Hi, I’m still working on a C interface to mosquitto using GForth 0.7.3 on a Raspberry Pi 3, but I encounter a new problem.
To try to figure out the problem, I reduced the program to a minimum: ******* c-library mosquitto \c #include <mosquitto.h> c-function mosquitto_lib_init mosquitto_lib_init -- n end-c-library ******* mosquitto.h exists in usr\include (The documentation can be found at [1]https://mosquitto.org/api/files/mosquitto-h.html) I start with the folder ‘/home/pi/.gforth/libcc-named’ empty. (I leave /.libs there but delete all its files). I get an error at end-c-library: ar: `u' modifier ignored since `D' is the default (see `U') and file not found :5: open-lib failed Here's what I get when I run the program: ****** $ gforth Gforth 0.7.3, Copyright (C) 1995-2008 Free Software Foundation, Inc. Gforth comes with ABSOLUTELY NO WARRANTY; for details type `license' Type `bye' to exit ok c-library mosquitto ok \c #include <mosquitto.h> ok c-function mosquitto_lib_init mosquitto_lib_init -- n ok end-c-library ar: `u' modifier ignored since `D' is the default (see `U') file not found :5: open-lib failed end-c-library<<< Backtrace: $76947B04 throw $769699D0 c(abort") $76969E98 compile-wrapper-function1 ok ******** As expected, ‘mosquitto_lib_init’ also fails. ****** ok mosquitto_lib_init libcc.fs:534: failed assertion :9: assertion failed mosquitto_lib_init<<< Backtrace: $76947B04 throw $7695E080 c(abort") $769692D8 (end-assert) $769694B4 c-source-file $76969BF8 compile-wrapper-function ****** After execution, ‘/home/pi/.gforth/libcc-named’ contains: * mosquitto.la, * mosquitto.o, * mosquitto.lo, and * mosquitto.c and ‘/home/pi/.gforth/libcc-named/.libs’ contains: * mosquitto.lai, * mosquitto.la, * mosquitto.so.0.0.0, * mosquitto.so.0, * mosquitto.so, * mosquitto.a, and * mosquitto.o Any idea? Thank you for your help. Mario Envoyé de mon iPad Le 28 sept. 2023 à 22:17, Bernd Paysan <be...@net2o.de> a écrit : Am Donnerstag, 28. September 2023, 20:00:34 CEST schrieb Mario Beaulieu via Gforth discussion and announcements: c-function mosquitto_new mosquittoNew a n void -- "What do I put here?" This should be: c-function mosquittoNew mosquitto_new s n a -- a The order of names (Forth name first, C name second) matters, and for the paramenters: whatever address it is, it should be an a type, i.e. whenever the C programmer writes a * at the end of the type, it is an a. Unless of course if it is a const char *, i.e. a string, then it is more comfortable to pass a Forth string to C, and use the s type, so you can call s" my id" 1 callback-object mosquittoNew and the s type constructs a zero terminated C string out of that Forth string. -- Bernd Paysan "If you want it done right, you have to do it yourself" net2o id: kQusJzA;7*?t=uy@X}1GWr!+0qqp_Cn176t4(dQ* https://net2o.de/ References 1. https://mosquitto.org/api/files/mosquitto-h.html
