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The spreg.[ch] files live in the source tree now and are created
with the dgen.py script, so we don't need this old tool anymore.
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Simplify the generator by always outputting the switch tables, and
leave the choice of whether to use them to the compiler via a -D
flag.
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Nothing passes this to dgen, and even if it did, nothing would happen
because the generated spreg.[ch] files don't include any references
back to the original data table. So drop it to simplify.
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Since we know we'll return 0 by default, we don't have to output case
statements for readonly or length fields whose values are also zero.
This is the most common case by far and thus generates a much smaller
switch table in the end.
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Instead of writing:
case 1:
return 1;
case 2:
return 1;
...etc...
Output a single return so we get:
case 1:
case 2:
case ...
return 1;
This saves ~100 lines of code. Hopefully the compiler was already
smart enough to optimize to the same code, but if not, this probably
helps there too :).
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This saves a single line for the same result. By itself, it's not
interesting, but we can further optimize the generated output and
completely omit the switch table in some cases. Which we'll do in
follow up commits.
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This internal table is only ever read, so constify it.
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Because of a Libiberty hack, getopt on GNU libc (2.25 or earlier) is
currently unusable on sim, causing a regression on CentOS 7.
This is caused as follows:
1. If HAVE_DECL_GETOPT is defined (getopt declaration with known prototype
is detected while configuration), a declaration of getopt in
"include/getopt.h" is suppressed.
The author started to define HAVE_DECL_GETOPT in sim with the commit
340aa4f6872c ("sim: Check known getopt definition existence").
2. GNU libc (2.25 or earlier)'s <unistd.h> includes <getopt.h> with a
special purpose macro defined to declare only getopt function but due
to include path (not tested while configuration), it causes <unistd.h>
to include Libiberty's "include/getopt.h".
3. If both 1. and 2. are satisfied, despite that <unistd.h> tries to
declare getopt by including <getopt.h>, "include/getopt.h" does not do
so, causing getopt function undeclared.
Getting rid of "include/getopt.h" (e.g. renaming this header file) is the
best solution to avoid hacking but as a short-term solution, this commit
replaces getopt with getopt_long under sim/.
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The ppc codebase is unique and doesn't leverage common/, so have to
add silent rules to it specifically.
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Since we require C11 now, we can assume many headers exist, and
clean up all of the conditional includes. It's not like any of
this code actually accounted for the headers not existing, just
whether we could include them.
The strings.h cleanup is a little nuanced: it isn't in C11, but
every use of it in the codebase will include strings.h only if
string.h doesn't exist. Since we now assume the C11 string.h
exists, we'll never include strings.h, so we can delete it.
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sim/ChangeLog:
Update old contact info in GPL license notices.
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gdb/sim/ChangeLog:
Update the non-FSF-copyrighted files in sim to GPLv3 or later.
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file desecribing the build machine.
* configure: Regenerate.
* lf.c: Include build-config.h instead of config.h.
* dgen.c: Likewise.
* igen.c: Likewise.
* misc.c: Likewise.
* misc.h: Likewise.
* filter.c: Likewise.
* table.c: Likewise.
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