BUG #14742: build fails on psql

The following bug has been logged on the website:

Bug reference:      14742
Logged by:          Chris Ruprecht
Email address:      chris@cdrbill.com
PostgreSQL version: 10beta2
Operating system:   macOS 10.12.5
Description:        

The build fails at this point:

gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement
-Wendif-labels -Wmissing-format-attribute -Wformat-security
-fno-strict-aliasing -fwrapv -Wno-unused-command-line-argument -O2 command.o
common.o conditional.o copy.o crosstabview.o describe.o help.o input.o
large_obj.o mainloop.o prompt.o psqlscanslash.o sql_help.o startup.o
stringutils.o tab-complete.o variables.o  -L../../../src/common -lpgcommon
-L../../../src/port -lpgport -L../../../src/interfaces/libpq -lpq
-L../../../src/port -L../../../src/common -L/usr/local/lib 
-Wl,-dead_strip_dylibs  -L../../../src/fe_utils -lpgfeutils -lpq  -lpgcommon
-lpgport -lxslt -lxml2 -lpam -lssl -lcrypto -lgssapi_krb5 -lz -lreadline -lm
 -o psql
Undefined symbols for architecture x86_64:
  "_appendShellStringNoError", referenced from:
      _psql_get_variable in common.o
  "_psql_scan_set_passthrough", referenced from:
      _MainLoop in mainloop.o
      _main in startup.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see
invocation)

Configure options are:

./configure  \
  --prefix=/usr/local              \
  --enable-integer-datetimes \
  --enable-thread-safety        \
  --with-perl             \
  --with-python           \
  --with-gssapi           \
  --with-openssl             \
  --with-pam              \
  --with-zlib             \
  --with-libxml         \
  --with-libxslt        \
  --with-uuid=e2fs      \
  --with-perl \
  --with-wal-segsize=64 \
  --with-wal-segsize=16 \
  --with-bonjour