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-rw-r--r--configure.ac24
1 files changed, 24 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 6b591ae..4f37bd4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2970,6 +2970,30 @@ else
fi
## ----------------------------------------------------------------------
+## Set the flag to indicate that the machine is IBM ppc64le and cannot
+## accurately convert some long double values.
+##
+AC_MSG_CHECKING([if the system is IBM ppc64le and cannot correctly convert some long double values])
+
+TEST_SRC="`(echo \"#define H5_DISABLE_SOME_LDOUBLE_CONV_TEST 1\"; cat $srcdir/config/cmake/ConversionTests.c)`"
+
+if test ${ac_cv_sizeof_long_double} = 0; then
+ hdf5_cv_disable_some_ldouble_conv=${hdf5_cv_disable_some_ldouble_conv=no}
+else
+ AC_CACHE_VAL([hdf5_cv_disable_some_ldouble_conv],
+ [AC_RUN_IFELSE([AC_LANG_SOURCE([$TEST_SRC])],
+ [hdf5_cv_disable_some_ldouble_conv=yes], [hdf5_cv_disable_some_ldouble_conv=no],[])])
+fi
+
+if test ${hdf5_cv_disable_some_ldouble_conv} = "yes"; then
+ AC_DEFINE([DISABLE_SOME_LDOUBLE_CONV], [1],
+ [Define if your system is IBM ppc64le and cannot convert some long double values correctly.])
+ AC_MSG_RESULT([yes])
+else
+ AC_MSG_RESULT([no])
+fi
+
+## ----------------------------------------------------------------------
## Set some variables for general configuration information to be saved
## and installed with the libraries (used to generate libhdf5.settings).
##