[PATCH] libstdc++-v3/include/bits/regex_error.h: Avoid warning with -fno-exceptions.

[Christophe Lyon via Gcc-patches]

When building with -fno-exceptions, __GLIBCXX_THROW_OR_ABORT expands to
abort(), causing warnings:
unused parameter '__ecode'
unused parameter '__what'

This patch adds __attribute__((unused)) to avoid them.

2020-09-11  Torbjörn SVENSSON <torbjorn.svens...@st.com>
        Christophe Lyon  <christophe.l...@linaro.org>

        libstdc++-v3/
        * include/bits/regex_error.h: Avoid warning with -fno-exceptions.
---
 libstdc++-v3/include/bits/regex_error.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libstdc++-v3/include/bits/regex_error.h 
b/libstdc++-v3/include/bits/regex_error.h
index 09e9288..88f3f811 100644
--- a/libstdc++-v3/include/bits/regex_error.h
+++ b/libstdc++-v3/include/bits/regex_error.h
@@ -167,7 +167,8 @@ namespace regex_constants
   __throw_regex_error(regex_constants::error_type __ecode);
 
   inline void
-  __throw_regex_error(regex_constants::error_type __ecode, const char* __what)
+  __throw_regex_error(regex_constants::error_type __ecode 
__attribute__((unused)),
+                     const char* __what__attribute__((unused)))
   { _GLIBCXX_THROW_OR_ABORT(regex_error(__ecode, __what)); }
 
 _GLIBCXX_END_NAMESPACE_VERSION
-- 
2.7.4