Merge pull request #387 from trapexit/cppfind

use compiler's preprocessor rather than cpp explicitly

tools/cppfind

@@ -1,7 +1,8 @@
 #!/bin/sh
 
+CXX="${CXX:-c++}"
 FUSE_CFLAGS="$(pkg-config --cflags fuse) -DFUSE_USE_VERSION=29"
 
-echo "#include <fuse.h>" | cpp ${FUSE_CFLAGS} | grep "${1}" > /dev/null
+echo "#include <fuse.h>" | ${CXX} -E ${FUSE_CFLAGS} - | grep "${1}" > /dev/null
 
 [ "$?" != "0" ]; echo $?