Hello, If there have been changes in the API over time, shouldn't there have been some changes to the .so (dynamic library) versioning in the Makefile (as per accepted standards)? I see nothing interesting about such versioning there.
I'll likely start using it as a static library as you said, but I still remain curious about the dynamic library versioning. It seems like was just stuck at 0 since the beginning. Mar 23, 2023, 05:53 by h...@symas.com: > Sam Dave wrote: > >> Hello, >> >> Thanks in advance for some clues on the below: >> >> 1. >> Has there ever been a release of LMDB that adds/removes/changes API? >> > > There have been additions to the API over time. > >> 2. >> On both Debian 10 (with lmdb 0.9.22) and Debian 11 (with lmdb 0.9.24) , >> under lib/ I see >> >> liblmdb.so -> liblmdb.so.0 (symlink) >> liblmdb.so.0 -> liblmdb.so.0.0.0 (symlink) >> liblmdb.so.0.0.0 (the original file) >> >> Has this always been at 0.0.0 since the beginning of LMDB? From the point of >> view of what the LMDB developers would expect, I mean. (I have no idea which >> distros were distributing LMDB in the early days) >> >> 3. >> What are your intentions regarding this .so versioning in relation to >> adding/removing/changes to the API? >> Something like this, perhaps? >> https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html >> >> 4. >> Another Linux distribution (NixOS 22.11, with lmdb 0.9.29) has *only* this >> under lib/: >> >> liblmdb.so (the original file) >> >> Does this sound right to you? >> What I mean is, when people compile LMDB down to an .so, would you expect >> them to normally add a version after the ".so"? (As they apparently did in >> Debian) >> > > Read the makefile and see. > > Currently liblmdb compiles down to about 110KB of x86-64 object code as a > static library, and 125KB as a shared library. > IMO it is a waste of effort to use it as a shared library since it's such a > tiny piece of code; it should just be > statically linked into every project that uses it. (Also the performance > difference between static and dynamic linking > is a measurable proportion of liblmdb runtime, so it's just better to build > and link it statically.) > > -- > -- Howard Chu > CTO, Symas Corp. http://www.symas.com > Director, Highland Sun http://highlandsun.com/hyc/ > Chief Architect, OpenLDAP http://www.openldap.org/project/ >
