Make sure the build system honors C_INCLUDE_PATH and LIBRARY_PATH when
looking for headers and libraries.

--- Python-2.7.10/setup.py	2015-10-07 18:33:18.125153186 +0200
+++ Python-2.7.10/setup.py	2015-10-07 18:33:47.497347552 +0200
@@ -526,6 +526,14 @@ class PyBuildExt(build_ext):
             inc_dirs += ['/system/include', '/atheos/autolnk/include']
             inc_dirs += os.getenv('C_INCLUDE_PATH', '').split(os.pathsep)
 
+        # Always honor these variables.
+        if not cross_compiling:
+            lib_dirs += os.getenv('LIBRARY_PATH', '').split(os.pathsep)
+            inc_dirs += os.getenv('C_INCLUDE_PATH', '').split(os.pathsep)
+        else:
+            lib_dirs = os.getenv('CROSS_LIBRARY_PATH', '').split(os.pathsep)
+            inc_dirs = os.getenv('CROSS_CPATH', '').split(os.pathsep)
+
         # OSF/1 and Unixware have some stuff in /usr/ccs/lib (like -ldb)
         if host_platform in ['osf1', 'unixware7', 'openunix8']:
             lib_dirs += ['/usr/ccs/lib']
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<div class='path'>path: <a href='/guix/log/?id=7b207e08492998bb91ac99f703f193d32dfee31e'>root</a>/<a href='/guix/log/tests?id=7b207e08492998bb91ac99f703f193d32dfee31e'>tests</a>/<a href='/guix/log/tests/guix-repl.sh?id=7b207e08492998bb91ac99f703f193d32dfee31e'>guix-repl.sh</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/guix-repl.sh?id=7b207e08492998bb91ac99f703f193d32dfee31e&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-09-16 16:04:01 +0200'>2020-09-16</span></td><td><a href='/guix/commit/tests/guix-repl.sh?id=d7f7ed39be3be926b3c46c0ea15d416c593ef61f'>repl: Look for script files in (getcwd).</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://bugs.gnu.org/43331&gt;.

* guix/scripts/repl.scm (guix-repl): Replace "." by (getcwd)
* tests/guix-repl.sh: Add test.

Co-authored-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Konrad Hinsen</td></tr>
<tr><td><span title='2020-06-14 23:02:36 +0200'>2020-06-14</span></td><td><a href='/guix/commit/tests/guix-repl.sh?id=c924e541390f9595d819edc33c19d979917c15ec'>guix repl: Add script execution.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/repl.scm: Add filename options for script execution.
* doc/guix.texi (Invoking guix repl): Document it.
* tests/guix-repl.sh: Test it.
* Makefile.am: (SH_TESTS): Add it.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Konrad Hinsen</td></tr>