,66 @@ else
echo "${ECHO_T}no" >&6
fi
echo "$as_me:$LINENO: checking if accurately converting from long double to integers works" >&5
echo $ECHO_N "checking if accurately converting from long double to integers works... $ECHO_C" >&6
if test "${hdf5_cv_sw_ldouble_to_integer_works+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
if test "$cross_compiling" = yes; then
{ { echo "$as_me:$LINENO: error: cannot run test program while cross compiling" >&5
echo "$as_me: error: cannot run test program while cross compiling" >&2;}
{ (exit 1); exit 1; }; }
else
cat >conftest.$ac_ext <<_ACEOF
#line $LINENO "configure"
#include "confdefs.h"
int main(void)
{
void *align;
long double ld= 9701917572145405952.00L;
unsigned char v1;
short v2;
unsigned int v3;
int ret = 0;
align = (void*)malloc(sizeof(long double));
memcpy(align, &ld, sizeof(long double));
/*For HU-UX11.00, there's floating exception(core dump) when doing some of casting
*from 'long double' to integers*/
v1=(unsigned char)(*((long double*)align));
v2=(short)(*((long double*)align));
v3=(unsigned int)(*((long double*)align));
done:
exit(ret);
}
_ACEOF
rm -f conftest$ac_exeext
if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
(eval $ac_link) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } && { ac_try='./conftest$ac_exeext'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
hdf5_cv_sw_ldouble_to_integer_works=yes
else
echo "$as_me: program exited with status $ac_status" >&5
echo "$as_me: failed program was:" >&5
cat conftest.$ac_ext >&5
( exit $ac_status )
hdf5_cv_sw_ldouble_to_integer_works=no
fi
rm -f core core.* *.core conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
fi
fi

36
configure.in
View File

@ -2509,13 +2509,39 @@ fi
dnl -----------------------------------------------------------------------
dnl Set flag to indicate that the machine can handle conversion from
dnl long double to integers. (This flag should be set "yes" for all
dnl machines except all SGIs and HP-UX 11.00, where some conversions are
dnl long double to integers. This flag should be set "yes" for all
dnl machines except all SGIs and HP-UX 11.00. For SGIs, some conversions are
dnl incorrect and its cache value is set "no" in its config/irix6.x and
dnl irix5.x and config/hpux11.00 files.)
dnl
dnl irix5.x. For HP-UX 11.00, the compiler has 'floating exception'
dnl when converting 'long double' to all integers except 'unsigned long long'.
dnl Other HP-UX systems are unknown yet. (1/8/05 - SLU)
AC_MSG_CHECKING([if accurately converting from long double to integers works])
AC_CACHE_VAL([hdf5_cv_sw_ldouble_to_integer_works], [hdf5_cv_sw_ldouble_to_integer_works=yes])
AC_CACHE_VAL([hdf5_cv_sw_ldouble_to_integer_works],
[AC_TRY_RUN([
int main(void)
{
void *align;
long double ld= 9701917572145405952.00L;
unsigned char v1;
short v2;
unsigned int v3;
int ret = 0;
align = (void*)malloc(sizeof(long double));
memcpy(align, &ld, sizeof(long double));
/*For HU-UX11.00, there's floating exception(core dump) when doing some of casting
*from 'long double' to integers*/
v1=(unsigned char)(*((long double*)align));
v2=(short)(*((long double*)align));
v3=(unsigned int)(*((long double*)align));
done:
exit(ret);
}
], [hdf5_cv_sw_ldouble_to_integer_works=yes], [hdf5_cv_sw_ldouble_to_integer_works=no],)])
if test ${hdf5_cv_sw_ldouble_to_integer_works} = "yes"; then
AC_DEFINE([SW_LDOUBLE_TO_INTEGER_WORKS], [1],