diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-opt/configure.ac')
| -rw-r--r-- | sysdeps/ieee754/ldbl-opt/configure.ac | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-opt/configure.ac b/sysdeps/ieee754/ldbl-opt/configure.ac new file mode 100644 index 0000000000..a77fadd1c4 --- /dev/null +++ b/sysdeps/ieee754/ldbl-opt/configure.ac @@ -0,0 +1,19 @@ +sinclude(./aclocal.m4)dnl Autoconf lossage +GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. +# Local configure fragment for sysdeps/ieee754/ldbl-opt/. + +AC_CACHE_CHECK(whether $CC $CFLAGS supports -mlong-double-128, + libc_cv_mlong_double_128, [dnl +save_CFLAGS="$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 |