2000-03-27 Roland McGrath <roland@baalperazim.frob.com>

	Locking support for stdio streams with glibc-2.2 libio.  EXPERIMENTAL!
	* lockfile.c: New file.
	* libthreads.map: New file.
	* Makefile (SRCS): Add lockfile.c.
	[$(VERSIONING) = yes] ($(libname).so.$(hurd-version)): Depend
	on $(srcdir)/$(libname).map to get version script into the link.

1 files changed, 19 insertions, 0 deletions

diff --git a/libthreads/libthreads.map b/libthreads/libthreads.map
new file mode 100644
index 00000000..28c85017
--- /dev/null
+++ b/libthreads/libthreads.map
@@ -0,0 +1,19 @@
+/* This is the version script file used for building libthreads.so. -*- C -*-
+   It is in the form of a linker script, to be including as an input
+   file in the link command, rather than with --version-script.  */
+
+  /* We only define these symbols when built against a libio-using libc,
+     which we presume will be 2.2 that is expecting our lockfile.c hooks.
+     For now, the rest of the library's symbols remain unversioned.  */
+
+VERSION
+{
+  GLIBC_2.2
+    {
+    global:
+      _IO_flockfile; _IO_funlockfile; _IO_ftrylockfile;
+      flockfile; funlockfile; ftrylockfile;
+    local:
+      _cthreads_flockfile; _cthreads_funlockfile; _cthreads_ftrylockfile;
+    };
+};