I downloaded the source code and compile it successfully. I want to set the NSIS_CONFIG_LOG on and change the value of NSIS_MAX_STRLEN, but when searching in google, I found there are all for the old version. In the new one, I didn't find the defination of NSIS_MAX_STRLEN. Later I found that the config header file would be created by SCons script, so I thought I only need to edit the top of the file .\SCons\config.py:
'defines the maximum string length for internal variables and stack entries...',
Is it right?