Makefile.am, yassl.m4:

  Enable automake to determine dependency on yaSSL, by explicitly
  listing the .la files in Makefile.am, instead of using
  'yassl_libs_with_path', bug#18273

config/ac-macros/yassl.m4

@@ -17,7 +17,6 @@ AC_DEFUN([MYSQL_CHECK_YASSL], [
     yassl_dir="extra/yassl"
     yassl_libs="-L\$(top_srcdir)/extra/yassl/src -lyassl -L\$(top_srcdir)/extra/yassl/taocrypt/src -ltaocrypt"
     yassl_includes="-I\$(top_srcdir)/extra/yassl/include"
-    yassl_libs_with_path="\$(top_srcdir)/extra/yassl/src/libyassl.la \$(top_srcdir)/extra/yassl/taocrypt/src/libtaocrypt.la"
     AC_DEFINE([HAVE_OPENSSL], [1], [Defined by configure. Using yaSSL for OpenSSL emulation.])
     AC_DEFINE([HAVE_YASSL], [1], [Defined by configure. Using yaSSL for OpenSSL emulation.])
     # System specific checks
@@ -38,7 +37,6 @@ AC_DEFUN([MYSQL_CHECK_YASSL], [
     AC_MSG_RESULT(no)
   fi
   AC_SUBST(yassl_libs)
-  AC_SUBST(yassl_libs_with_path)
   AC_SUBST(yassl_includes)
   AC_SUBST(yassl_dir)
   AM_CONDITIONAL([HAVE_YASSL], [ test "with_yassl" = "yes" ])

libmysql/Makefile.am

@@ -29,7 +29,11 @@ INCLUDES =	-I$(top_builddir)/include -I$(top_srcdir)/include \
 include $(srcdir)/Makefile.shared
 
 libmysqlclient_la_SOURCES = $(target_sources)
-libmysqlclient_la_LIBADD = $(target_libadd) $(yassl_libs_with_path)
+libmysqlclient_la_LIBADD = $(target_libadd)
+if HAVE_YASSL
+libmysqlclient_la_LIBADD+= $(top_srcdir)/extra/yassl/src/libyassl.la \
+			   $(top_srcdir)/extra/yassl/taocrypt/src/libtaocrypt.la
+endif
 libmysqlclient_la_LDFLAGS = $(target_ldflags)
 EXTRA_DIST = Makefile.shared libmysql.def
 noinst_HEADERS = client_settings.h

libmysql_r/Makefile.am

@@ -32,7 +32,11 @@ include $(top_srcdir)/libmysql/Makefile.shared
 libmysql_dir = $(top_srcdir)/libmysql
 
 libmysqlclient_r_la_SOURCES = $(target_sources)
-libmysqlclient_r_la_LIBADD = $(target_libadd) $(yassl_libs_with_path)
+libmysqlclient_r_la_LIBADD = $(target_libadd)
+if HAVE_YASSL
+libmysqlclient_r_la_LIBADD+= $(top_srcdir)/extra/yassl/src/libyassl.la \
+			     $(top_srcdir)/extra/yassl/taocrypt/src/libtaocrypt.la
+endif
 libmysqlclient_r_la_LDFLAGS = $(target_ldflags)
 
 # This is called from the toplevel makefile