openssl_iostream.c error

[gz15028]

Hello,
I was trying to recompile the lib from source on Ubuntu 18.04 with gcc 7.5.0 and openssl 1.1.1d.
The following error occurred:

libtool: compile: gcc -DHAVE_CONFIG_H -I. -I../.. -pthread -I/usr/local/include -Wpedantic -Wvla -g -O2 -std=gnu11 -fvisibility=hidden -pipe -Wall -W -Werror -Wno-unused-parameter -Wno-missing-field-initializers -Wpointer-arith -Wstrict-prototypes -Wcast-qual -Wcast-align -Wno-error=unused-function -Wno-error=unused-variable -Wno-error=deprecated-declarations -MT libneo4j_client_la-openssl_iostream.lo -MD -MP -MF .deps/libneo4j_client_la-openssl_iostream.Tpo -c openssl_iostream.c -fPIC -DPIC -o .libs/libneo4j_client_la-openssl_iostream.o
openssl_iostream.c:56:1: error: variable ‘_iostream_bio_method’ has initializer but incomplete type
static BIO_METHOD _iostream_bio_method = {
^~~~~~
openssl_iostream.c:57:5: error: excess elements in struct initializer [-Werror]
BIO_TYPE_FILTER,
^~~~~~~~~~~~~~~
openssl_iostream.c:57:5: note: (near initialization for ‘_iostream_bio_method’)
openssl_iostream.c:58:5: error: excess elements in struct initializer [-Werror]
"neo4j_openssl_iostream",
^~~~~~~~~~~~~~~~~~~~~~~~
openssl_iostream.c:58:5: note: (near initialization for ‘_iostream_bio_method’)
openssl_iostream.c:59:5: error: excess elements in struct initializer [-Werror]
iostream_bio_write,
^~~~~~~~~~~~~~~~~~
openssl_iostream.c:59:5: note: (near initialization for ‘_iostream_bio_method’)
openssl_iostream.c:60:5: error: excess elements in struct initializer [-Werror]
iostream_bio_read,
^~~~~~~~~~~~~~~~~
openssl_iostream.c:60:5: note: (near initialization for ‘_iostream_bio_method’)
openssl_iostream.c:61:5: error: excess elements in struct initializer [-Werror]
iostream_bio_puts,
^~~~~~~~~~~~~~~~~
openssl_iostream.c:61:5: note: (near initialization for ‘_iostream_bio_method’)
openssl_iostream.c:62:5: error: excess elements in struct initializer [-Werror]
iostream_bio_gets,
^~~~~~~~~~~~~~~~~
openssl_iostream.c:62:5: note: (near initialization for ‘_iostream_bio_method’)
openssl_iostream.c:63:5: error: excess elements in struct initializer [-Werror]
iostream_bio_ctrl,
^~~~~~~~~~~~~~~~~
openssl_iostream.c:63:5: note: (near initialization for ‘_iostream_bio_method’)
openssl_iostream.c:64:5: error: excess elements in struct initializer [-Werror]
iostream_bio_create,
^~~~~~~~~~~~~~~~~~~
openssl_iostream.c:64:5: note: (near initialization for ‘_iostream_bio_method’)
openssl_iostream.c:65:5: error: excess elements in struct initializer [-Werror]
iostream_bio_destroy
^~~~~~~~~~~~~~~~~~~~
openssl_iostream.c:65:5: note: (near initialization for ‘_iostream_bio_method’)
openssl_iostream.c: In function ‘neo4j_openssl_iostream’:
openssl_iostream.c:68:38: error: dereferencing pointer to incomplete type ‘BIO {aka struct bio_st}’
#define BIO_set_data(bio, value) (bio->ptr = (value))
^
openssl_iostream.c:121:5: note: in expansion of macro ‘BIO_set_data’
BIO_set_data(iostream_bio, delegate);
^~~~~~~~~~~~
openssl_iostream.c: At top level:
openssl_iostream.c:56:19: error: storage size of ‘_iostream_bio_method’ isn’t known
static BIO_METHOD _iostream_bio_method = {
^~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
Makefile:784: recipe for target 'libneo4j_client_la-openssl_iostream.lo' failed
make[3]: *** [libneo4j_client_la-openssl_iostream.lo] Error 1

Any idea what could be the reason? Thanks a lot!

[majensen]

Incredibly, I may know the fix for this.
OpenSSL 1.1.1 made a bunch of breaking changes to its API from 1.0.2. Luckily, @cleishm made it possible to use the new API, but it is currently obscure.

Try configuring as follows
CFLAGS="-DHAVE_BIO_METH_NEW" ./configure
and make from there.

[gz15028]

It works! thank you!