[bug #35493] Provide access to existing platform type data via a builtin variable

[David Boyce]

URL:
  <http://savannah.gnu.org/bugs/?35493>

                 Summary: Provide access to existing platform type data via a
builtin variable
                 Project: make
            Submitted by: boyski
            Submitted on: Thu 09 Feb 2012 05:08:57 PM GMT
                Severity: 3 - Normal
              Item Group: Enhancement
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: CVS
        Operating System: None
           Fixed Release: None
           Triage Status: None

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Details:

There are thousands of makefiles containing logic like this

uname := $(shell uname -s) # or worse, "="

ifneq (,$(filter Linux,$(uname)))
  LINUX_HOST := 1
else ifneq (,$(filter CYGWIN%,$(uname)))
  CYGWIN_HOST := 1
else ...
endif

This is complicated, duplicative, hard to read, has portability issues due to
relying on a Unix utility, etc. Meanwhile make already contains a variable
"make_host" describing the platform it was built for, and a one-line patch can
make it available within makefiles:

  define_variable_cname ("MAKE_HOST_TYPE", make_host, o_default, 0);

The attached patch also includes documentation.




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File Attachments:


-------------------------------------------------------
Date: Thu 09 Feb 2012 05:08:57 PM GMT  Name: make_host.diff  Size: 2kB   By:
boyski

<http://savannah.gnu.org/bugs/download.php?file_id=25038>

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