Use RUNPATH instead of RPATH so that end users can override the library
search path (and the 'validate-runpath' phase can do its work).

diff --git a/build/config/gcc/BUILD.gn b/build/config/gcc/BUILD.gn
--- a/build/config/gcc/BUILD.gn
+++ b/build/config/gcc/BUILD.gn
@@ -99,7 +99,14 @@ config("executable_config") {
     ]
   }
 
-  if (!is_android && current_os != "aix") {
+  if (is_linux) {
+    ldflags += [
+      # Set DT_RUNPATH instead of DT_RPATH which is important because the
+      # former can be overridden at runtime, and Guix has support for
+      # verifying that nothing is missing.
+      "-Wl,--enable-new-dtags",
+    ]
+  } else if (!is_android && current_os != "aix") {
     ldflags += [
       # TODO(GYP): Do we need a check on the binutils version here?
       #
cted'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=fed6ac2ae182597a492b17a29ed8b26986498755'>refs</a><a class='active' href='/guix/log/gnu/packages/patches/serf-python3.patch'>log</a><a href='/guix/tree/gnu/packages/patches/serf-python3.patch?id=fed6ac2ae182597a492b17a29ed8b26986498755'>tree</a><a href='/guix/commit/gnu/packages/patches/serf-python3.patch?id=fed6ac2ae182597a492b17a29ed8b26986498755'>commit</a><a href='/guix/diff/gnu/packages/patches/serf-python3.patch?id=fed6ac2ae182597a492b17a29ed8b26986498755'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/patches/serf-python3.patch'>
<input type='hidden' name='id' value='fed6ac2ae182597a492b17a29ed8b26986498755'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=fed6ac2ae182597a492b17a29ed8b26986498755'>root</a>/<a href='/guix/log/gnu?id=fed6ac2ae182597a492b17a29ed8b26986498755'>gnu</a>/<a href='/guix/log/gnu/packages?id=fed6ac2ae182597a492b17a29ed8b26986498755'>packages</a>/<a href='/guix/log/gnu/packages/patches?id=fed6ac2ae182597a492b17a29ed8b26986498755'>patches</a>/<a href='/guix/log/gnu/packages/patches/serf-python3.patch?id=fed6ac2ae182597a492b17a29ed8b26986498755'>serf-python3.patch</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/patches/serf-python3.patch?id=fed6ac2ae182597a492b17a29ed8b26986498755&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-12-19 22:53:00 +0100'>2020-12-19</span></td><td><a href='/guix/commit/gnu/packages/patches/serf-python3.patch?id=f6f6e1efeecd553c3af4c31695b17fb69849967b'>gnu: serf: Build with Python 3.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/patches/serf-python3.patch: New file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/web.scm (serf)[source](patches): New field.
[arguments]: Remove #:scons.
</span></span></td><td>Marius Bakke</td></tr>