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Branches: main, 10.04 Avoid warnings from the mgnuc script on MinGW, Cygwin and Solaris when compiling the source distribution. The warnings are from the "which" command, which is used in the mgnuc script when checking for the presence of the mfiltercc utility program. (If the command named in the argument to which cannot be found on the above systems it fails rather noisily rather than just setting a non-zero exist status as on Linux and Mac OS X.) The solution is to ensure that mfiltercc is built before anything that requires it. Mmakefile: Add a new top-level target util_no_rt that builds those programs in the util directory that do not depend on anything in the runtime directory. scripts/mgnuc.in: scripts/mgnuc_file_opt.sh-subr: Add a new option, --no-filter-cc, that tells mgnuc not to bother filtering the warning output of the C compiler. util/Makefile: Compile mfiltercc with --no-filter-cc since for the source distribution it obviously won't exist until we do compile it. util/mfiltercc.c: Add a note at the top of this file mentioning the requirement that it not depend on anything in the runtime directory.