add posix macros to build script

Author: dreamer-coding

code/logic/meson.build

@@ -1,4 +1,6 @@
 dir = include_directories('.')
+add_project_arguments('-D_POSIX_C_SOURCE=200112L', language: 'c')
+add_project_arguments('-D_POSIX_C_SOURCE=200112L', language: 'cpp')
 
 fossil_sys_lib = library('fossil_sys',
     files('memory.c', 'datetime.c', 'hostinfo.c', 'syscall.c', 'bitwise.c'),