On Tue, Oct 4, 2016 at 6:08 PM, Johannes Schindelin <Johannes.Schindelin@xxxxxx> wrote: > As to making NO_REGEX conditional on REG_STARTEND: you are talking about > apples and oranges here. NO_REGEX is a Makefile flag, while REG_STARTEND > is a C preprocessor macro. > > Unless you can convince the rest of the Git developers (you would not > convince me) to simulate autoconf by compiling an executable every time > `make` is run, to determine whether REG_STARTEND is defined, this is a > no-go. But just to clarify, does anyone have any objection to making our configure.ac compile a C program to check for this sort of thing? Because that seems like the easiest solution to this class of problem.