[PATCH] libstdc++: respect with-{headers, newlib} for default hosted value

[Arsen Arsenović via Gcc-patches]

This saves us a build flag when building for freestanding targets.

libstdc++-v3/ChangeLog:

        * acinclude.m4: Default hosted to off if building without
        headers and without newlib.
---
Tested for x86_64-elf.

 libstdc++-v3/acinclude.m4 | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index 719eab15c77..8f4e901c909 100644
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -2982,7 +2982,10 @@ AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
            enable_hosted_libstdcxx=no
            ;;
        *)
-           enable_hosted_libstdcxx=yes
+           case "${with_newlib}-${with_headers}" in
+           no-no) enable_hosted_libstdcxx=no ;;
+           *) enable_hosted_libstdcxx=yes ;;
+           esac
            ;;
      esac])
 
-- 
2.38.0