Compiledb parse shell redirect files as if they where gcc arguments

[f-michaut]

I have a Makefile with a build rule similar to this one :

%.o: %.cpp
    $(CC) -o $@ -c $< $(LDFLAGS) $(CFLAGS) 2>>errors_build.txt

I redirect the error output from g++ to a file for parsing purpose by custom tools.

When I invoke compiledb on this Makefile, I end up with someting like the following :

....
 {
  "directory": "/home/bar/foo",
  "arguments": [
   "g++",
   "-o",
   "build/file.o",
   "-c",
   "source/file.cpp",
   "-W",
   "-Wall",
   "-Werror",
   "-Wextra",
   "-I",
   "./include",
   "errors_build.txt"
  ],
  "file": "source/file.cpp"
 },
....

As you can see, the file where the error output from g++ is redirected is added to the argument list.
When my linter call g++ with this argument list, it will obviously get errors.
Since the 'error_build.txt' file isn't really part of the g++ argument list, I was expecting that compiledb wouldn't list it.