BUG #19727: pg-combinebackup fails to link

The following bug has been logged on the website:

Bug reference: 19727
Logged by: Ross Burton
Email address: ross(at)burtonini(dot)com
PostgreSQL version: 18.6
Operating system: Linux
Description:

When I build pg-combineback from postgress 18.6 (in Yocto, cross-compiled on
aarch64 to aarch64), it fails to link:

aarch64-poky-linux-ld: src/common/libpgcommon.a(jsonapi.o): in function
`json_lex_number':
src/common/jsonapi.c:2379:(.text+0x168): undefined reference to
`appendBinaryPQExpBuffer'
aarch64-poky-linux-ld: src/common/libpgcommon.a(jsonapi.o): in function
`makeJsonLexContextCstringLen':
src/common/jsonapi.c:418:(.text+0x44c): undefined reference to
`createPQExpBuffer'
aarch64-poky-linux-ld: src/common/libpgcommon.a(jsonapi.o): in function
`allocate_incremental_state':
src/common/jsonapi.c:465:(.text+0x578): undefined reference to
`initPQExpBuffer'
aarch64-poky-linux-ld: src/common/libpgcommon.a(jsonapi.o): in function
`makeJsonLexContextIncremental':
src/common/jsonapi.c:535:(.text+0x67c): undefined reference to
`createPQExpBuffer'
aarch64-poky-linux-ld: src/common/libpgcommon.a(jsonapi.o): in function
`freeJsonLexContext':
src/common/jsonapi.c:699:(.text+0x728): undefined reference to
`destroyPQExpBuffer'
aarch64-poky-linux-ld: src/common/jsonapi.c:696:(.text+0x768): undefined
reference to `destroyPQExpBuffer'
aarch64-poky-linux-ld: src/common/jsonapi.c:703:(.text+0x794): undefined
reference to `termPQExpBuffer'
aarch64-poky-linux-ld: src/common/libpgcommon.a(jsonapi.o): in function
`json_lex':
src/common/jsonapi.c:1606:(.text+0xaa8): undefined reference to
`resetPQExpBuffer'