How to build only static library

[crazywhalecc]

I need to compile librdkafka purely statically, using both zlib and openssl (they already build files like libz.z and libssl.a).

However, when I build librdkafka, it seems that I cannot prevent it from generating dynamically linked files such as .so. At the same time, because openssl dynamic libraries such as libssl.so are missing, the compilation cannot be successful.

Creating static library librdkafka.a
x86_64-linux-musl-ar rcs librdkafka.a rdkafka.o rdkafka_broker.o rdkafka_msg.o rdkafka_topic.o rdkafka_conf.o rdkafka_timer.o rdkafka_offset.o rdkafka_transport.o rdkafka_buf.o rdkafka_queue.o rdkafka_op.o rdkafka_request.o rdkafka_cgrp.o rdkafka_pattern.o rdkafka_partition.o rdkafka_subscription.o rdkafka_assignment.o rdkafka_assignor.o rdkafka_range_assignor.o rdkafka_roundrobin_assignor.o rdkafka_sticky_assignor.o rdkafka_feature.o rdcrc32.o crc32c.o rdmurmur2.o rdfnv1a.o cJSON.o rdaddr.o rdrand.o rdlist.o tinycthread.o tinycthread_extra.o rdlog.o rdstring.o rdkafka_event.o rdkafka_metadata.o rdregex.o rdports.o rdkafka_metadata_cache.o rdavl.o rdkafka_sasl.o rdkafka_sasl_plain.o rdkafka_interceptor.o rdkafka_msgset_writer.o rdkafka_msgset_reader.o rdkafka_header.o rdkafka_admin.o rdkafka_aux.o rdkafka_background.o rdkafka_idempotence.o rdkafka_cert.o rdkafka_txnmgr.o rdkafka_coord.o rdbase64.o rdvarint.o rdbuf.o rdmap.o rdunittest.o rdkafka_mock.o rdkafka_mock_handlers.o rdkafka_mock_cgrp.o rdkafka_error.o rdkafka_fetcher.o rdkafka_sasl_scram.o rdkafka_sasl_oauthbearer.o snappy.o rdgz.o rdhdrhistogram.o rdkafka_ssl.o rdkafka_lz4.o rdxxhash.o lz4.o lz4frame.o lz4hc.o rddl.o rdkafka_plugin.o
cp librdkafka.a librdkafka-dbg.a
WARNING: librdkafka-static.a: No static libraries available/enabled for inclusion in self-contained static library librdkafka-static.a: this library will be identical to librdkafka.a
WARNING: librdkafka-static.a: The following libraries were not available as static libraries and need to be linked dynamically: -lm -lssl -lcrypto -lz -ldl -lpthread -lrt -lpthread -lrt
cp librdkafka.a librdkafka-static.a
cp librdkafka-dbg.a librdkafka-static-dbg.a
cp librdkafka-static.a librdkafka-static-dbg.a
Generating pkg-config file rdkafka-static.pc
/usr/local/musl/bin/../lib/gcc/x86_64-linux-musl/11.4.0/../../../../x86_64-linux-musl/bin/ld: /home/jerry/static-php-cli/buildroot/lib/libssl.a(libssl-lib-methods.o): relocation R_X86_64_32 against `.rodata' can not be used when making a shared object; recompile with -fPIC
/usr/local/musl/bin/../lib/gcc/x86_64-linux-musl/11.4.0/../../../../x86_64-linux-musl/bin/ld: failed to set dynamic section sizes: bad value
collect2: error: ld returned 1 exit status
make[1]: *** [../mklove/Makefile.base:110：librdkafka.so.1] error 1

I also simply tried to directly patch Makefile.base to avoid generating .so files, but I am not very familiar with librdkafka's build script, and finally there is an integrity check that cannot be bypassed. (This is obviously the wrong way)

[mihaileu]

@emasab do you have a suggestion on how to accomplish the above ?
It will help us with: crazywhalecc/static-php-cli#256