[libstdc++] [testsuite] xfail to_chars/long_double on x86-vxworks

Just as on aarch64, x86's wider long double experiences loss of
precision with from_chars implemented in terms of double.  Expect the
execution fail.

for  libstdc++-v3/ChangeLog

	* testsuite/20_util/to_chars/long_double.cc: Expect execution
	fail on x86-vxworks.

diff --git a/libstdc++-v3/testsuite/20_util/to_chars/long_double.cc b/libstdc++-v3/testsuite/20_util/to_chars/long_double.cc
index 263144bd42cba18274eda173352ebdeff4209d09..08363d9d0400318dd8123f30ccb52191a1801758 100644 (file)
--- a/libstdc++-v3/testsuite/20_util/to_chars/long_double.cc
+++ b/libstdc++-v3/testsuite/20_util/to_chars/long_double.cc
@@ -36,7 +36,7 @@
 
 // On systems that use double-precision from_chars for long double,
 // this is expected to fail.
-// { dg-xfail-run-if "from_chars limited to double-precision" { aarch64-*-vxworks* } }
+// { dg-xfail-run-if "from_chars limited to double-precision" { aarch64-*-vxworks* i*86-*-vxworks* } }
 
 // { dg-require-effective-target ieee_floats }
 // { dg-require-effective-target size32plus }