Horton

Re: Unused header file inclusion

Tom Lane <tgl@sss.pgh.pa.us>

View thread View on postgr.es
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andres Freund <andres@anarazel.de>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>, vignesh C <vignesh21@gmail.com>, Pg Hackers <pgsql-hackers@postgresql.org>
Date: 2019-08-18T18:37:34Z
Lists: pgsql-hackers

Attachments

Andres Freund <andres@anarazel.de> writes:
> I've pushed the other ones.

Checking whether header files compile standalone shows you were overly
aggressive about removing fmgr.h includes:

In file included from /tmp/headerscheck.Ss8bVx/test.c:3:
./src/include/utils/selfuncs.h:143: error: expected declaration specifiers or '...' before 'FmgrInfo'
./src/include/utils/selfuncs.h:146: error: expected declaration specifiers or '...' before 'FmgrInfo'
./src/include/utils/selfuncs.h:152: error: expected declaration specifiers or '...' before 'FmgrInfo'

That's with a script I use that's like cpluspluscheck except it tests
with plain gcc not g++.  I attached it for the archives' sake.

Oddly, cpluspluscheck does not complain about those cases, but it
does complain about

In file included from /tmp/cpluspluscheck.FgX2SW/test.cpp:4:
./src/bin/scripts/scripts_parallel.h:18: error: ISO C++ forbids declaration of 'PGconn' with no type
./src/bin/scripts/scripts_parallel.h:18: error: expected ';' before '*' token
./src/bin/scripts/scripts_parallel.h:29: error: 'PGconn' has not been declared

(My headerscheck script is missing that header; I need to update it to
match the latest version of cpluspluscheck.)

			regards, tom lane

Commits

  1. Add fmgr.h include to selfuncs.h.

  2. Add "headerscheck" script to test header-file compilability under C.

  3. Fix failure-to-compile-standalone in scripts_parallel.h.

  4. Remove fmgr.h includes from headers that don't really need it.

  5. Don't include utils/array.h from acl.h.

  6. Remove redundant prototypes for SQL callable functions.

  7. Remove unnecessary #include <limits.h>

  8. Teach tuplesort.c about "top N" sorting, in which only the first N tuples