Purity: don't look for library dependencies (of the form `-lfoo') in
/lib and /usr/lib.  Likewise, when searching for included Makefiles,
don't look in /usr/include and friends.

Patch from Nixpkgs, by Eelco Dolstra.

diff -rc make-3.81-orig/src/read.c make-3.81/src/read.c
*** make-3.81-orig/src/read.c	2006-03-17 15:24:20.000000000 +0100
--- make-3.81/src/read.c	2007-05-24 17:16:31.000000000 +0200
***************
*** 99,107 ****
--- 99,109 ----
  #endif
      INCLUDEDIR,
  #ifndef _AMIGA
+ #if 0    
      "/usr/gnu/include",
      "/usr/local/include",
      "/usr/include",
+ #endif    
  #endif
      0
    };
diff -rc make-3.81-orig/src/remake.c make-3.81/src/remake.c
*** make-3.81-orig/src/remake.c	2006-03-20 03:36:37.000000000 +0100
--- make-3.81/src/remake.c	2007-05-24 17:06:54.000000000 +0200
***************
*** 1452,1460 ****
--- 1452,1462 ----
    static char *dirs[] =
      {
  #ifndef _AMIGA
+ #if 0
        "/lib",
        "/usr/lib",
  #endif
+ #endif
  #if defined(WINDOWS32) && !defined(LIBDIR)
  /*
   * This is completely up to the user at product install time. Just define
ref='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=da1b69efe4fee72826a0675dee4f17009cd81c73'>refs</a><a class='active' href='/guix/log/build-aux/build-self.scm?showmsg=1'>log</a><a href='/guix/tree/build-aux/build-self.scm?id=da1b69efe4fee72826a0675dee4f17009cd81c73'>tree</a><a href='/guix/commit/build-aux/build-self.scm?id=da1b69efe4fee72826a0675dee4f17009cd81c73'>commit</a><a href='/guix/diff/build-aux/build-self.scm?id=da1b69efe4fee72826a0675dee4f17009cd81c73'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/build-aux/build-self.scm'>
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<div class='path'>path: <a href='/guix/log/?id=da1b69efe4fee72826a0675dee4f17009cd81c73&amp;showmsg=1'>root</a>/<a href='/guix/log/build-aux?id=da1b69efe4fee72826a0675dee4f17009cd81c73&amp;showmsg=1'>build-aux</a>/<a href='/guix/log/build-aux/build-self.scm?id=da1b69efe4fee72826a0675dee4f17009cd81c73&amp;showmsg=1'>build-self.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/build-aux/build-self.scm?id=da1b69efe4fee72826a0675dee4f17009cd81c73'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2021-11-27 00:49:53 +0100'>2021-11-27</span></td><td class='logsubject'><a href='/guix/commit/build-aux/build-self.scm?id=5c1ba739d432397e7107021fd6cb3ec01aecfb64'>build-self: Help users to submit useful bug reports.</a></td><td>Tobias Geerinckx-Rice</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* build-aux/build-self.scm (build): Request the ‘COMPLETE output’.


</td></tr>
<tr class='logheader'><td><span title='2021-04-29 11:24:48 -0400'>2021-04-29</span></td><td class='logsubject'><a href='/guix/commit/build-aux/build-self.scm?id=fbc2a52a32ddc664db8ebab420c2e17b1432c744'>download: Use Disarchive as a last resort.</a></td><td>Timothy Sample</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
This is a fixed version of 66b14dccdd0d83c875ce3a8d50ceab8b6f0a3ce2,
which was reverted in e74250c3c535b75dd2225a26df51febb7ed94654.

* guix/download.scm (%disarchive-mirrors): New variable.
(%disarchive-mirror-file): New variable.
(built-in-download): Add 'disarchive-mirrors' keyword argument and
pass its value along to the 'builtin:download' derivation.
(url-fetch): Pass '%disarchive-mirror-file' to 'built-in-download'.
* guix/scripts/perform-download.scm (perform-download): Read
Disarchive mirrors from the environment and pass them to
'url-fetch'.
* guix/build/download.scm (disarchive-fetch/any): New procedure.
(url-fetch): Add 'disarchive-mirrors' keyword argument, use it to
make a list of URIs, and use the new procedure to fetch the file if
all other methods fail.
* build-aux/build-self.scm (build-program)[select?]: Exclude '(guix
build download)'.
* guix/self.scm (compiled-guix)[*core-modules*]: Add 'guile-json' to
the list of extensions.


</td></tr>
<tr class='logheader'><td><span title='2021-04-01 14:58:55 +0200'>2021-04-01</span></td><td class='logsubject'><a href='/guix/commit/build-aux/build-self.scm?id=a81a19930b2cbe1327e1e82d6210f80846ce2898'>build-self: Take care of the spinner in the parent process.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
This simplifies code and mostly ensures we don't print a spinner while
there's build activity going on.

* build-aux/build-self.scm (build-program): Remove 'spin' and
'call-with-new-thread' call from "compute-guix-derivation" body.  Remove
"Computing Guix derivation" message.
(proxy): Pass extra argument to 'select'.  Display a spinner when
'select' returns empty lists.
(build): Print "Computing Guix derivation" message here.


</td></tr>
<tr class='logheader'><td><span title='2021-04-01 14:58:55 +0200'>2021-04-01</span></td><td class='logsubject'><a href='/guix/commit/build-aux/build-self.scm?id=1c10c2751a9075db5ab70fd102f0cc5ef2375720'>build-self: Forward sub-process build output to (current-build-output-port).</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
Fixes &lt;https://bugs.gnu.org/41930&gt;.

* build-aux/build-self.scm (build-program): Add extra 'build-output'
parameter.  Interpret it as a socket name and connect to it; use it as
the CURRENT-BUILD-OUTPUT-PORT.
(proxy): New procedure.
(build): Open a named socket.  Accept connections and call 'proxy' on it.


</td></tr>
<tr class='logheader'><td><span title='2021-03-19 21:44:36 +0100'>2021-03-19</span></td><td class='logsubject'><a href='/guix/commit/build-aux/build-self.scm?id=ef2b9322fae1d03bf639924d12214b0f58c11054'>build-self: Silent Guile warnings while computing the derivation.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
In particular, silence the Guile-Git autoload warnings introduced by
c1940fde43c7aca37d67589cc5cb248086d17d56.

* build-aux/build-self.scm (build-program): Wrap 'guix-derivation' call
in 'parameterize'.


</td></tr>