When possible, use $(INSTALL).  This allows us to use the functionality within
install for setting directory / file permissions, a requirement for unprivileged
installation.

Also move any directory we plan to create within the installdirs macro. Plus
various other formatting issues.

(issue #17436)
Reported by: pabelanger
Patches:
      non-root.patch.v8 uploaded by pabelanger (license 224)
Tested by: pabelanger

Review: https://reviewboard.asterisk.org/r/654/


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  r207647 | kpfleming | 2009-07-21 08:04:44 -0500 (Tue, 21 Jul 2009) | 12 lines
  
  Ensure that user-provided CFLAGS and LDFLAGS are honored.
  
  This commit changes the build system so that user-provided flags (in ASTCFLAGS
  and ASTLDFLAGS) are supplied to the compiler/linker *after* all flags provided
  by the build system itself, so that the user can effectively override the
  build system's flags if desired. In addition, ASTCFLAGS and ASTLDFLAGS can now
  be provided *either* in the environment before running 'make', or as variable
  assignments on the 'make' command line. As a result, the use of COPTS and LDOPTS
  is no longer necessary, so they are no longer documented, but are still supported
  so as not to break existing build systems that supply them when building Asterisk.
........


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  r187300 | tilghman | 2009-04-08 23:31:38 -0500 (Wed, 08 Apr 2009) | 3 lines
  
  Add debugging mode for diagnosing file descriptor leaks.
  (Related to issue #14625)
........
  r187301 | tilghman | 2009-04-08 23:32:40 -0500 (Wed, 08 Apr 2009) | 2 lines
  
  Oops, missed this file in the last commit.
........


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  r159476 | kpfleming | 2008-11-26 12:36:24 -0600 (Wed, 26 Nov 2008) | 7 lines
  
  simplify (and slightly bug-fix) the recent developer-oriented COMPILE_DOUBLE mode
  
  ensure that 'make clean' removes dependency files for .i files that are created in COMPILE_DOUBLE mode
........


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bring over all the fixes for the warnings found by gcc 4.3.x from the 1.4 branch, and add the ones needed for all the new code here too



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r48525 | kpfleming | 2006-12-16 15:14:34 -0600 (Sat, 16 Dec 2006) | 2 lines

simplify dependency tracking system, using the compiler's built-in method for generating them, and only doing dependency tracking if developer mode is enabled via the configure script

........


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Something is wrong in the agi directory. Asking for autoconfig.h.
I have it disabled locally, but no reason to commit that change.


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r44055 | kpfleming | 2006-09-29 17:47:40 -0500 (Fri, 29 Sep 2006) | 2 lines

fix a few build system bugs, and convert Makefiles to be compatible with GNU make 3.80

........


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Every OS uses strcompat now - this was done on purpose.


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use LDFLAGS and LIBS properly, and allow dependencies to provide LDFLAGS if needed (although none do today)


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make the build output less noisy (optional, can be controlled by the NOISY_BUILD variable in the top-level Makefile)


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  subdirectory instead of a for loop
- remove the FORCE target from the main Makefile and add the couple places
  I used it to the .PHONY target.  .PHONY does the same thing and is a built-in
  more efficient way of doing it.
- add a bunch more targets to .PHONY ...


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- use separate targets instead of a for loop for doing 'make depend' for
  each sub directory


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- add a copyright header to the build_tools Makefile
- remove 'depend' from the 'all' target in agi/ and utils/ since it is handled
  by the main Makefile already


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since they are targets that do not have resulting files and are never listed
as prerequisites to real targets.  Using .PHONY in this manner improves make
performance by never having to check for resulting files.


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Thanks to the fine work of Russell Bryant and Dancho Lazarov, we now have autoconf and menuselect tools for Asterisk!



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already in the top level Makefile



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ensure that dependencies are rebuilt after 'make update' so that builds don't break when files are removed/renamed


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bug 6177


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clean up Makefile headers


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