debugger.cpp: In function 'LIST* debug_list_read(FILE*)': debugger.cpp:165:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( in, "%d", &len ); ^ [HOOK - conan-center.py] pre_export(): WARN: [FPIC OPTION (KB-H006)] This recipe does not include an 'fPIC' option. Make sure you are using the right casing b2/4.2.0 (test package): WARN: This conanfile has no build step