[PATCH] Add -lpwl to ppllibs.

[Sebastian Pop <sebpop at gmail dot com>]

Hi Ralf,
here is the patch with the changes that you requested:

	* configure.ac: Use AC_CHECK_LIB to check for -lpwl.
	* configure: Regenerated.

This passed regstrap on amd64-linux.  I tested on two different
machines one having and the other one without libpwl.  Ok for trunk?

Thanks,
Sebastian

---
 configure    |   49 +++++++++++++++++++++++++++++++++++++++++++++----
 configure.ac |   10 ++++++----
 2 files changed, 51 insertions(+), 8 deletions(-)

diff --git a/configure b/configure
index ac7db39..38e44fc 100755
--- a/configure
+++ b/configure
@@ -5660,7 +5660,48 @@ fi
 
 
 # Check for PPL
-ppllibs=" -lppl_c -lppl -lgmpxx"
+pwllib=
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for PWL_handle_timeout in -lpwl" >&5
+$as_echo_n "checking for PWL_handle_timeout in -lpwl... " >&6; }
+if test "${ac_cv_lib_pwl_PWL_handle_timeout+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lpwl  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char PWL_handle_timeout ();
+int
+main ()
+{
+return PWL_handle_timeout ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_pwl_PWL_handle_timeout=yes
+else
+  ac_cv_lib_pwl_PWL_handle_timeout=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pwl_PWL_handle_timeout" >&5
+$as_echo "$ac_cv_lib_pwl_PWL_handle_timeout" >&6; }
+if test "x$ac_cv_lib_pwl_PWL_handle_timeout" = x""yes; then :
+  pwllib="-lpwl"
+fi
+
+ppllibs=" -lppl_c -lppl $pwllib -lgmpxx"
 pplinc=
 
 
@@ -5689,7 +5730,7 @@ case $with_ppl in
   "" | yes)
     ;;
   *)
-    ppllibs="-L$with_ppl/lib -lppl_c -lppl -lgmpxx"
+    ppllibs="-L$with_ppl/lib -lppl_c -lppl $pwllib -lgmpxx"
     pplinc="-I$with_ppl/include $pplinc"
     ;;
 esac
@@ -5697,10 +5738,10 @@ if test "x$with_ppl_include" != x; then
   pplinc="-I$with_ppl_include $pplinc"
 fi
 if test "x$with_ppl_lib" != x; then
-  ppllibs="-L$with_ppl_lib -lppl_c -lppl -lgmpxx"
+  ppllibs="-L$with_ppl_lib -lppl_c -lppl $pwllib -lgmpxx"
 fi
 if test "x$with_ppl$with_ppl_include$with_ppl_lib" = x && test -d ${srcdir}/ppl; then
-  ppllibs='-L$$r/$(HOST_SUBDIR)/ppl/interfaces/C/'"$lt_cv_objdir"' -L$$r/$(HOST_SUBDIR)/ppl/src/'"$lt_cv_objdir"' -lppl_c -lppl -lgmpxx '
+  ppllibs='-L$$r/$(HOST_SUBDIR)/ppl/interfaces/C/'"$lt_cv_objdir"' -L$$r/$(HOST_SUBDIR)/ppl/src/'"$lt_cv_objdir"' -lppl_c -lppl '"$pwllib"' -lgmpxx '
   pplinc='-I$$r/$(HOST_SUBDIR)/ppl/src -I$$r/$(HOST_SUBDIR)/ppl/interfaces/C '
   enable_ppl_version_check=no
 fi
diff --git a/configure.ac b/configure.ac
index 9121d65..4adb989 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1621,7 +1621,9 @@ AC_ARG_WITH(boot-ldflags,
 AC_SUBST(poststage1_ldflags)
 
 # Check for PPL
-ppllibs=" -lppl_c -lppl -lgmpxx"
+pwllib=
+AC_CHECK_LIB(pwl,PWL_handle_timeout,[pwllib="-lpwl"])
+ppllibs=" -lppl_c -lppl $pwllib -lgmpxx"
 pplinc=
 
 AC_ARG_WITH(ppl,
@@ -1643,7 +1645,7 @@ case $with_ppl in
   "" | yes)
     ;;
   *)
-    ppllibs="-L$with_ppl/lib -lppl_c -lppl -lgmpxx"
+    ppllibs="-L$with_ppl/lib -lppl_c -lppl $pwllib -lgmpxx"
     pplinc="-I$with_ppl/include $pplinc"
     ;;
 esac
@@ -1651,10 +1653,10 @@ if test "x$with_ppl_include" != x; then
   pplinc="-I$with_ppl_include $pplinc"
 fi
 if test "x$with_ppl_lib" != x; then
-  ppllibs="-L$with_ppl_lib -lppl_c -lppl -lgmpxx"
+  ppllibs="-L$with_ppl_lib -lppl_c -lppl $pwllib -lgmpxx"
 fi
 if test "x$with_ppl$with_ppl_include$with_ppl_lib" = x && test -d ${srcdir}/ppl; then
-  ppllibs='-L$$r/$(HOST_SUBDIR)/ppl/interfaces/C/'"$lt_cv_objdir"' -L$$r/$(HOST_SUBDIR)/ppl/src/'"$lt_cv_objdir"' -lppl_c -lppl -lgmpxx '
+  ppllibs='-L$$r/$(HOST_SUBDIR)/ppl/interfaces/C/'"$lt_cv_objdir"' -L$$r/$(HOST_SUBDIR)/ppl/src/'"$lt_cv_objdir"' -lppl_c -lppl '"$pwllib"' -lgmpxx '
   pplinc='-I$$r/$(HOST_SUBDIR)/ppl/src -I$$r/$(HOST_SUBDIR)/ppl/interfaces/C '
   enable_ppl_version_check=no
 fi
-- 
1.7.1