* sysdeps/unix/sysv/linux/syscalls.list: Add __pipe2 alias.

	* io/pipe2.c: Likewise.
	* sysdeps/unix/sysv/linux/kernel-features.h: Define __ASSUME_PIPE2
	instead of __ASSUME_PACCEPT.
	* include/unistd.h: Declare __have_pipe2.
	* libio/iopopen.c: Implement "e" flag.
	* libio/Makefile (tests): Add tst-popen1.
	* libio/tst-popen1.c: New file.

1 files changed, 2 insertions, 1 deletions

diff --git a/io/pipe2.c b/io/pipe2.c
index a0b8a8b..aa54d17 100644
--- a/io/pipe2.c
+++ b/io/pipe2.c
@@ -25,7 +25,7 @@
    PIPEDES[1] can be read from PIPEDES[0].  Apply FLAGS to the new
    file descriptors.  Returns 0 if successful, -1 if not.  */
 int
-pipe2 (pipedes, flags)
+__pipe2 (pipedes, flags)
      int pipedes[2];
      int flags;
 {
@@ -38,6 +38,7 @@ pipe2 (pipedes, flags)
   __set_errno (ENOSYS);
   return -1;
 }
+weak_alias (__pipe2, pipe2)
 stub_warning (pipe2)
 
 #include <stub-tag.h>