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']
e>
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<div class='path'>path: <a href='/guix/log/?id=f0ac12fa1a261854c662a9746d06e7667bef1470'>root</a>/<a href='/guix/log/gnu?id=f0ac12fa1a261854c662a9746d06e7667bef1470'>gnu</a>/<a href='/guix/log/gnu/packages?id=f0ac12fa1a261854c662a9746d06e7667bef1470'>packages</a>/<a href='/guix/log/gnu/packages/diffoscope.scm?id=f0ac12fa1a261854c662a9746d06e7667bef1470'>diffoscope.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/gnu/packages/diffoscope.scm?id=f0ac12fa1a261854c662a9746d06e7667bef1470&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-10-30 20:07:24 +0800'>2024-10-30</span></td><td><a href='/guix/commit/gnu/packages/diffoscope.scm?id=d6f775c30c6f47e174f6110d1089edc6315600e4'>gnu: diffoscope: Update to 282.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/diffoscope.scm (diffoscope): Update to 282.

Signed-off-by: Zheng Junjie &lt;zhengjunjie@iscas.ac.cn&gt;
</span></span></td><td>Vagrant Cascadian</td></tr>
<tr><td><span title='2024-09-09 21:08:15 +0800'>2024-09-09</span></td><td><a href='/guix/commit/gnu/packages/diffoscope.scm?id=cc2619a7bd7542d834762de2430937a59d1f3a36'>gnu: trydiffoscope: Update Style.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/diffoscope.scm (reprotest): Reindent.
[arguments]: Use G-expression. Remove trailing #t.

Change-Id: I5d77472405adcca35eca7bed9663f30f1f8ed18e
</span></span></td><td>Zheng Junjie</td></tr>
<tr><td><span title='2024-09-09 21:03:50 +0800'>2024-09-09</span></td><td><a href='/guix/commit/gnu/packages/diffoscope.scm?id=2305b94c2ecb5354c2142b02e28ec861f93a21e4'>gnu: trydiffoscope: Update to 67.0.8.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/diffoscope.scm (trydiffoscope): Update to 67.0.8.
</span></span></td><td>Vagrant Cascadian</td></tr>
<tr><td><span title='2024-09-09 21:03:50 +0800'>2024-09-09</span></td><td><a href='/guix/commit/gnu/packages/diffoscope.scm?id=694cd39fa1a7920b64ee7295560741c4069ca651'>gnu: reprotest: Use G-expression.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/diffoscope.scm (reprotest)[arguments]: Use G-expression.

Change-Id: I35d4673e39a449169f5a66265e486d8e45268425
</span></span></td><td>Zheng Junjie</td></tr>
<tr><td><span title='2024-09-09 21:03:50 +0800'>2024-09-09</span></td><td><a href='/guix/commit/gnu/packages/diffoscope.scm?id=ed6ca2c4136e2f584aefb9378b3e1cddf58fe553'>gnu: reprotest: Simplify native-inputs.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/diffoscope.scm (reprotest): Simplify native-inputs.

Change-Id: Ia443fb9369e65e686d619acaffa60c130a5503cf
</span></span></td><td>Zheng Junjie</td></tr>
<tr><td><span title='2024-09-09 20:57:30 +0800'>2024-09-09</span></td><td><a href='/guix/commit/gnu/packages/diffoscope.scm?id=e85ab7d2e52543fc086dce9144748e6f4b908ca9'>gnu: reprotest: Update to 0.7.28.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/diffoscope.scm (reprotest): Update to 0.7.28.
[arguments]&lt;#:phases&gt;: Remove adjust-locales phase.

Change-Id: I11a0fd6fa9dae47bb5748dd404856d07a3b08b0c
</span></span></td><td>Vagrant Cascadian</td></tr>
<tr><td><span title='2024-09-03 13:21:38 -0700'>2024-09-03</span></td><td><a href='/guix/commit/gnu/packages/diffoscope.scm?id=7fa9df431e9423e2b79c8c520de1d0ef7aed910d'>gnu: diffoscope: Update to 277.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/diffoscope.scm (diffoscope): Update to 277.
</span></span></td><td>Vagrant Cascadian</td></tr>
<tr><td><span title='2024-08-18 02:00:00 +0200'>2024-08-18</span></td><td><a href='/guix/commit/gnu/packages/diffoscope.scm?id=0bbd7214a23b2fb6bb5a702da79bd17967c457be'>gnu: diffoscope: Update to 276.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/diffoscope.scm (diffoscope): Update to 276.

Change-Id: I15c5e4b283f79c8d7ce16165f3d2d39200a63810
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2024-07-05 12:18:27 -0700'>2024-07-05</span></td><td><a href='/guix/commit/gnu/packages/diffoscope.scm?id=e725e47a695c82305fa65e63e54477c6a210f53d'>ugnu: diffoscope: Update to 272.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes: https://issues.guix.gnu.org/71886

* gnu/packages/diffoscope.scm (diffoscope): Update to 272.
</span></span></td><td>Vagrant Cascadian</td></tr>