[DTrace-devel] [PATCH 0/5] improve build configurability

[Nick Alcock]

This series improves the build system, letting you override the results
of all Makeconfig tests, making it a tiny bit more likely that cross-
compilation will succeed (though since it is still untested, only a
*bit* more likely), and implementing a configure script so that you
can avoid having to specify Make variable assignments over and
over again.

A couple of possible configurable values are missing, mostly because they're
not in the top-level makefile and thus cannot be overridden by this
mechanism (notably KERNELDIRPREFIX and KERNELDIRSUFFIX): these are revamped
in another series of mine anyway, and can be added to this machinery once
that goes in.

This series is also pushed to
https://github.com/oracle/dtrace-utils nix/review/configury

The dtrace userspace this series applies atop is found at
https://github.com/oracle/dtrace-utils devel

DTrace should work against unmodified upstream kernels now, but some
features work better with a couple of patches and with natively-built CTF. A
kernel tree that does that is here (do a make ctf after building, and a
make ctf_install after make modules_install):
https://github.com/oracle/dtrace-linux-kernel devel/v2/6.6/dtrace

Nick Alcock (5):
  build: overridable configuration variables
  build: get the architecture from gcc -dumpmachine, not uname -m
  build: avoid building config.mk unnecessarily
  build: support make help-overrides and make help-options
  build: add configure script

 GNUmakefile |  90 ++++++++++++++++++-------------
 Makeconfig  | 103 +++++++++++++++++++++++++++---------
 Makeoptions |  19 ++++---
 README.md   |  15 ++++--
 configure   | 149 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 302 insertions(+), 74 deletions(-)
 create mode 100755 configure


base-commit: 347ad8afa3a13135641ea2e6c73692d1743254be
-- 
2.42.0.271.g85384428f1