configure: do not add CUDA_LIB immediately to LIBS

see the commit 085b6e6 (today)

autoconf generally dislikes spaces inside paths, which is true for CUDA
in MSW (path to CUDA libs is something like `-L"/c/Program Files/NVIDIA
GPU Computing Toolkit/CUDA/v11.8/lib"`), so do not use it for tests but
add it just when linking.

Makefile.in

@@ -30,7 +30,7 @@ CXXFLAGS      = @CXXFLAGS@ $(COMMON_FLAGS) -D_GNU_SOURCE
 MKDIR_P       = $(COND_SILENCE)mkdir -p
 CUDA_FLAGS    = @CUDA_FLAGS@ @CUDA_COMPUTE_ARGS@ @DEFS@ -g
 LDFLAGS      =  @LDFLAGS@
-LIBS         += @LIBS@ @MATHLIBS@ -lm -pthread
+LIBS         += @LIBS@ @CUDA_LIB@ @MATHLIBS@ -lm -pthread
 INC           = -Isrc -I$(srcdir)/src -I$(srcdir)/test \
                 @INC@
 CUDA_INC      = @CUDA_INC@ -Isrc -I$(srcdir)/src

configure.ac

@@ -584,7 +584,6 @@ fi
 if test "$FOUND_CUDA" = yes; then
           AC_DEFINE([HAVE_CUDA], [1], [CUDA is present on the system])
           OBJS="$OBJS src/cuda_wrapper.o"
-          LIBS="$LIBS $CUDA_LIB"
           if test $system != Windows; then
                   POST_COMPILE_MSG="$POST_COMPILE_MSG\n***\nYou have compiled in sort of CUDA code.\nIn order to use use it compression and \
 decompression, you will need to have CUDA libraries visible to your OS.\n\
@@ -608,6 +607,7 @@ fi
 ENSURE_FEATURE_PRESENT([$cuda_req], [$FOUND_CUDA], [CUDA not found])
 
 AC_SUBST(CUDA_INC)
+AC_SUBST(CUDA_LIB)
 AC_SUBST(CUDA_COMPILER)
 AC_SUBST(CUDA_COMPUTE_ARGS)