under Mac OS X, sendfile(2) requires sys/socket.h & sys/uio.h

configure

@@ -4561,7 +4561,7 @@ MAGICK_PATCHLEVEL_VERSION=32
 
 MAGICK_VERSION=6.9.11-32
 
-MAGICK_GIT_REVISION=15921:7847ad540:20200927
+MAGICK_GIT_REVISION=15923:ec6247db0:20200929
 
 
 # Substitute library versioning
@@ -22894,7 +22894,7 @@ fi
 
 
 # Check additional headers
-for ac_header in arm/limits.h arpa/inet.h complex.h errno.h fcntl.h limits.h linux/unistd.h locale.h machine/param.h mach-o/dyld.h netinet/in.h OS.h process.h sun_prefetch.h stdarg.h sys/ipc.h sys/mman.h sys/resource.h sys/sendfile.h sys/socket.h sys/syslimits.h sys/time.h sys/timeb.h sys/times.h sys/wait.h utime.h wchar.h xlocale.h
+for ac_header in arm/limits.h arpa/inet.h complex.h errno.h fcntl.h limits.h linux/unistd.h locale.h machine/param.h mach-o/dyld.h netinet/in.h OS.h process.h sun_prefetch.h stdarg.h sys/ipc.h sys/mman.h sys/resource.h sys/sendfile.h sys/socket.h sys/syslimits.h sys/time.h sys/timeb.h sys/times.h sys/uio.h sys/wait.h utime.h wchar.h xlocale.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"

configure.ac

@@ -959,7 +959,7 @@ AC_HEADER_ASSERT
 AC_HEADER_DIRENT
 
 # Check additional headers
-AC_CHECK_HEADERS(arm/limits.h arpa/inet.h complex.h errno.h fcntl.h limits.h linux/unistd.h locale.h machine/param.h mach-o/dyld.h netinet/in.h OS.h process.h sun_prefetch.h stdarg.h sys/ipc.h sys/mman.h sys/resource.h sys/sendfile.h sys/socket.h sys/syslimits.h sys/time.h sys/timeb.h sys/times.h sys/wait.h utime.h wchar.h xlocale.h)
+AC_CHECK_HEADERS(arm/limits.h arpa/inet.h complex.h errno.h fcntl.h limits.h linux/unistd.h locale.h machine/param.h mach-o/dyld.h netinet/in.h OS.h process.h sun_prefetch.h stdarg.h sys/ipc.h sys/mman.h sys/resource.h sys/sendfile.h sys/socket.h sys/syslimits.h sys/time.h sys/timeb.h sys/times.h sys/uio.h sys/wait.h utime.h wchar.h xlocale.h)
 
 ########
 #

magick/studio.h

@@ -221,6 +221,12 @@ extern int vsnprintf(char *,size_t,const char *,va_list);
 # if defined(MAGICKCORE_HAVE_SYS_SENDFILE_H)
 #  include <sys/sendfile.h>
 # endif
+# if defined(MAGICKCORE_HAVE_SYS_SOCKET_H)
+#  include <sys/socket.h>
+# endif
+# if defined(MAGICKCORE_HAVE_SYS_UIO_H)
+#  include <sys/uio.h>
+# endif
 #endif
 #else
 # include <types.h>