Build fails on PG11

[dkull]

Build succeeds against PG10.6 sources, but fails against 11.0 and 11.1
Trying to do this in Docker postgresql:X-alpine images

make USE_PGXS=1 PG_CONFIG=/usr/local/bin/pg_config top_srcdir=/tmp/postgresql-$PG_VER                                                                                                                                          
rm -f src/datapagemap.h && ln -s /tmp/postgresql-11.0/src/bin/pg_rewind/datapagemap.h src/datapagemap.h                                                                                                                                        rm -f src/logging.h && ln -s /tmp/postgresql-11.0/src/bin/pg_rewind/logging.h src/logging.h                                                                                                                                                    rm -f src/streamutil.h && ln -s /tmp/postgresql-11.0/src/bin/pg_basebackup/streamutil.h src/streamutil.h                                                                                                                                       rm -f src/receivelog.h && ln -s /tmp/postgresql-11.0/src/bin/pg_basebackup/receivelog.h src/receivelog.h
rm -f src/walmethods.h && ln -s /tmp/postgresql-11.0/src/bin/pg_basebackup/walmethods.h src/walmethods.h
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/utils/configuration.
o src/utils/configuration.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/utils/json.o src/uti
ls/json.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/utils/logger.o src/u
tils/logger.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/utils/parray.o src/u
tils/parray.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/utils/pgut.o src/uti
ls/pgut.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/utils/thread.o src/u
tils/thread.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/archive.o src/archiv
e.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/backup.o src/backup.
c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/catalog.o src/catalo
g.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/configure.o src/conf
igure.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/data.o src/data.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/delete.o src/delete.
c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/dir.o src/dir.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/fetch.o src/fetch.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/help.o src/help.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/init.o src/init.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/merge.o src/merge.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/parsexlog.o src/pars
exlog.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/pg_probackup.o src/p
g_probackup.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/restore.o src/restor
e.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/show.o src/show.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/util.o src/util.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/validate.o src/valid
ate.c
rm -f src/pg_crc.c && ln -s /tmp/postgresql-11.0/src/backend/utils/hash/pg_crc.c src/pg_crc.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/pg_crc.o src/pg_crc.
c
rm -f src/datapagemap.c && ln -s /tmp/postgresql-11.0/src/bin/pg_rewind/datapagemap.c src/datapagemap.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/datapagemap.o src/da
tapagemap.c
rm -f src/receivelog.c && ln -s /tmp/postgresql-11.0/src/bin/pg_basebackup/receivelog.c src/receivelog.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/receivelog.o src/rec
eivelog.c
rm -f src/streamutil.c && ln -s /tmp/postgresql-11.0/src/bin/pg_basebackup/streamutil.c src/streamutil.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/streamutil.o src/str
eamutil.c
rm -f src/xlogreader.c && ln -s /tmp/postgresql-11.0/src/backend/access/transam/xlogreader.c src/xlogreader.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/xlogreader.o src/xlo
greader.c
rm -f src/walmethods.c && ln -s /tmp/postgresql-11.0/src/bin/pg_basebackup/walmethods.c src/walmethods.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -DFRONTEND -I. -I./ -I/usr/local/include/
postgresql/server -I/usr/local/include/postgresql/internal  -D_GNU_SOURCE -I/usr/include/libxml2  -I/usr/local/include -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -Isrc -I/tmp/postgresql-11.0//src  -c -o src/walmethods.o src/wal
methods.c
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 src/utils/configuration.o src/utils/json.
o src/utils/logger.o src/utils/parray.o src/utils/pgut.o src/utils/thread.o src/archive.o src/backup.o src/catalog.o src/configure.o src/data.o src/delete.o src/dir.o src/fetch.o src/help.o src/init.o src/merge.o src/parsexlog.o src/pg_pro
backup.o src/restore.o src/show.o src/util.o src/validate.o src/pg_crc.o src/datapagemap.o src/receivelog.o src/streamutil.o src/xlogreader.o src/walmethods.o  -L/usr/local/lib  -L/lib  -L/usr/local/lib -Wl,--as-needed  -L/usr/local/lib -l
pgcommon -lpgport -L/usr/local/lib -lpq -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS -lpgcommon -lpgport -lxslt -lxml2 -lssl -lcrypto -lz -ledit -lm  -o pg_probackup
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../x86_64-alpine-linux-musl/bin/ld: warning: libssl.so.1.0.0, needed by /usr/local/lib/libpq.so, may conflict with libssl.so.45
//lib/libssl.so.1.0.0: warning: EVP_EncryptFinal is often misused, please use EVP_EncryptFinal_ex and EVP_CIPHER_CTX_cleanup
//lib/libssl.so.1.0.0: warning: EVP_DecryptFinal is often misused, please use EVP_DecryptFinal_ex and EVP_CIPHER_CTX_cleanup
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib/libcrypto.so: warning: EVP_CipherFinal is often misused, please use EVP_CipherFinal_ex and EVP_CIPHER_CTX_cleanup
src/streamutil.o: In function `GetConnection':
streamutil.c:(.text+0x5e4): undefined reference to `SetDataDirectoryCreatePerm'
src/walmethods.o: In function `dir_open_for_write':
walmethods.c:(.text+0x468): undefined reference to `pg_file_create_mode'
src/walmethods.o: In function `tar_open_for_write':
walmethods.c:(.text+0xc65): undefined reference to `pg_file_create_mode'
collect2: error: ld returned 1 exit status
make: *** [/usr/local/lib/postgresql/pgxs/src/makefiles/pgxs.mk:423: pg_probackup] Error 1
The command '/bin/sh -c make USE_PGXS=1 PG_CONFIG=/usr/local/bin/pg_config top_srcdir=/tmp/postgresql-$PG_VER' returned a non-zero code: 2

[gsmolk]

Hello!
Can you provide the docker image name so we can check?

[dkull]

Hello,
Yes.

FROM postgres:11.0-alpine as builder
ENV PG_VER 11.0
ENV PROBACKUP_VER 2.0.25
[...]
RUN apk update && apk add vim wget gcc make libc-dev zlib-dev
[...]
WORKDIR /tmp
RUN wget "https://ftp.postgresql.org/pub/source/v$PG_VER/postgresql-$PG_VER.tar.bz2"
RUN tar xjvf postgresql-$PG_VER.tar.bz2
RUN wget "https://github.com/postgrespro/pg_probackup/archive/$PROBACKUP_VER.tar.gz"
RUN tar xzf $PROBACKUP_VER.tar.gz
WORKDIR pg_probackup-$PROBACKUP_VER
RUN apk add libxslt-dev libedit-dev libxml2-dev
RUN make USE_PGXS=1 PG_CONFIG=/usr/local/bin/pg_config top_srcdir=/tmp/postgresql-$PG_VER
RUN cp pg_probackup /
[...]

[dkull]

Aah, my bad. It seems the issue was with the fact that I had sources also installed from the alpine repo, which were for Postgres 10. Sorry for bothering with this :)