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Re:R3 – High-performance URL router library in C by q3k on Thursday May 22, 2014 @10:45PM (#7787747)
You do if your custom shell scripts do not allow some of these not-so-standard features (that autotools and other mature build systems provide):

- cross-compiling

- extra flags (ie. for hardening) for various commands

- non-standard install location

- non-standard compiler location

- skipping/adding steps (strip/nostrip)

...

Re:R3 – High-performance URL router library in C by nwmcsween on Wednesday May 28, 2014 @02:25PM (#7811920)
Almost all of those are not part of a 'configure' check when you pass cflags, cc, prefix its just passed to make Cross compiler working have no place in a build system.