[Qemu-devel] [PATCH] configure: Fix build for some versions of glibc (9pfs)

[Stefan Weil]

Some versions declare open_by_handle_at, but don't define AT_EMPTY_PATH.
Extend the check in configure to test both preconditions.

Signed-off-by: Stefan Weil <address@hidden>
---
 configure |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configure b/configure
index 799ad0f..f737f6c 100755
--- a/configure
+++ b/configure
@@ -2816,7 +2816,11 @@ fi
 open_by_hande_at=no
 cat > $TMPC << EOF
 #include <fcntl.h>
+#if !defined(AT_EMPTY_PATH)
+# error missing definition
+#else
 int main(void) { struct file_handle fh; return open_by_handle_at(0, &fh, 0); }
+#endif
 EOF
 if compile_prog "" "" ; then
     open_by_handle_at=yes
-- 
1.7.10