it is used, and rejects attempts to use dangerous options or operands.
You can use an alias or script instead.
+ Installed programs like 'zgrep' now use the PATH environment variable
+ as usual to find subsidiary programs like 'gzip' and 'grep'.
+ Previously they prepended the installation directory to the PATH,
+ which sometimes caused 'make check' to test the wrong gzip executable.
+ [bug introduced in gzip-1.3.13]
+
** New features
gzip now accepts the --synchronous option, which causes it to use