Using 1.5.0-rc2 or git master.

Without options test suite pass.

When build with:--enable-debug-symbols --enable-shm-counters --disable-automatic-init-and-cleanup --enable-crypto-system-profile --enable-tests --enable-sasl --enable-ssl --with-libbson=bundled --disable-html-docs --enable-man-pages

$ make check
...

{ "status": "PASS", "test_file": "/MongoDB/handshake/appname_frozen_pooled", "seed": "989029086", "start": 8948.452855240, "end": 8948.452866507, "elapsed": 0.000011267 }

,
lt-test-libmongoc: tests/test-mongoc-handshake.c:260: test_mongoc_handshake_data_append_success: Assertion `strstr (val, platform) != ((void *)0)' failed.
/bin/sh : ligne 1 : 24969 Abandon (core dumped)./$TEST_PROG "--no-fork" -F test-results.json
Makefile:6070: recipe for target 'test' failed

(gdb) bt
#0 0x00007f3dc463fa28 in raise () from /lib64/libc.so.6
#1 0x00007f3dc464162a in abort () from /lib64/libc.so.6
#2 0x00007f3dc4638227 in __assert_fail_base () from /lib64/libc.so.6
#3 0x00007f3dc46382d2 in __assert_fail () from /lib64/libc.so.6
#4 0x000055941454ee2a in test_mongoc_handshake_data_append_success () at tests/test-mongoc-handshake.c:260
#5 0x0000559414567aa6 in TestSuite_RunTest (suite=suite@entry=0x7ffff3a88450, test=test@entry=0x559416794570, count=count@entry=0x7ffff3a8837c) at tests/TestSuite.c:602
#6 0x00005594145689ee in TestSuite_RunSerial (suite=<optimized out>) at tests/TestSuite.c:868
#7 TestSuite_Run (suite=0x7ffff3a88450) at tests/TestSuite.c:949
#8 0x000055941450bf6f in main (argc=4, argv=0x7ffff3a88598) at tests/test-libmongoc.c:1844