Taken from Debian:
https://salsa.debian.org/multimedia-team/taopm/-/raw/master/debian/patches/01-add-missing-headers.diff

Description: Adding missing headers
Author: Tiago Bortoletto Vaz <tiago@debian.org>
Last-Update: 2013-04-17
--- a/libtao/Tao.cc
+++ b/libtao/Tao.cc
@@ -18,6 +18,7 @@
 
 #include "Tao.h"
 #include <iostream>
+#include <stdio.h>
 
 extern Tao tao;
 float &Time = tao.synthesisEngine.time;
--- a/libtao/TaoDevice.cc
+++ b/libtao/TaoDevice.cc
@@ -20,6 +20,7 @@
 #include "Tao.h"
 #include "TaoAccessPoint.h"
 #include "TaoInstrument.h"
+#include <cstring>
 
 TaoDevice::TaoDevice()
     {
--- a/libtao/TaoInstrument.cc
+++ b/libtao/TaoInstrument.cc
@@ -23,6 +23,7 @@
 //#include <sys/types.h>
 #include <iostream>
 #include <cmath>
+#include <cstring>
 
 float TaoInstrument::defaultMass=3.5;		// Set to optimum value for
                                                 // frequency response of
--- a/libtao/TaoOutput.cc
+++ b/libtao/TaoOutput.cc
@@ -24,6 +24,7 @@
 #include <fstream>
 #include "TaoOutput.h"
 #include "Tao.h"
+#include <cstring>
 
 extern Tao tao;
 
--- a/libtao/TaoPitch.cc
+++ b/libtao/TaoPitch.cc
@@ -30,6 +30,7 @@
 #include "TaoPitch.h"
 #include <iostream>
 #include <cmath>
+#include <cstring>
 
 // This class allows pitches and frequencies to be specified in a number of
 // different formats including the following:
--- a/taoparse/taoparser.yy
+++ b/taoparse/taoparser.yy
@@ -19,7 +19,8 @@
 
 #include <iostream>
 #include <sstream>
-#include <string>
+#include <cstring>
+#include <stdio.h>
 #include "taoparserdefs.h"
 
 int yyerror(char *s);
--- a/libtao/TaoGraphicsEngine.cc
+++ b/libtao/TaoGraphicsEngine.cc
@@ -27,7 +27,8 @@
 #include "TaoInstrument.h"
 #include "TaoAccessPoint.h"
 #include "TaoDevice.h"
-#include <string>
+#include <cstring>
+#include <stdio.h>
     
 extern Tao tao;
 extern void taoMasterTick();
--- a/tao2aiff/tao2aiff.cc
+++ b/tao2aiff/tao2aiff.cc
@@ -25,6 +25,8 @@
 #include <cmath>
 #include "audiofile.h"
 #include "tao2aiff.h"
+#include <cstdlib>
+#include <cstring>
 
 
 main(int argc, char **argv)
--- a/tao2wav/tao2wav.cc
+++ b/tao2wav/tao2wav.cc
@@ -25,6 +25,8 @@
 #include <cmath>
 #include "audiofile.h"
 #include "tao2wav.h"
+#include <cstdlib>
+#include <cstring>
 
 main(int argc, char **argv)
     {
f='/guix/log/gnu/packages/idutils.scm?id=789ef6837f9794c02bc53a854aacfdf04d3384cf'>idutils.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/idutils.scm?id=789ef6837f9794c02bc53a854aacfdf04d3384cf&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-12-08 18:55:58 +0100'>2021-12-08</span></td><td><a href='/guix/commit/gnu/packages/idutils.scm?id=20e6446a68800d44cee8d2d273a04f8d3e8d6428'>gnu: idutils: Fix build with glibc 2.33.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/idutils.scm (idutils)[source]: Remove reference to 'gets'
from "lib/stdio.in.h".
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-11-11 12:18:30 -0500'>2021-11-11</span></td><td><a href='/guix/commit/gnu/packages/idutils.scm?id=a570cea4c6ac82ca39c18b6fd647b008bc8b6147'>gnu: Remove references to a removed patch.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/backup.scm (libchop)[source]: Remove the patch.
  (idutils)[source]: Ditto.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2021-09-11 18:14:06 +0200'>2021-09-11</span></td><td><a href='/guix/commit/gnu/packages/idutils.scm?id=12a664a90e640cfdf83a2a6a85b33cb3c760f1ce'>gnu: idutils: Skip failing Gnulib tests.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/idutils.scm (idutils)[arguments]: New field.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-10-06 02:54:02 +0200'>2020-10-06</span></td><td><a href='/guix/commit/gnu/packages/idutils.scm?id=6c273ee4332ff537aff05eafa276c64018eb15dc'>gnu: Fix up package copyright headers.</a></td><td>Tobias Geerinckx-Rice</td></tr>