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 b9c3846..7790aab 100644 --- a/configure.in +++ b/configure.in @@ -2734,6 +2734,37 @@ else AC_MSG_RESULT([no]) fi +dnl ---------------------------------------------------------------------- +dnl Set the flag to indicate that the machine can accurately convert +dnl 'long double' to 'unsigned int' values. (This flag should be set for +dnl all machines, except for some Intel compilers on some Linux.) +dnl +AC_MSG_CHECKING([if converting long double to unsigned int values works]) + +AC_CACHE_VAL([hdf5_cv_ldouble_to_uint_works], + [AC_TRY_RUN([ + int main(void) + { + long double ld = 2733248032.9183987530L; + unsigned int i; + int ret = 0; + + i = (unsigned int)ld; + if(i!=2733248032 && i!=2733248031 && i!=2733248033) + ret = 1; + +done: + exit(ret); + } + ], [hdf5_cv_ldouble_to_uint_works=yes], [hdf5_cv_ldouble_to_uint_works=no],)]) + +if test ${hdf5_cv_ldouble_to_uint_works} = "yes"; then + AC_DEFINE([CV_LDOUBLE_TO_UINT_WORKS], [1], + [Define if your system can convert long double to unsigned int values correctly.]) + AC_MSG_RESULT([yes]) +else + AC_MSG_RESULT([no]) +fi dnl ---------------------------------------------------------------------- dnl Set the flag to indicate that the machine can _compile_ |