diff options
Diffstat (limited to 'newlib/configure.in')
| -rw-r--r-- | newlib/configure.in | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/newlib/configure.in b/newlib/configure.in index 01ca6a3a3..9ff520100 100644 --- a/newlib/configure.in +++ b/newlib/configure.in @@ -395,6 +395,29 @@ if test $libc_cv_initfinit_array = yes; then AC_DEFINE_UNQUOTED(HAVE_INITFINI_ARRAY) fi +AC_CACHE_CHECK(long double equals double, + newlib_ldbl_eq_dbl, [dnl +cat > conftest.c <<EOF +#include <float.h> +#if DBL_MANT_DIG == LDBL_MANT_DIG && LDBL_MIN_EXP == DBL_MIN_EXP && \ + LDBL_MAX_EXP == DBL_MAX_EXP + #define _LDBL_EQ_DBL + #else + #error "LDBL != DBL" +#endif +EOF +if AC_TRY_COMMAND([${CC} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c + -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD]) +then + newlib_ldbl_eq_dbl=yes; +else + newlib_ldbl_eq_dbl=no; +fi +rm -f conftest*]) +if test $newlib_ldbl_eq_dbl = yes; then + AC_DEFINE_UNQUOTED(_LDBL_EQ_DBL) +fi + AC_CONFIG_FILES([Makefile], [if test -n "$CONFIG_FILES"; then unset ac_file |