diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-opt/configure.in')
| -rw-r--r-- | sysdeps/ieee754/ldbl-opt/configure.in | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/sysdeps/ieee754/ldbl-opt/configure.in b/sysdeps/ieee754/ldbl-opt/configure.in index bc9d29908f..a77fadd1c4 100644 --- a/sysdeps/ieee754/ldbl-opt/configure.in +++ b/sysdeps/ieee754/ldbl-opt/configure.in @@ -4,12 +4,16 @@ GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. AC_CACHE_CHECK(whether $CC $CFLAGS supports -mlong-double-128, libc_cv_mlong_double_128, [dnl -if $CC $CFLAGS -mlong-double-128 -S -xc /dev/null -o /dev/null 2>&1 -then - libc_cv_mlong_double_128=yes -else - libc_cv_mlong_double_128=no -fi]) +save_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -mlong-double-128" +AC_TRY_COMPILE(, [ +#ifndef __LONG_DOUBLE_128__ +# error "compiler did not predefine __LONG_DOUBLE_128__ as expected" +#endif +long double foobar (long double x) { return x; }], + libc_cv_mlong_double_128=yes, + libc_cv_mlong_double_128=no) +CFLAGS="$save_CFLAGS"]) if test "$libc_cv_mlong_double_128" = no; then AC_MSG_ERROR([this configuration requires -mlong-double-128 support]) fi |