diff options
| -rwxr-xr-x | configure | 15 | ||||
| -rw-r--r-- | configure.ac | 25 |
2 files changed, 22 insertions, 18 deletions
@@ -5714,20 +5714,15 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \ fi -if test "$ac_cv_sizeof___float128" != 0; then -## Check if __float128 and c_long_double are the same size and precision - if test "$ac_cv_sizeof___float128" = "$ac_cv_sizeof_long_double" && test "$LDBL_DIG" = "$FLT128_DIG"; then - -$as_echo "#define HAVE_FLOAT128 0" >>confdefs.h - PAC_C_MAX_REAL_PRECISION=$LDBL_DIG - else +## __float seems to work for __float128, but it should be _Quad type instead +if test "$ac_cv_sizeof___float128" != 0 && test "$cc_vendor" = "gcc"; then +## Check if __float128 and c_long_double are the same size and precision $as_echo "#define HAVE_FLOAT128 1" >>confdefs.h - PAC_C_MAX_REAL_PRECISION=$FLT128_DIG - fi -else + PAC_C_MAX_REAL_PRECISION=$FLT128_DIG + else PAC_C_MAX_REAL_PRECISION=$LDBL_DIG fi diff --git a/configure.ac b/configure.ac index 3842734..0279d3c 100644 --- a/configure.ac +++ b/configure.ac @@ -366,17 +366,26 @@ HAVE_FLOAT128=0 HAVE_QUADMATH=0 AC_CHECK_HEADERS([quadmath.h], [HAVE_QUADMATH=1], []) PAC_LDBL_DIG -if test "$ac_cv_sizeof___float128" != 0; then + +## __float seems to work for __float128, but it should be _Quad type instead +if test "$ac_cv_sizeof___float128" != 0 && test "$cc_vendor" = "gcc"; then ## Check if __float128 and c_long_double are the same size and precision - if test "$ac_cv_sizeof___float128" = "$ac_cv_sizeof_long_double" && test "$LDBL_DIG" = "$FLT128_DIG"; then - AC_DEFINE([HAVE_FLOAT128], [0], [Determine if __float128 is available]) - PAC_C_MAX_REAL_PRECISION=$LDBL_DIG - else - AC_DEFINE([HAVE_FLOAT128], [1], [Determine if __float128 is available]) - PAC_C_MAX_REAL_PRECISION=$FLT128_DIG + dnl if test "$ac_cv_sizeof___float128" = "$ac_cv_sizeof_long_double"; then + dnl if test "$LDBL_DIG" = "$FLT128_DIG"; then + dnl AC_DEFINE([HAVE_FLOAT128], [0], [Determine if __float128 is available]) + dnl PAC_C_MAX_REAL_PRECISION=$LDBL_DIG + dnl else + dnl if test "$FLT128_DIG" > "$LDBL_DIG";then + dnl choose the larger precision + AC_DEFINE([HAVE_FLOAT128], [1], [Determine if __float128 is available]) + PAC_C_MAX_REAL_PRECISION=$FLT128_DIG + dnl else + dnl AC_DEFINE([HAVE_FLOAT128], [0], [Determine if __float128 is available]) + dnl PAC_C_MAX_REAL_PRECISION=$LDBL_DIG + dnl fi dnl AC_MSG_CHECKING([for quadmath.h]) dnl AC_MSG_RESULT([$HAVE_QUADMATH]) - fi + dnl fi else PAC_C_MAX_REAL_PRECISION=$LDBL_DIG fi |