configure.in: Fix detection of Boost libraries. Reported by <plug.gulp@gmail.com>.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12507

diff --git a/configure.in b/configure.in
index b6eb3713b4712151bf677fdb23a73ff8b7784c3e..177e58a1970c16c33ed94b0ab4f1f7941e3d0a88 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -1868,7 +1868,9 @@ AC_MSG_CHECKING([for boost])
 
 AC_LANG(C++)
 safe_CXXFLAGS=$CXXFLAGS
-CXXFLAGS="-lboost_thread-mt $mflag_primary"
+CXXFLAGS="$mflag_primary"
+safe_LIBS="$LIBS"
+LIBS="-lboost_thread-mt $LIBS"
 
 AC_LINK_IFELSE([AC_LANG_SOURCE([
 #include <boost/thread.hpp>
@@ -1890,6 +1892,7 @@ ac_have_boost_1_35=no
 AC_MSG_RESULT([no])
 ])
 
+LIBS="$safe_LIBS"
 CXXFLAGS=$safe_CXXFLAGS
 AC_LANG(C)