Unable to compile on !debian stretch

[JiffB]

Hi folks,

Disclaimer: this may be tied to the fact that I use mariadb instead of mysql.
Packages installed for both:

ii  libmariadb-dev                    2.3.2-2          amd64        MariaDB Connector/C, development files
ii  libmariadb2:amd64                 2.3.2-2          amd64        MariaDB Connector/C
ii  libmariadbclient-dev              10.1.26-0+deb9u1 amd64        MariaDB database development files
ii  libmariadbclient-dev-compat:amd64 10.1.26-0+deb9u1 amd64        MariaDB database development files (libmysqlclient compatibility)
ii  libmariadbd-dev:amd64             10.1.26-0+deb9u1 amd64        MariaDB embedded database, development files
ii  libmariadbd18:amd64               10.1.26-0+deb9u1 amd64        MariaDB embedded database, shared library
ii  mariadb-common                    10.1.26-0+deb9u1 all          MariaDB common metapackage
.
ii  default-libmysqlclient-dev:amd64 1.0.2            amd64        MySQL database development files (metapackage)
ii  libmysql++-dev                   3.2.2+pristine-2 amd64        MySQL C++ library bindings (development)
ii  libmysql++3v5                    3.2.2+pristine-2 amd64        MySQL C++ library bindings (runtime)
ii  mysql-common                     5.8+1.0.2        all          MySQL database common files, e.g. /etc/mysql/my.cnf

Compilation fails with:

[…]
Making all in net
make[2]: Entering directory '/tmp/libpki/src/net'
/bin/bash ../../libtool  --tag=CC   --mode=compile gcc  -I. -I../../src/libpki -I.. -DENABLE_ECDSA=1     -D__LIB_BUILD__  -I/usr/include -g -O2 -fstack-check -maccumulate-outgoing-args -Werror -Wfatal-errors -Wunused-variable  -DENABLE_ECDSA=1   -I/usr/include/libxml2 -I/usr/include/mysql  -I/usr/include/postgresql -DLINUX -g -O2 -fstack-check -maccumulate-outgoing-args -Werror -Wfatal-errors -MT libpki_net_la-url.lo -MD -MP -MF .deps/libpki_net_la-url.Tpo -c -o libpki_net_la-url.lo `test -f 'url.c' || echo './'`url.c
libtool: compile:  gcc -I. -I../../src/libpki -I.. -DENABLE_ECDSA=1 -D__LIB_BUILD__ -I/usr/include -g -O2 -fstack-check -maccumulate-outgoing-args -Werror -Wfatal-errors -Wunused-variable -DENABLE_ECDSA=1 -I/usr/include/libxml2 -I/usr/include/mysql -I/usr/include/postgresql -DLINUX -g -O2 -fstack-check -maccumulate-outgoing-args -Werror -Wfatal-errors -MT libpki_net_la-url.lo -MD -MP -MF .deps/libpki_net_la-url.Tpo -c url.c  -fPIC -DPIC -o .libs/libpki_net_la-url.o
url.c: In function ‘URL_get_data_url’:
url.c:305:34: error: passing argument 1 of ‘URL_get_data_mysql_url’ discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
    ret = URL_get_data_mysql_url( url, size );
                                  ^~~
compilation terminated due to -Wfatal-errors.
cc1: all warnings being treated as errors
Makefile:577: recipe for target 'libpki_net_la-url.lo' failed
make[2]: *** [libpki_net_la-url.lo] Error 1
make[2]: Leaving directory '/tmp/libpki/src/net'
Makefile:897: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/tmp/libpki/src'
Makefile:839: recipe for target 'all-recursive' failed
make: *** [all-recursive] Error 1

Is there a fix about that, or shall I remove mariadb dev packages to replace them with the mysql ones, or is there missing packages, or is it a bug ?

[opencrypto]

Already resolved, see #43