configure.ac: use $LIBS not $CFLAGS when testing -lpthread

diff --git a/configure.ac b/configure.ac
index b7112542b4b62fbbf0235c923f75803edc149e5c..7b3ade9fc0e9c976f155d6746cb8b8871547cbb1 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1013,7 +1013,12 @@ elif test -z "$PTHREAD_CFLAGS"; then
   # would then trigger compiler warnings on every single file we compile.
   for opt in "" -mt -pthread -lpthread; do
      old_CFLAGS="$CFLAGS"
-     CFLAGS="$opt $CFLAGS"
+     old_LIBS="$LIBS"
+     case "$opt" in
+        -l*)  LIBS="$opt $LIBS" ;;
+        *)    CFLAGS="$opt $CFLAGS" ;;
+     esac
+
      AC_MSG_CHECKING([for POSIX Threads with '$opt'])
      AC_LINK_IFELSE([PTHREADTEST_SRC],
        [AC_MSG_RESULT([yes])
@@ -1025,6 +1030,7 @@ elif test -z "$PTHREAD_CFLAGS"; then
        ],
        [AC_MSG_RESULT([no])])
       CFLAGS="$old_CFLAGS"
+      LIBS="$old_LIBS"
   done
   if test $threads_found != yes; then
     AC_CHECK_LIB([pthread], [pthread_create],