testzebra: pragma weak: detect systems with weak alias and provide alternative

[mirror_frr.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 405693c9ba5f7e0b97d9c8de6b4a89cc259f23c5..c51a0d3ee3a5da1d572346de255acdf9b7f54e61 100755 (executable)
--- a/configure.ac
+++ b/configure.ac
@@ -1540,6 +1540,22 @@ if test "${enable_capabilities}" != "no"; then
 fi
 AC_SUBST(LIBCAP)
 
+dnl ---------------------------------------------------------------------------
+dnl http://www.gnu.org/software/autoconf-archive/ax_sys_weak_alias.html
+dnl Check for and set one of the following = 1
+dnl   HAVE_SYS_WEAK_ALIAS_ATTRIBUTE
+dnl   HAVE_SYS_WEAK_ALIAS_PRAGMA
+dnl   HAVE_SYS_WEAK_ALIAS_HPSECONDARY
+dnl   HAVE_SYS_WEAK_ALIAS_CRIDUPLICATE
+dnl If any scheme is found, set
+dnl   HAVE_SYS_WEAK_ALIAS=1
+dnl The following variable is set to text value
+dnl   WEAK_ALIAS = "attribute" || "pragma" || "hpsecondary" || "criduplicate" || "no"
+dnl If weak alias can cross object file boundaries
+dnl   WEAK_ALIAS_CROSSFILE = "yes" || "no"
+dnl ---------------------------------------------------------------------------
+AX_SYS_WEAK_ALIAS
+
 dnl ---------------------------
 dnl check for glibc 'backtrace'
 dnl ---------------------------