diff -ruN gpgme-1.3.1-orig/configure.ac gpgme-1.3.1/configure.ac
--- gpgme-1.3.1-orig/configure.ac	2011-06-16 07:42:07.000000000 -0500
+++ gpgme-1.3.1/configure.ac	2021-09-29 05:29:42.000000000 -0500
@@ -119,6 +119,8 @@
 	have_ld_version_script=yes
         ;;
     *-apple-darwin*)
+        AC_DEFINE(_DARWIN_C_SOURCE, 900000L,
+                  Expose all libc features (__DARWIN_C_FULL).)
         AC_DEFINE(_XOPEN_SOURCE, 500, Activate POSIX interface on MacOS X)
         ;;
 esac
diff -ruN gpgme-1.3.1-orig/m4/pth.m4 gpgme-1.3.1/m4/pth.m4
--- gpgme-1.3.1-orig/m4/pth.m4	2011-01-19 05:37:43.000000000 -0600
+++ gpgme-1.3.1/m4/pth.m4	2021-09-29 05:39:15.000000000 -0500
@@ -281,6 +281,7 @@
         _AC_PTH_VERBOSE([    o LIBS=\"$LIBS\"])
         cross_compile=no
         define(_code1, [dnl
+        #include <stdlib.h>
         #include <stdio.h>
         #include <pth.h>
         ])
diff -ruN gpgme-1.3.1-orig/src/conversion.c gpgme-1.3.1/src/conversion.c
--- gpgme-1.3.1-orig/src/conversion.c	2011-01-19 05:37:44.000000000 -0600
+++ gpgme-1.3.1/src/conversion.c	2021-09-29 04:43:41.000000000 -0500
@@ -24,6 +24,7 @@
 #endif
 
 #include <stdlib.h>
+#include <stdio.h>
 #include <string.h>
 #ifdef HAVE_SYS_TYPES_H
   /* Solaris 8 needs sys/types.h before time.h.  */