linux-user: xtensa: enable bFLT support

- request bflt support in configure;
- implement custom linux-user/xtensa/target_flat.h that doesn't put envp
  on stack;
- fix #include "target_flat.h" in flatload.c so that it first search for
  arch-customized version of the header.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/configure b/configure
index 18006f0865..2c6b850ac6 100755
--- a/configure
+++ b/configure
@@ -7178,6 +7178,7 @@ case "$target_name" in
   ;;
   xtensa|xtensaeb)
     TARGET_ARCH=xtensa
+    bflt="yes"
     mttcg="yes"
     target_compiler=$cross_cc_xtensa
   ;;