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=75f24d40fdb21dc97e4f4771cfcd8e7571485db4'>root</a>/<a href='/guix/log/gnu?id=75f24d40fdb21dc97e4f4771cfcd8e7571485db4'>gnu</a>/<a href='/guix/log/gnu/packages?id=75f24d40fdb21dc97e4f4771cfcd8e7571485db4'>packages</a>/<a href='/guix/log/gnu/packages/orange.scm?id=75f24d40fdb21dc97e4f4771cfcd8e7571485db4'>orange.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/orange.scm?id=75f24d40fdb21dc97e4f4771cfcd8e7571485db4&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-04-19 20:12:13 -0400'>2023-04-19</span></td><td><a href='/guix/commit/gnu/packages/orange.scm?id=9df900341fa60f7a945bffd2ec00a59ece4d6f7b'>gnu: python-typing-extensions: Move to (gnu packages python-build).</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/python-xyz.scm (python-typing-extensions): Move to...
* gnu/packages/python-build.scm (python-typing-extensions): ... here.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2023-02-17 14:49:13 -0500'>2023-02-17</span></td><td><a href='/guix/commit/gnu/packages/orange.scm?id=abe7afb17ced298743f3eca2fa156d480fdd038d'>gnu: Make nothing depend on QtWebKit.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is required for &lt;https://issues.guix.gnu.org/53289&gt;.

* gnu/packages/qt.scm (python-pyqt)[inputs]: Remove qtwebkit.
(python-pyqt-without-qtwebkit): Remove variable.
(python-pyqtwebengine)[inputs]: Replace python-pyqt-without-qtwebkit with
python-pyqt.
* gnu/packages/backup.scm (vorta)[inputs]: Likewise.
* gnu/packages/ebook.scm (calibre)[inputs]: Likewise.
[arguments]: Adjust accordingly.
* gnu/packages/education.scm (anki)[inputs]: Replace
python-pyqt-without-qtwebkit with python-pyqt.
* gnu/packages/kde-games.scm (kajongg)[inputs]: Likewise.
* gnu/packages/maths.scm (veusz)[inputs]: Likewise.
* gnu/packages/music.scm (frescobaldi)[inputs]: Likewise.
(picard)[inputs]: Likewise.
* gnu/packages/orange.scm (orange)[inputs]: Likewise.
* gnu/packages/pdf.scm (flyer-composer)[inputs]: Likewise.
* gnu/packages/python-check.scm (python-pytest-qt)[propagated-inputs]: Likewise.
* gnu/packages/python-xyz.scm (python-qtconsole)[propagated-inputs]: Likewise.
(python-pyqtgraph)[propagated-inputs]: Likewise.
* gnu/packages/radio.scm (gnuradio)[inputs]: Likewise.
* gnu/packages/video.scm (openshot)[inputs]: Likewise.
* gnu/packages/vpn.scm (openconnect-sso)[inputs]: Likewise.
* gnu/packages/web-browsers.scm (qutebrowser)[inputs]: Likewise.
</span></span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2022-09-06 16:58:13 +0200'>2022-09-06</span></td><td><a href='/guix/commit/gnu/packages/orange.scm?id=be810d414f0f5d904bb3d84793b7813b69c55cff'>gnu: orange: Fix QT_PLUGIN_PATH.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/orange.scm (orange)[arguments]: Fix QT_PLUGIN_PATH.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Greg Hogan</td></tr>
<tr><td><span title='2022-07-31 21:55:43 -0400'>2022-07-31</span></td><td><a href='/guix/commit/gnu/packages/orange.scm?id=1ef04fb2288dade3ad2883026ae286a68ef13a1e'>gnu: qtsvg: Rename variable to qtsvg-5.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is in preparation of the qtsvg update to version 6.

This change was automated via the following command:

  git grep -l '\bqtsvg\b' | xargs sed 's/qtsvg/qtsvg-5/g' -i
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-06-18 13:07:10 -0300'>2022-06-18</span></td><td><a href='/guix/commit/gnu/packages/orange.scm?id=b2f2fdb37ee0d36f04f6439fce4f5d12ac83a2eb'>gnu: orange: Update to 3.32.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/orange.scm (orange): Update to 3.32.0.
</span></span></td><td>Vinicius Monego</td></tr>