commit 137374fd6538cf9dee0cb22907728d8fdecb5832
author Bram Moolenaar <Bram@vim.org> Sun May 13 15:59:50 2018 +0200
committer Bram Moolenaar <Bram@vim.org> Sun May 13 15:59:50 2018 +0200
tree 300180a61a2e24db7bd4a085f99c710988b4632b
parent 8b62e31003693fee4b288e7aea49170f032aeef3

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)

src/configure.ac

diff --git a/src/configure.ac b/src/configure.ac
index cfc3b1b..107c170 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -3709,7 +3709,7 @@
 	getpgid setpgid setsid sigaltstack sigstack sigset sigsetjmp sigaction \
 	sigprocmask sigvec strcasecmp strerror strftime stricmp strncasecmp \
 	strnicmp strpbrk strtol tgetent towlower towupper iswupper \
-	usleep utime utimes mblen ftruncate)
+	usleep utime utimes mblen ftruncate unsetenv)
 AC_FUNC_FSEEKO
 
 dnl define _LARGE_FILES, _FILE_OFFSET_BITS and _LARGEFILE_SOURCE when