diff -urp global-6.6.2/configure.ac global-6.6-2/configure.ac
--- global-6.6.2/configure.ac	2018-02-09 10:46:32 +1000
+++ global-6.6-2/configure.ac	2018-02-14 17:33:00 +1000
@@ -67,6 +67,10 @@ if test ${ac_header_dirent} = no; then
         AC_MSG_ERROR([dirent(3) is required but not found.])
 fi
 
+case "$host_os" in
+	mingw*|djgpp*)
+	;;
+	*)
 AC_MSG_CHECKING(whether POSIX.1-2008 realpath is equipped)
 AC_CACHE_VAL(ac_cv_posix1_2008_realpath,
 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
@@ -77,6 +81,8 @@ AC_MSG_RESULT($ac_cv_posix1_2008_realpat
 if test "$ac_cv_posix1_2008_realpath" = no; then
         AC_MSG_ERROR([POSIX.1-2008 realpath(3) is required.])
 fi
+	;;
+esac
 AC_HEADER_STDC
 AC_HEADER_STAT
 AC_HEADER_TIME
diff -urp global-6.6.2/global/global.c global-6.6-2/global/global.c
--- global-6.6.2/global/global.c	2018-02-09 10:46:32 +1000
+++ global-6.6-2/global/global.c	2018-02-14 17:55:01 +1000
@@ -1097,7 +1097,7 @@ completion_idutils(const char *dbpath, c
 	}
 	if (chdir(root) < 0)
 		die("cannot move to '%s' directory.", root);
-#if defined(_WIN32) && !defined(__CYGWIN__)
+#if (defined(_WIN32) && !defined(__CYGWIN__)) || defined(__DJGPP__)
 	strbuf_puts(sb, lid);
 	strbuf_sprintf(sb, " --file=%s/ID", quote_shell(dbpath));
 	strbuf_puts(sb, " --key=token");
@@ -1152,7 +1152,7 @@ completion_idutils(const char *dbpath, c
 		*p = '\0';
 		puts(line);
 	}
-#if defined(_WIN32) && !defined(__CYGWIN__)
+#if (defined(_WIN32) && !defined(__CYGWIN__)) || defined(__DJGPP__)
 	if (pclose(ip) != 0)
 		die("terminated abnormally (errno = %d).", errno);
 #else
@@ -1313,7 +1313,7 @@ idutils(const char *pattern, const char
 	 * make lid command line.
 	 * Invoke lid with the --result=grep option to generate grep format.
 	 */
-#if defined(_WIN32) && !defined(__CYGWIN__)
+#if (defined(_WIN32) && !defined(__CYGWIN__)) || defined(__DJGPP__)
 	strbuf_puts(ib, lid);
 	strbuf_sprintf(ib, " --file=%s/ID", quote_shell(dbpath));
 	strbuf_puts(ib, " --separator=newline");
@@ -1411,7 +1411,7 @@ idutils(const char *pattern, const char
 			break;
 		}
 	}
-#if defined(_WIN32) && !defined(__CYGWIN__)
+#if (defined(_WIN32) && !defined(__CYGWIN__)) || defined(__DJGPP__)
 	if (pclose(ip) != 0)
 		die("terminated abnormally (errno = %d).", errno);
 #else
diff -urp global-6.6.2/gtags-cscope/command.c global-6.6-2/gtags-cscope/command.c
--- global-6.6.2/gtags-cscope/command.c	2018-02-09 10:46:32 +1000
+++ global-6.6-2/gtags-cscope/command.c	2018-02-14 18:37:50 +1000
@@ -404,6 +404,13 @@ cscope: cannot open pipe to shell comman
 	    return(NO);
 	}
 	strbuf_clear(sb);
+#if defined(_WIN32) && !defined(__CYGWIN__)
+	/*
+	 * Get around CMD.EXE's weird quoting rules by sticking another
+	 * perceived whitespace in front (also works with Take Command).
+	 */
+	strbuf_putc(sb, ';');
+#endif
 	strbuf_puts(sb, quote_shell(global_command));
 	strbuf_sprintf(sb, " %s %s > %s", globaloption, quote_shell(newpat), temp2);
 	remove(temp2);
diff -urp global-6.6.2/gtags-cscope/find.c global-6.6-2/gtags-cscope/find.c
--- global-6.6.2/gtags-cscope/find.c	2018-02-09 10:46:32 +1000
+++ global-6.6-2/gtags-cscope/find.c	2018-02-14 18:37:51 +1000
@@ -28,6 +28,13 @@ common(void)
 {
 	STATIC_STRBUF(sb);
 	strbuf_clear(sb);
+#if defined(_WIN32) && !defined(__CYGWIN__)
+	/*
+	 * Get around CMD.EXE's weird quoting rules by sticking another
+	 * perceived whitespace in front (also works with Take Command).
+	 */
+	strbuf_putc(sb, ';');
+#endif
 	strbuf_sprintf(sb, "%s --encode-path=\" \t\" --result=cscope", quote_shell(global_command));
 	if (caseless == YES)
 		strbuf_puts(sb, " -i");
diff -urp global-6.6.2/libutil/abs2rel.c global-6.6-2/libutil/abs2rel.c
--- global-6.6.2/libutil/abs2rel.c	2018-02-09 10:46:33 +1000
+++ global-6.6-2/libutil/abs2rel.c	2018-02-14 17:39:34 +1000
@@ -38,6 +38,7 @@
 #include "path.h"
 #if defined(_WIN32) || defined(__DJGPP__)
 #include "checkalloc.h"
+#include <ctype.h>
 #define LOCATEFLAG MATCH_AT_FIRST|IGNORE_CASE
 #define PATHCHAR(c) tolower(c)
 #else
diff -urp global-6.6.2/libutil/path.c global-6.6-2/libutil/path.c
--- global-6.6.2/libutil/path.c	2018-02-09 10:46:33 +1000
+++ global-6.6-2/libutil/path.c	2018-02-14 17:42:24 +1000
@@ -163,6 +163,7 @@ canonpath(char *path)
 }
 
 #if (defined(_WIN32) && !defined(__CYGWIN__)) || defined(__DJGPP__)
+#include "checkalloc.h"
 /**
  * realpath: get the complete path
  *
@@ -173,6 +174,8 @@ canonpath(char *path)
 char *
 realpath(const char *in_path, char *out_path)
 {
+	if (out_path == NULL)
+		out_path = check_malloc(MAXPATHLEN);
 #ifdef __DJGPP__
 	/*
 	 * I don't use _fixpath or _truename in LFN because neither guarantee
diff -urp global-6.6.2/libutil/secure_popen.c global-6.6-2/libutil/secure_popen.c
--- global-6.6.2/libutil/secure_popen.c	2018-02-09 10:46:33 +1000
+++ global-6.6-2/libutil/secure_popen.c	2018-02-14 17:56:59 +1000
@@ -18,6 +18,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#if !((defined(_WIN32) && !defined(__CYGWIN__)) || defined(__DJGPP__))
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
@@ -96,3 +97,4 @@ secure_pclose(FILE *ip)
 
 	return (ppid == -1 ? -1 : status);
 }
+#endif