diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/configure.in b/configure.in index 3349078..6b3e08c 100644 --- a/configure.in +++ b/configure.in @@ -2757,6 +2757,37 @@ else fi dnl ---------------------------------------------------------------------- +dnl Set the flag to indicate that the machine can handle overflow converting +dnl all floating-point to all integer types. +dnl (This flag should be set for all machines, except for Cray X1 where +dnl floating exception is generated when the floating-point value is greater +dnl than the maximal integer value). +dnl +AC_MSG_CHECKING([if overflows normally converting floating-point to integer values]) + +AC_CACHE_VAL([hdf5_cv_fp_to_integer_overflow_works], + [AC_TRY_RUN([ + int main(void) + { + float f = 2147483648.0f; + int i; + + i = (int)f; + +done: + exit(0); + } + ], [hdf5_cv_fp_to_integer_overflow_works=yes], [hdf5_cv_fp_to_integer_overflow_works=no],)]) + +if test ${hdf5_cv_fp_to_integer_overflow_works} = "yes"; then + AC_DEFINE([FP_TO_INTEGER_OVERFLOW_WORKS], [1], + [Define if your system can handle overflow converting floating-point to integer values.]) + AC_MSG_RESULT([yes]) +else + AC_MSG_RESULT([no]) +fi + +dnl ---------------------------------------------------------------------- dnl Set some variables for general configuration information to be saved dnl and installed with the libraries. dnl |