--- a/mingwmake.bat	Mon Jun 11 09:50:00 2018 +0100
+++ b/mingwmake.bat	Sun Dec 10 00:04:50 2017 +0000
@@ -1,15 +1,18 @@
-@REM -------
-@REM make using mingw gnu compiler
-@REM type mingwmake, and wait...
-@REM do not edit - automatically generated from ProjectDefinition
-@REM -------
-@SET DEFINES=
-
-@pushd ..\rules
-@call find_mingw.bat
-@popd
-make.exe -N -f bc.mak %DEFINES% %USEMINGW_ARG% %*
-
-
-
-
+@REM -------
+@REM make using mingw gnu compiler
+@REM type mingwmake, and wait...
+@REM do not edit - automatically generated from ProjectDefinition
+@REM -------
+@SET DEFINES=
+@REM Kludge got Mercurial, cannot be implemented in Borland make
+@FOR /F "tokens=*" %%i in ('hg root') do SET HGROOT=%%i
+@IF "%HGROOT%" NEQ "" SET DEFINES=%DEFINES% "-DHGROOT=%HGROOT%"
+
+@pushd ..\rules
+@call find_mingw.bat
+@popd
+make.exe -N -f bc.mak %DEFINES% %USEMINGW_ARG% %*
+
+
+
+