[RFC PATCH 1/5] bits/dlfcn.h: Declare and describe the dlmopen RTLD_SHARED flag

Vivek Das Mohapatra vivek@collabora.com
Thu Apr 5 17:52:00 GMT 2018

This flag will instruct dlmopen to create a shared object present
in both the main namespace and the selected namespace when set.
 bits/dlfcn.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/bits/dlfcn.h b/bits/dlfcn.h
index b0b129b66b..a96270d499 100644
--- a/bits/dlfcn.h
+++ b/bits/dlfcn.h
@@ -32,6 +32,13 @@
    visible as if the object were linked directly into the program.  */
 #define RTLD_GLOBAL	0x00100
+/* If the following bit is set in the MODE argument to dlmopen
+   then the target object is loaded into the main namespace (if
+   it is not already there) and a shallow copy (clone) is placed
+   in the target namespace: This allows multiple namespaces to
+   share a single instance of a DSO.  */
+#define RTLD_SHARED 0x00080
 /* Unix98 demands the following flag which is the inverse to RTLD_GLOBAL.
    The implementation does this by default and so we can define the
    value to zero.  */

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