Discuss here different C compiler set ups, and compiling executables for the ESP8266

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By Gato
#80826 Hi, I'm trying to use lwIP in my project (I don't really like espconn). I'm using the nonos sdk and building on Linux (no arduino). However, I notice there are copies, or fragments of lwIP scattered in several places. For example, there are three copies of lwip/opt.h:


I have many questions: Why is it there are three copies? Which one is the toolchain using and why? Should I modify one of those if I want, say, POSIX sockets? Or better yet: where can I find all this documented?