Provide line number info for C programs even when compiling without rtldebug, but strip off the path to the build tree. Let Function.defined return the line number info for the program when it's a C function that doesn't have any line info itself. Rev: src/Makefile.in:1.345 Rev: src/builtin_functions.c:1.468 Rev: src/program.c:1.478 Rev: src/program.h:1.175