On 2025/12/12 3:28 PM, Andreas Metzler via Exim-users wrote:
I have been playing around with dlopened lookups modules, but they do
not end up being linked against the respective library:
make[2]: Entering directory '/tmp/EXIM4/exim4/build-Linux-x86_64/lookups'
cc -shared sqlite.c
cc -lsqlite3 -DDYNLOOKUP -shared -rdynamic -fPIC -O -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -I/usr/include/p11-kit-1 -I/usr/include/p11-kit-1
sqlite.c -o sqlite.so
Even after re-ordering that cmdline I get "NEEDED" items.
My test build:
$ make FULLECHO=''
cc -shared sqlite.c
cc -DDYNLOOKUP -shared -rdynamic -fPIC -O -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -Werror=implicit-function-declaration -Wmaybe-uninitialized
-Wunused-value -fPIC -Wpointer-sign -DDYNLOOKUP -shared -rdynamic -fPIC -O
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
-Werror=implicit-function-declaration -Wmaybe-uninitialized -Wunused-value
-fPIC -Wpointer-sign sqlite.c -lsqlite3 -o sqlite.so
[...]
$ objdump -p ./build-Linux-x86_64/dynmodules/sqlite_lookup.so | grep NEEDED
NEEDED libsqlite3.so.0
NEEDED libc.so.6
$
[ I'm not sure how you managed to *not* get libsqlite3.so needed; any way I
tried to
force that resulted in the testsuite claiming that sqlite was not included -
I think
because the "exim -bV" stage did not show it in the "lookups (dynamic)"
section, in
turn because the modload faied.
But with that pair of NEEDED items, the testcase for sqlite lookups passes
(modulo
debug output differences related to all the modules I'd built).
]
So, while I'm not averse to shuffling that line for style, I think it has no
effect.
--
Cheers,
Jeremy
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