glibc 2.27 fix

With glibc 2.27 the memfd_create has been added to the devel libraries.
That's causing the internally defined static function to clash with the
system wide one. This patch addresses that issue on systems with latest
glibc libraries.

Change-Id: I788bf49b23d5b5f1cb1c0374e243d8a429178a71
Signed-off-by: Marco Varlese <[email protected]>
(cherry picked from commit 3f6ede3ab3df9624ba3682d5bc82c4f2aa2e0506)

diff --git a/src/configure.ac b/src/configure.ac
index db6484f..dafb962 100644 (file)
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -227,6 +227,7 @@ PLUGIN_ENABLED(l2e)
 ###############################################################################
 # Dependency checks
 ###############################################################################
+AC_CHECK_FUNC([memfd_create], [AC_DEFINE([HAVE_MEMFD_CREATE], [1], [Define if memfd exists])])
 
 AM_COND_IF([ENABLE_DPDK_SHARED],
 [

diff --git a/src/vppinfra/linux/syscall.h b/src/vppinfra/linux/syscall.h
index f8ec591..4511b85 100644 (file)
--- a/src/vppinfra/linux/syscall.h
+++ b/src/vppinfra/linux/syscall.h
@@ -39,11 +39,13 @@ move_pages (int pid, unsigned long count, void **pages, const int *nodes,
   return syscall (__NR_move_pages, pid, count, pages, nodes, status, flags);
 }
 
+#ifndef HAVE_MEMFD_CREATE
 static inline int
 memfd_create (const char *name, unsigned int flags)
 {
   return syscall (__NR_memfd_create, name, flags);
 }
+#endif
 
 #endif /* included_linux_syscall_h */