Hi Waldemar, I've recently encountered an issue with broken posix_spawn in uClibc-ng 1.0.26, which made cups 2.2.[46] unusable. Looking at commit 71b3a63b641716165f664cf112be0673a122cea0, I see that it should be fixed in 1.0.27. I have a small test code that illustrates the problem with posix_spawn, which works fine with GNU lib C, but fails with uClibc-ng 1.0.26 (see posix_spawn.c attached). If I remove POSIX_SPAWN_SETSIGDEF flag, it works OK. I can't test it with 1.0.27 yet, could you please verify that it works? Also, if it works fine, another question. What is the proper macro test for working posix_spawn (uClibc-ng version 1.0.27+)? Thank you, Alex