edf57b6db3
When building a program foo in-tree, libtool 2.4.6 generates an executable called lt-foo with a wrapper script called foo. This means that argv[0] inside the program is lt-foo rather than foo. This is a problem for dtcodegen, which uses the program name for various purposes including the "generated by" banner and the logfile name. Remove the lt- prefix if present to avoid this.