Ok, it works the same on Cygwin and Linux/x86, but Python/NTAMD64 works.
Somehow Python/Posix related, portably.
For anyone interested:
$ echo %%> conftest.l
$ echo %%>> conftest.l
$ rm lex.yy.c
$ export M4=foo
$ flex conftest.l
flex: fatal internal error, exec failed
lex.yy.c exists
$ rm lex.yy.c
$ python -c "import os; os.system(\"flex conftest.l\")"
flex: fatal internal error, exec failed
flex: 2 error writing output file lex.yy.c (I added the "2" to disambiguate
4 identical error messages)
lex.yy.c does not exists -- make configure-gmp fails
relevant code in flex:
filter_tee_header:
if ((to_cfd = dup (1)) == -1)
flexfatal (_("dup(1) failed"));
to_c = fdopen (to_cfd, "w");
...
fflush (to_c);
if (ferror (to_c))
lerrsf (_("2 error writing output file %s"),
outfilename ? outfilename : "");
else if (fclose (to_c))
lerrsf (_("error closing output file %s"),
outfilename ? outfilename : "");
while (wait (0)> 0) ;
again, I added the "2".
Digging deeper...
- Jay
[snip snip snip]
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