diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/configure.ac b/configure.ac index b836611..3842734 100644 --- a/configure.ac +++ b/configure.ac @@ -194,6 +194,7 @@ AC_SUBST([STATIC_SHARED]) AC_SUBST([enable_shared]) AC_SUBST([enable_static]) AC_SUBST([UNAME_INFO]) UNAME_INFO=`uname -a` +AC_SUBST([PAC_C_MAX_REAL_PRECISION]) ## ---------------------------------------------------------------------- ## Some platforms have broken basename, and/or xargs programs. Check @@ -361,14 +362,26 @@ AC_CHECK_SIZEOF([long double], [8]) ## Check for __FLOAT128 extension AC_CHECK_SIZEOF([__float128]) +HAVE_FLOAT128=0 +HAVE_QUADMATH=0 +AC_CHECK_HEADERS([quadmath.h], [HAVE_QUADMATH=1], []) +PAC_LDBL_DIG if test "$ac_cv_sizeof___float128" != 0; then - AC_DEFINE([HAVE_FLOAT128], [1], [Determine if __float128 is available]) - HAVE_QUADMATH=0 - AC_CHECK_HEADERS([quadmath.h], [HAVE_QUADMATH=1], []) +## Check if __float128 and c_long_double are the same size and precision + if test "$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=$FLT128_DIG dnl AC_MSG_CHECKING([for quadmath.h]) dnl AC_MSG_RESULT([$HAVE_QUADMATH]) + fi +else + PAC_C_MAX_REAL_PRECISION=$LDBL_DIG fi - +AC_DEFINE_UNQUOTED([PAC_C_MAX_REAL_PRECISION], $PAC_C_MAX_REAL_PRECISION, [Determine the maximum decimal precision in C]) +AC_MSG_RESULT([$PAC_C_MAX_REAL_PRECISION]) ## ---------------------------------------------------------------------- ## Check if they would like the Fortran interface compiled ## @@ -489,7 +502,6 @@ if test "X$HDF_FORTRAN" = "Xyes"; then AC_SUBST([PAC_FORTRAN_NATIVE_DOUBLE_KIND]) AC_SUBST([PAC_FORTRAN_NATIVE_DOUBLE_SIZEOF]) AC_SUBST([HAVE_Fortran_INTEGER_SIZEOF_16]) - AC_SUBST([PAC_C_MAX_REAL_PRECISION]) AC_SUBST([FORTRAN_HAVE_C_LONG_DOUBLE]) AC_SUBST([FORTRAN_C_LONG_DOUBLE_IS_UNIQUE]) AC_SUBST([FORTRAN_SIZEOF_LONG_DOUBLE]) @@ -601,7 +613,6 @@ if test "X$HDF_FORTRAN" = "Xyes"; then ## Change back to the C language AC_LANG_POP(Fortran) - PAC_LDBL_DIG else FC="no" fi |