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
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<div class='path'>path: <a href='/guix/log/?id=9a2fc8f0c1487209445be4f5f535b17c850f0abe'>root</a>/<a href='/guix/log/tests?id=9a2fc8f0c1487209445be4f5f535b17c850f0abe'>tests</a>/<a href='/guix/log/tests/pypi.scm?id=9a2fc8f0c1487209445be4f5f535b17c850f0abe'>pypi.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/tests/pypi.scm?id=9a2fc8f0c1487209445be4f5f535b17c850f0abe&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-07-25 19:11:36 +0200'>2020-07-25</span></td><td><a href='/guix/commit/tests/pypi.scm?id=6a79eed920fd4914b162461553a8d7e8f5eee324'>utils: Remove compatibility re-export of 'memoize'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-04-27 23:29:40 +0200'>2020-04-27</span></td><td><a href='/guix/commit/tests/pypi.scm?id=5dfe02c60767a633c67f7f6fc9557b54b3c99b63'>tests: Remove trailing commas in JSON tests.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-03-12 11:52:37 +0100'>2020-03-12</span></td><td><a href='/guix/commit/tests/pypi.scm?id=7657e61d6b33fe758fd69355ed53efbd5310743c'>import: pypi: Rewrite to use 'define-json-mapping'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-02 10:08:00 +0900'>2019-07-02</span></td><td><a href='/guix/commit/tests/pypi.scm?id=d514276b93ccf168438bbd2892fbc64d5661106c'>import: pypi: Include optional test inputs as native-inputs.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2019-07-02 10:08:00 +0900'>2019-07-02</span></td><td><a href='/guix/commit/tests/pypi.scm?id=f0190a5dcdc1882e5a058dc7f12bc7ccb166c63d'>import: pypi: Parse wheel METADATA instead of metadata.json.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2019-07-02 10:07:59 +0900'>2019-07-02</span></td><td><a href='/guix/commit/tests/pypi.scm?id=c799ad7276dcc771912f4fc7edca400ea48b8ec2'>import: pypi: Support more types of archives.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2019-07-02 10:07:59 +0900'>2019-07-02</span></td><td><a href='/guix/commit/tests/pypi.scm?id=803fb336d62ea65990e263ce58d8552e04c9c038'>import: pypi: Improve parsing of requirement specifications.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2019-07-02 10:07:59 +0900'>2019-07-02</span></td><td><a href='/guix/commit/tests/pypi.scm?id=c4797121beea74ae93e3ce17677b9e72b8df920d'>import: pypi: Do not parse optional requirements from source.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2019-07-02 10:07:59 +0900'>2019-07-02</span></td><td><a href='/guix/commit/tests/pypi.scm?id=a853acebe1ccdba51ae509cd8a838a954c7c8bd2'>tests: pypi: Mute the output of tar.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2019-07-02 10:07:59 +0900'>2019-07-02</span></td><td><a href='/guix/commit/tests/pypi.scm?id=01589acc5e114e46e314777bc0d60ebfa620e4f8'>import: pypi: Do not consider requirements.txt files.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2018-10-18 23:46:33 -0400'>2018-10-18</span></td><td><a href='/guix/commit/tests/pypi.scm?id=7277d06d8b956263ef1773c5f61e53dc65583ddd'>gnu: Use pypi.org.</a><span class='msg-avail'>...</span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2018-09-04 17:25:11 +0200'>2018-09-04</span></td><td><a href='/guix/commit/tests/pypi.scm?id=ca719424455465fca4b872c371daf2a46de88b33'>Switch to Guile-Gcrypt.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>