add hidden visibility support to libeinfo as well

1 files changed, 28 insertions, 0 deletions

diff --git a/src/hidden-visibility.h b/src/hidden-visibility.h
new file mode 100644
index 00000000..bc8d4c4d
--- /dev/null
+++ b/src/hidden-visibility.h
@@ -0,0 +1,28 @@
+/*
+ * hidden-visibility.h
+ * Create hidden internal aliases so we dont have wasteful relocs.
+ * Copyright 2007 Gentoo Foundation
+ * Released under the GPLv2
+ */
+
+#ifndef _HIDDEN_VISIBILITY_H_
+#define _HIDDEN_VISIBILITY_H_
+
+#if defined(__ELF__) && defined(__GNUC__)
+# define __hidden_asmname(name) __hidden_asmname1 (__USER_LABEL_PREFIX__, name)
+# define __hidden_asmname1(prefix, name) __hidden_asmname2(prefix, name)
+# define __hidden_asmname2(prefix, name) #prefix name
+# define __hidden_proto(name, internal) \
+	extern __typeof (name) name __asm__ (__hidden_asmname (#internal)) \
+	__attribute__ ((visibility ("hidden")));
+# define __hidden_ver(local, internal, name) \
+   extern __typeof (name) __EI_##name __asm__(__hidden_asmname (#internal)); \
+   extern __typeof (name) __EI_##name __attribute__((alias (__hidden_asmname1 (,#local))))
+# define hidden_proto(name) __hidden_proto(name, __RC_##name)
+# define hidden_def(name) __hidden_ver(__RC_##name, name, name);
+#else
+# define hidden_proto(name)
+# define hidden_def(name)
+#endif
+
+#endif