From: Jan Engelhardt <jengelh@inai.de>
Date: 2012-12-06 16:01:44.178343276 +0100

build: resolve failure to run libtool

configure would not detect GLPK's presence if the libtool
call failed, and it does when --tag is not specified.
Happens in libtool < 2.4.

---
 m4/glpk-check.m4 |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: 4ti2-1.3.2/m4/glpk-check.m4
===================================================================
--- 4ti2-1.3.2.orig/m4/glpk-check.m4
+++ 4ti2-1.3.2/m4/glpk-check.m4
@@ -27,7 +27,7 @@ BACKUP_CXXFLAGS=${CXXFLAGS}
 BACKUP_LIBS=${LIBS}
 BACKUP_CXX=${CXX}
 
-CXX="./libtool --mode=link ${CXX}"
+CXX="./libtool --tag=CXX --mode=link ${CXX}"
 
 AC_MSG_CHECKING(for GLPK)