Build system for MEX/Octave: use Octave's LDFLAGS in the configure script

This will facilitate the detection of UMFPACK under Windows

mex/build/octave/configure.ac

@@ -30,6 +30,7 @@ if test "x$MKOCTFILE" != "x"; then
   CFLAGS=`$MKOCTFILE -p CFLAGS`
   FFLAGS=`$MKOCTFILE -p FFLAGS`
   CXXFLAGS=`$MKOCTFILE -p CXXFLAGS`
+  LDFLAGS="`$MKOCTFILE -p LFLAGS` `$MKOCTFILE -p LDFLAGS`"
 fi
 
 CFLAGS="$CFLAGS -Wall -Wno-parentheses"

mex/build/octave/mex.am

@@ -8,10 +8,7 @@ DEFS += -DMEXEXT=\".mex\"
 AM_CFLAGS = $(shell $(MKOCTFILE) -p CPICFLAG)
 AM_FFLAGS = $(shell $(MKOCTFILE) -p FPICFLAG)
 AM_CXXFLAGS = $(shell $(MKOCTFILE) -p CXXPICFLAG)
-
 AM_LDFLAGS = $(shell $(MKOCTFILE) -p DL_LDFLAGS)
-AM_LDFLAGS += $(shell $(MKOCTFILE) -p LFLAGS)
-AM_LDFLAGS += $(shell $(MKOCTFILE) -p LDFLAGS)
 
 LIBS += $(shell $(MKOCTFILE) -p OCTAVE_LIBS)
 LIBS += $(shell $(MKOCTFILE) -p BLAS_LIBS)