patch 8.0.1832: cannot use :unlet for an environment variable commit https://github.com/vim/vim/commit/137374fd6538cf9dee0cb22907728d8fdecb5832 Author: Bram Moolenaar <Bram@vim.org> Date: Sun May 13 15:59:50 2018 +0200 patch 8.0.1832: cannot use :unlet for an environment variable Problem: Cannot use :unlet for an environment variable. Solution: Make it work. Use unsetenv() if available. (Ken Takata, closes #2855)

/* if_cscope.c */
char_u *get_cscope_name(expand_T *xp, int idx);
void set_context_in_cscope_cmd(expand_T *xp, char_u *arg, cmdidx_T cmdidx);
void ex_cscope(exarg_T *eap);
void ex_scscope(exarg_T *eap);
void ex_cstag(exarg_T *eap);
int cs_fgets(char_u *buf, int size);
void cs_free_tags(void);
void cs_print_tags(void);
int cs_connection(int num, char_u *dbpath, char_u *ppath);
void cs_end(void);
/* vim: set ft=c : */