Compiles the makefile at the specified location with 'compiler'.

        :arg dirpath: the full path to the directory where the makefile lives.
        :arg compiler: one of ['ifort', 'gfortran'].
        :arg makename: the name of the make file to compile.

def _compile(self, dirpath, makename, compiler, debug, profile):
        """Compiles the makefile at the specified location with 'compiler'.

        :arg dirpath: the full path to the directory where the makefile lives.
        :arg compiler: one of ['ifort', 'gfortran'].
        :arg makename: the name of the make file to compile.
        """
        from os import path
        options = ""
        if debug:
            options += " DEBUG=true"
        if profile:
            options += " GPROF=true"

        from os import system
        codestr = "cd {}; make -f '{}' F90={} FAM={}" + options
        code = system(codestr.format(dirpath, makename, compiler, compiler[0]))

        #It turns out that the compiler still returns a code of zero, even if the compile
        #failed because the actual compiler didn't fail; it did its job properly. We need to
        #check for the existence of errors in the 'compile.log' file.
        lcount = 0
        errors = []
        log = path.join(dirpath, "compile.log")
        with open(log) as f:
            for line in f:
                lcount += 1
                if lcount > 21 and lcount < 32:
                    errors.append(line)
                elif lcount > 21:
                    break

        if len(errors) > 0:
            #There are 21 lines in the compile.log file when everything runs correctly
            #Overwrite code with a bad exit value since we have some other problems.
            code = 1
            #We want to write the first couple of errors to the console and give them the
            #option to still execute if the compile only generated warnings.
            msg.warn("compile generated some errors or warnings:")
            msg.blank()
            msg.info(''.join(errors))

        return code