better configure check for long double support

This commit is contained in:
Szabolcs Nagy 2017-09-17 15:35:55 +00:00 committed by Rich Felker
parent 23ddab8569
commit 249b621f9e
1 changed files with 2 additions and 3 deletions

5
configure vendored
View File

@ -706,9 +706,8 @@ esac
#
printf "checking whether compiler's long double definition matches float.h... "
echo '#include <float.h>' > "$tmpc"
echo '#if LDBL_MANT_DIG == 53' >> "$tmpc"
echo 'typedef char ldcheck[9-(int)sizeof(long double)];' >> "$tmpc"
echo '#endif' >> "$tmpc"
echo '#define C(m,s) (m==LDBL_MANT_DIG && s==sizeof(long double))' >> "$tmpc"
echo 'typedef char ldcheck[(C(53,8)||C(64,12)||C(64,16)||C(113,16))*2-1];' >> "$tmpc"
if $CC $CFLAGS_C99FSE \
-I$srcdir/arch/$ARCH -I$srcdir/arch/generic -I$srcdir/include \
$CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then