BUG #8325: Missing script II

The following bug has been logged on the website:

Bug reference: 8325
Logged by: Robert Stone
Email address: floriparob(at)gmail(dot)com
PostgreSQL version: 9.2.4
Operating system: Linux roblaptop 3.9-1-amd64 #1 SMP Debian 3.9.8-1
Description:

Since my previous report discovered pg_upgrade sitting in a directory named
"contrib". Tried to compile it but the following errors occurred:-

root(at)roblaptop:/home/postgres/v9.2/postgresql-9.2.4/contrib/pg_upgrade#
make
gcc -O2 -Wall -Wmissing-prototypes -Wpointer-arith
-Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute
-Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard
-DFRONTEND -DDLSUFFIX=\".so\" -I. -I../../src/interfaces/libpq -I. -I.
-I../../src/include -D_GNU_SOURCE -c -o check.o check.c
In file included from ../../src/include/postgres.h:48:0,
from check.c:10:
../../src/include/utils/elog.h:69:28: fatal error: utils/errcodes.h: No such
file or directory
compilation terminated.
make: *** [check.o] Error 1
root(at)roblaptop:/home/postgres/v9.2/postgresql-9.2.4/contrib/pg_upgrade#

BTW, with Debian GNU Make is called "make" and not "gmake".