As for libc's `system', change Awk to look for `sh' in $PATH.  This patch is
only meant to be used during bootstrapping, where we don't know in advance the
absolute file name of `sh'.

--- gawk-4.1.3/io.c	2015-05-19 15:37:20.000000000 +0200
+++ gawk-4.1.3/io.c	2015-06-09 18:39:36.918414881 +0200
@@ -2025,7 +2025,7 @@
 
 		set_sigpipe_to_default();
 
-		execl("/bin/sh", "sh", "-c", command, NULL);
+		execlp("sh", "sh", "-c", command, NULL);
 		_exit(errno == ENOENT ? 127 : 126);
 
 	case -1:
@@ -2077,7 +2077,7 @@
 
 		signal(SIGPIPE, SIG_DFL);
 
-		execl("/bin/sh", "sh", "-c", command, NULL);
+		execlp("sh", "sh", "-c", command, NULL);
 		_exit(errno == ENOENT ? 127 : 126);
 
 	case -1:
@@ -2422,7 +2422,7 @@
 			fatal(_("close of pipe failed (%s)"), strerror(errno));
 		/* stderr does NOT get dup'ed onto child's stdout */
 		set_sigpipe_to_default();
-		execl("/bin/sh", "sh", "-c", str, NULL);
+		execlp("sh", "sh", "-c", str, NULL);
 		_exit(errno == ENOENT ? 127 : 126);
 	}
 #endif /* NOT __EMX__, NOT __MINGW32__ */
@@ -2659,7 +2659,7 @@
 		if (close(p[0]) == -1 || close(p[1]) == -1)
 			fatal(_("close of pipe failed (%s)"), strerror(errno));
 		set_sigpipe_to_default();
-		execl("/bin/sh", "sh", "-c", cmd, NULL);
+		execlp("sh", "sh", "-c", cmd, NULL);
 		_exit(errno == ENOENT ? 127 : 126);
 	}
 #endif /* NOT __EMX__, NOT __MINGW32__ */
t/etc/hurd-manifest.scm?id=4624302c4a626873e83f163cf5b3856d8c5e1566'>commit</a><a href='/guix/diff/etc/hurd-manifest.scm?id=4624302c4a626873e83f163cf5b3856d8c5e1566'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/etc/hurd-manifest.scm'>
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<div class='path'>path: <a href='/guix/log/?id=4624302c4a626873e83f163cf5b3856d8c5e1566'>root</a>/<a href='/guix/log/etc?id=4624302c4a626873e83f163cf5b3856d8c5e1566'>etc</a>/<a href='/guix/log/etc/hurd-manifest.scm?id=4624302c4a626873e83f163cf5b3856d8c5e1566'>hurd-manifest.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/etc/hurd-manifest.scm?id=4624302c4a626873e83f163cf5b3856d8c5e1566&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-12-18 23:16:28 +0100'>2023-12-18</span></td><td><a href='/guix/commit/etc/hurd-manifest.scm?id=32d4f40589e32cbac6549c50962011084f13d9fc'>maint: Build more development packages for GNU/Hurd.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/hurd-manifest.scm: Add Autotools and Guile-related packages.

Change-Id: I6ded9623543a8f5444e9d6bb04284e9ca2aa2dcd
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-09-19 07:26:56 +0200'>2023-09-19</span></td><td><a href='/guix/commit/etc/hurd-manifest.scm?id=7841a624f0c94efbfeb48a5209dbd92575eacc09'>maint: Add gdk-pixbuf to native Hurd manifest.</a><span class='msg-avail'>...<span class='msg-tooltip'>Gdk-pixbuf is a dependency for `guix system reconfigure' and currently also
needs an unreleased glibc patch in order to build.

* etc/hurd-manifest.scm: Add gdk-pixbuf to manifest.
</span></span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-08-21 10:45:45 +0200'>2023-08-21</span></td><td><a href='/guix/commit/etc/hurd-manifest.scm?id=3c6b6941a2c76c26ebf0c1bfd7f901a22c19dce1'>maint: Add 'etc/hurd-manifest.scm'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* build-aux/cuirass/hurd-manifest.scm: Move to...
* etc/hurd-manifest.scm: ...here.
* Makefile.am (EXTRA_DIST): Update accordingly.
</span></span></td><td>Janneke Nieuwenhuizen</td></tr>