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/read.c make-3.81/read.c
*** make-3.81-orig/read.c	2006-03-17 15:24:20.000000000 +0100
--- make-3.81/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/remake.c make-3.81/remake.c
*** make-3.81-orig/remake.c	2006-03-20 03:36:37.000000000 +0100
--- make-3.81/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
t</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=f958d8f062f4f5fa40a5646a59dcb0d67432ad09'>refs</a><a class='active' href='/guix/log/nix/libstore/store-api.cc'>log</a><a href='/guix/tree/nix/libstore/store-api.cc?id=f958d8f062f4f5fa40a5646a59dcb0d67432ad09'>tree</a><a href='/guix/commit/nix/libstore/store-api.cc?id=f958d8f062f4f5fa40a5646a59dcb0d67432ad09'>commit</a><a href='/guix/diff/nix/libstore/store-api.cc?id=f958d8f062f4f5fa40a5646a59dcb0d67432ad09'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/nix/libstore/store-api.cc'>
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<div class='path'>path: <a href='/guix/log/?id=f958d8f062f4f5fa40a5646a59dcb0d67432ad09'>root</a>/<a href='/guix/log/nix?id=f958d8f062f4f5fa40a5646a59dcb0d67432ad09'>nix</a>/<a href='/guix/log/nix/libstore?id=f958d8f062f4f5fa40a5646a59dcb0d67432ad09'>libstore</a>/<a href='/guix/log/nix/libstore/store-api.cc?id=f958d8f062f4f5fa40a5646a59dcb0d67432ad09'>store-api.cc</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/nix/libstore/store-api.cc?id=f958d8f062f4f5fa40a5646a59dcb0d67432ad09&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-06-13 00:44:01 +0200'>2019-06-13</span></td><td><a href='/guix/commit/nix/libstore/store-api.cc?id=76533c52c06de4823738b32e450a1a06522018d1'>daemon: Replace "illegal" by "invalid" in error messages.</a><span class='msg-avail'>...<span class='msg-tooltip'>* nix/libstore/build.cc (parseReferenceSpecifiers): Replace "illegal" by
"invalid".
* nix/libstore/globals.cc (Settings::pack): Likewise.
* nix/libstore/store-api.cc (checkStoreName): Likewise.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-12-16 16:28:07 +0100'>2018-12-16</span></td><td><a href='/guix/commit/nix/libstore/store-api.cc?id=8327e733966cc4a93dfaadd1a761ca1088078baa'>daemon: Use unbranded phrases in comments and messages.</a><span class='msg-avail'>...<span class='msg-tooltip'>* nix/libstore/build.cc, nix/libstore/globals.cc,
nix/libstore/gc.cc, nix/libstore/local-store.cc,
nix/libstore/optimise-store.cc, nix/libstore/store-api.cc,
nix/libutil/archive.cc, nix/nix-daemon/nix-daemon.cc: Replace "Nix
store" by "store", and "Nix daemon" by "build daemon".
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-14 11:17:00 +0200'>2018-06-14</span></td><td><a href='/guix/commit/nix/libstore/store-api.cc?id=ea0a06cee2ba05451f94714a4f913db02efbe92c'>Remove 'guix-register' and its traces.</a><span class='msg-avail'>...<span class='msg-tooltip'>* Makefile.am (SH_TESTS): Remove tests/guix-register.sh.
* build-aux/pre-inst-env.in (GUIX_REGISTER): Remove.
* gnu/build/install.scm (directives): Remove outdated comment.
* gnu/build/vm.scm (root-partition-initializer): Update comment.
* gnu/packages/package-management.scm (guix-register): Remove.
* guix/config.scm.in (%sbindir, %guix-register-program): Remove.
* guix/scripts/system.scm (install): Adjust docstring.
* guix/self.scm (make-config.scm): Remove #:guix.  Do not generate
%sbindir and %guix-register-program.
(specification-&gt;package): Remove "guix".
* nix/guix-register/guix-register.cc: Remove.
* nix/libstore/store-api.cc (decodeValidPathInfo): Remove.
* nix/libstore/store-api.hh (decodeValidPathInfo): Remove declaration.
* nix/local.mk (sbin_PROGRAMS, guix_register_SOURCES)
(guix_register_CPPFLAGS, guix_register_LDFLAGS): Remove.
* tests/guix-register.sh: Remove.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-03-30 23:42:07 +0200'>2018-03-30</span></td><td><a href='/guix/commit/nix/libstore/store-api.cc?id=c7589cce8d3f9fcb7769e424f341dba8fb3545d0'>daemon: Remove dead code.</a><span class='msg-avail'>...<span class='msg-tooltip'>* nix/libstore/globals.cc (Settings::loadConfFile, Settings::unpack):
Remove.
* nix/libstore/globals.hh: Adjust accordingly.
* nix/libstore/misc.cc (queryMissing): Remove.
* nix/libstore/misc.hh: Adjust accordingly.
* nix/libstore/store-api.cc (followLinksToStore)
(followLinksToStorePath, computeStorePathForHash): Remove.
* nix/libstore/store-api.hh: Adjust accordingly.
</span></span></td><td>Ludovic Courtès</td></tr>