build: Add new libbsd_symver_weak() macro

We will use it for the reworked md5 deprecation logic.

diff --git a/src/local-link.h b/src/local-link.h
index ebc197f6a570b2056f4b71d398636892be43ae1c..6782d9abefed75422c886db9d1acd79c76ea789a 100644 (file)
--- a/src/local-link.h
+++ b/src/local-link.h
@@ -42,18 +42,29 @@
 #define libbsd_symver_variant(alias, symbol, version) \
        extern __typeof__(symbol) symbol \
                __attribute__((__symver__(#alias "@" #version)))
+
+#define libbsd_symver_weak(alias, symbol, version) \
+       extern __typeof__(symbol) symbol \
+               __attribute__((__symver__(#alias "@" #version), __weak__))
 #  else
 #define libbsd_symver_default(alias, symbol, version) \
        __asm__(".symver " #symbol "," #alias "@@" #version)
 
 #define libbsd_symver_variant(alias, symbol, version) \
        __asm__(".symver " #symbol "," #alias "@" #version)
+
+#define libbsd_symver_weak(alias, symbol, version) \
+       libbsd_symver_variant(alias, symbol, version); \
+       extern __typeof__(symbol) alias \
+               __attribute__((__weak__))
 #  endif
 #else
 #define libbsd_symver_default(alias, symbol, version) \
        extern __typeof__(symbol) alias __attribute__((__alias__(#symbol)))
 
 #define libbsd_symver_variant(alias, symbol, version)
+
+#define libbsd_symver_weak(alias, symbol, version)
 #endif
 
 #endif