[PATCH v2 2/2] newlib/.../getreent.c: Allow to be provided by host and do so for RTEMS

[Joel Sherrill <joel at rtems dot org>]

RTEMS provides the option to have a global or per-thread reentrancy
as part of application configuration. As part of this, RTEMS provides
the implementation of __getreent() as appropriate. Allow the target
to determine if this method is present in libc.a.
---
 newlib/configure.host        | 2 +-
 newlib/libc/reent/getreent.c | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/newlib/configure.host b/newlib/configure.host
index fb3362b..7f397dd 100644
--- a/newlib/configure.host
+++ b/newlib/configure.host
@@ -605,7 +605,7 @@ case "${host}" in
 	default_newlib_io_long_long="yes"
 	default_newlib_io_c99_formats="yes"
 	newlib_cflags="${newlib_cflags} -D_COMPILING_NEWLIB"
-	newlib_cflags="${newlib_cflags} -DCLOCK_PROVIDED -DMALLOC_PROVIDED -DEXIT_PROVIDED -DSIGNAL_PROVIDED -DREENTRANT_SYSCALLS_PROVIDED -DHAVE_NANOSLEEP -DHAVE_BLKSIZE -DHAVE_FCNTL -DHAVE_ASSERT_FUNC"
+newlib_cflags="${newlib_cflags} -DCLOCK_PROVIDED -DMALLOC_PROVIDED -DEXIT_PROVIDED -DSIGNAL_PROVIDED -DGETREENT_PROVIDED -DREENTRANT_SYSCALLS_PROVIDED -DHAVE_NANOSLEEP -DHAVE_BLKSIZE -DHAVE_FCNTL -DHAVE_ASSERT_FUNC"
         # turn off unsupported items in posix directory 
 	newlib_cflags="${newlib_cflags} -D_NO_GETLOGIN -D_NO_GETPWENT -D_NO_GETUT -D_NO_GETPASS -D_NO_SIGSET -D_NO_WORDEXP -D_NO_POPEN -D_NO_POSIX_SPAWN"
 	;;
diff --git a/newlib/libc/reent/getreent.c b/newlib/libc/reent/getreent.c
index 60ae6fb..124abce 100644
--- a/newlib/libc/reent/getreent.c
+++ b/newlib/libc/reent/getreent.c
@@ -1,5 +1,11 @@
 /* default reentrant pointer when multithread enabled */
 
+#ifdef GETREENT_PROVIDED
+
+int _dummy_getreent;
+
+#else
+
 #include <_ansi.h>
 #include <reent.h>
 
@@ -12,3 +18,5 @@ _DEFUN_VOID(__getreent)
 {
   return _impure_ptr;
 }
+
+#endif
-- 
1.8.3.1