gcc 12.1.0 warning

Hi,

Not sure if these compiler-mutterings are worth reporting but I guess
we're trying to get a silent compile.

System: Debian 4.9.303-1 (2022-03-07) x86_64 GNU/Linux
Compiling with gcc 12.1.0 causes the below 'warning' and 'note'.
Compiling with --enable-cassert --enable-debug is silent, no warnings)

In function ‘guc_var_compare’,
inlined from ‘bsearch’ at
/usr/include/x86_64-linux-gnu/bits/stdlib-bsearch.h:33:23,
inlined from ‘find_option’ at guc.c:5649:35:
guc.c:5736:38: warning: array subscript ‘const struct config_generic[0]’
is partly outside array bounds of ‘const char[8]’ [-Warray-bounds]
5736 | return guc_name_compare(confa->name, confb->name);
| ~~~~~^~~~~~

guc.c: In function ‘find_option’:
guc.c:5636:25: note: object ‘name’ of size 8
5636 | find_option(const char *name, bool create_placeholders, bool
skip_errors,
| ~~~~~~~~~~~~^~~~

(Compiling with gcc 6.3.0 does not complain.)

Below are the two configure lines, FWIW.

Erik Rijkers

# cassert-build: no warning/note
./configure \
--prefix=/home/aardvark/pg_stuff/pg_installations/pgsql.HEAD \
--bindir=/home/aardvark/pg_stuff/pg_installations/pgsql.HEAD/bin \
--libdir=/home/aardvark/pg_stuff/pg_installations/pgsql.HEAD/lib \
--with-pgport=6515 --quiet --enable-depend \
--enable-cassert --enable-debug \
--with-openssl --with-perl --with-libxml --with-libxslt --with-zlib \
--enable-tap-tests --with-extra-version=_0506_HEAD_701d --with-lz4

# normal build: causes warning/note:
./configure \
--prefix=/home/aardvark/pg_stuff/pg_installations/pgsql.HEAD \
--bindir=/home/aardvark/pg_stuff/pg_installations/pgsql.HEAD/bin.fast \
--libdir=/home/aardvark/pg_stuff/pg_installations/pgsql.HEAD/lib.fast \
--with-pgport=6515 --quiet --enable-depend \
--with-openssl --with-perl --with-libxml --with-libxslt --with-zlib \
--enable-tap-tests --with-extra-version=_0506_HEAD_701d --with-lz4