added check for bgq l1 prefetch library.

m4/Makefile.am

-M4FILES = dune-fem-dg.m4
+M4FILES = dune-fem-dg.m4 bgq_l1prefetch.m4
 
 aclocaldir = $(datadir)/aclocal
 aclocal_DATA = $(M4FILES)

m4/bgq_l1prefetch.m4

+# searches for bgq_l1prefetch-headers and libs
+
+AC_DEFUN([DUNE_PATH_BGQ_L1PREFETCH],[
+  AC_REQUIRE([AC_PROG_CC])
+
+  AC_ARG_WITH(bgq_l1prefetch,
+    AC_HELP_STRING([--with-bgq_l1prefetch=PATH],[directory with BGQ_L1PREFETCH inside]))
+
+# store old values
+ac_save_LDFLAGS="$LDFLAGS"
+ac_save_CPPFLAGS="$CPPFLAGS"
+ac_save_LIBS="$LIBS"
+
+BGQ_L1PREFETCHYES=0
+## do nothing if no --with-bgq_l1prefetch was supplied
+if test x$with_bgq_l1prefetch != x && test x$with_bgq_l1prefetch != xno ; then
+  BGQ_L1PREFETCHYES=1
+fi
+
+if test x$BGQ_L1PREFETCHYES = x1 ; then
+
+  # is --with-bgq_l1prefetch=bla used?
+  if test "x$with_bgq_l1prefetch" != x ; then
+    BGQ_L1PREFETCHROOT=`cd $with_bgq_l1prefetch && pwd`
+	  if ! test -d $BGQ_L1PREFETCHROOT;  then
+      AC_MSG_WARN([BGQ_L1PREFETCH directory $with_bgq_l1prefetch does not exist])
+  	fi
+
+    if test "x$BGQ_L1PREFETCHROOT" = x; then
+      # use some default value...
+      BGQ_L1PREFETCHROOT="/usr/local/bgq_l1prefetch"
+    fi
+
+    BGQ_L1PREFETCH_LIB_PATH="$BGQ_L1PREFETCHROOT/lib"
+    BGQ_L1PREFETCH_INCLUDE_PATH="$BGQ_L1PREFETCHROOT/include"
+  fi
+
+  # set variables so that tests can use them
+  REM_CPPFLAGS=$CPPFLAGS
+
+  LDFLAGS="$LDFLAGS -L$BGQ_L1PREFETCH_LIB_PATH"
+  BGQ_L1PREFETCH_INC_FLAG="-I$BGQ_L1PREFETCH_INCLUDE_PATH -DENABLE_BGQ_L1PREFETCH=1"
+  CPPFLAGS="$CPPFLAGS $BGQ_L1PREFETCH_INC_FLAG"
+
+  # check for header
+  AC_LANG_PUSH([C])
+  AC_CHECK_HEADERS([l1p/pprefetch.h], 
+     [BGQ_L1PREFETCH_CPPFLAGS="$BGQ_L1PREFETCH_INC_FLAG"
+    HAVE_BGQ_L1PREFETCH="1"],
+    AC_MSG_WARN([pprefetch.h not found in $BGQ_L1PREFETCH_INCLUDE_PATH]))
+   
+  CPPFLAGS="$REM_CPPFLAGS"
+  REM_CPPFLAGS=
+
+  REM_LDFLAGS=$LDFLAGS
+
+  # if header is found...
+  if test x$HAVE_BGQ_L1PREFETCH = x1 ; then
+    LIBNAME="SPI_l1p"
+    AC_CHECK_LIB($LIBNAME,[BGQ_L1PREFETCH_flops],
+    [BGQ_L1PREFETCH_LIBS="-l$LIBNAME"
+           BGQ_L1PREFETCH_LDFLAGS="-L$BGQ_L1PREFETCH_LIB_PATH"],
+	  [HAVE_BGQ_L1PREFETCH="0"
+	  AC_MSG_WARN(lib$LIBNAME not found!)])
+  fi
+
+  LDFLAGS=$REM_LDFLAGS
+  AC_LANG_POP
+fi
+
+# survived all tests?
+if test x$HAVE_BGQ_L1PREFETCH = x1 ; then
+  AC_SUBST(BGQ_L1PREFETCH_LIBS, $BGQ_L1PREFETCH_LIBS)
+  AC_SUBST(BGQ_L1PREFETCH_LDFLAGS, $BGQ_L1PREFETCH_LDFLAGS)
+  AC_SUBST(BGQ_L1PREFETCH_CPPFLAGS, $BGQ_L1PREFETCH_CPPFLAGS)
+  AC_DEFINE(HAVE_BGQ_L1PREFETCH, ENABLE_BGQ_L1PREFETCH,
+    [This is only true if bgq_l1prefetch-library was found by configure 
+     _and_ if the application uses the BGQ_L1PREFETCH_CPPFLAGS])
+
+  # add to global list
+  DUNE_ADD_ALL_PKG([BGQ_L1PREFETCH], [\${BGQ_L1PREFETCH_CPPFLAGS}],
+                   [\${BGQ_L1PREFETCH_LDFLAGS}], [\${BGQ_L1PREFETCH_LIBS}])
+
+  # set variable for summary
+  with_bgq_l1prefetch="yes"
+
+else
+  AC_SUBST(BGQ_L1PREFETCH_LIBS, "")
+  AC_SUBST(BGQ_L1PREFETCH_LDFLAGS, "")
+  AC_SUBST(BGQ_L1PREFETCH_CPPFLAGS, "")
+
+  # set variable for summary
+  with_bgq_l1prefetch="no"
+fi
+  
+# also tell automake
+AM_CONDITIONAL(BGQ_L1PREFETCH, test x$HAVE_BGQ_L1PREFETCH = x1)
+
+# reset old values
+LIBS="$ac_save_LIBS"
+CPPFLAGS="$ac_save_CPPFLAGS"
+LDFLAGS="$ac_save_LDFLAGS"
+
+DUNE_ADD_SUMMARY_ENTRY([BGQ_L1PREFETCH],[$with_bgq_l1prefetch])
+])

m4/dune-fem-dg.m4

@@ -6,7 +6,9 @@ dnl -*- autoconf -*-
 # Additional checks needed to build dune-fem-dg
 # This macro should be invoked by every module which depends on dune-fem-dg, as
 # well as by dune-fem-dg itself
-AC_DEFUN([DUNE_FEM_DG_CHECKS])
+AC_DEFUN([DUNE_FEM_DG_CHECKS],[
+  AC_REQUIRE([DUNE_PATH_BGQ_L1PREFETCH])
+])
 
 # Additional checks needed to find dune-fem-dg
 # This macro should be invoked by every module which depends on dune-fem-dg, but