Hello,
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
[...]
ametzler@argenau:/tmp/EXIM4/exim4$ objdump -p
./build-Linux-x86_64/dynmodules/sqlite_lookup.so | grep NEEDED
NEEDED libc.so.6
ametzler@argenau:/tmp/EXIM4/exim4$ ldd -r
./build-Linux-x86_64/dynmodules/sqlite_lookup.so
linux-vdso.so.1 (0x00007f541dbd4000)
libc.so.6 => /usr/lib/x86_64-linux-gnu/libc.so.6 (0x00007f541d800000)
/lib64/ld-linux-x86-64.so.2 (0x00007f541dbd6000)
undefined symbol: sqlite_lock_timeout
(./build-Linux-x86_64/dynmodules/sqlite_lookup.so)
[...]
I think the cc invocation is not correctly ordered, the -lsqlite3 should
be at the end, i.e.
+++ src/lookups/Makefile
[...]
- $(FE)$(CC) $(LOOKUP_$*_INCLUDE) $(LOOKUP_$*_LIBS) -DDYNLOOKUP
$(CFLAGS_DYNAMIC) $(CFLAGS) $(INCLUDE) $(DLFLAGS) $*.c -o $@
+ $(FE)$(CC) $(LOOKUP_$*_INCLUDE) -DDYNLOOKUP $(CFLAGS_DYNAMIC)
$(CFLAGS) $(INCLUDE) $(DLFLAGS) $*.c -o $@ $(LOOKUP_$*_LIBS)
I can try to come up with a patch if you agree with this premise.
cu Andreas
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