[bug-grep] grep-2.6: source code errors and environment-variable confusion

[Nelson H. F. Beebe]

Builds of grep-2.6 with native (non-gcc) compilers fail on several
systems because of source code errors:

    CC       grep.o
    "grep.c", line 10: void function cannot return value
    "grep.c", line 16: void function cannot return value
    "grep.c", line 22: void function cannot return value
    cc: acomp failed for grep.c

On at least one system, I got a failure of the foad1 test.
Examination of the saved output showed that the differences were from
colorization; once I did a

        unsetenv GREP_COLOR

and reran the tests, they passed.

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- Nelson H. F. Beebe                    Tel: +1 801 581 5254                  -
- University of Utah                    FAX: +1 801 581 4148                  -
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