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I had not noticed this before, as I've been building OpenBSD with a local brew of libstdc++. Our basic setup only supports libthingy.so.major.minor, without any further subdivision. When gcc 2.8.1 was imported, we became committed to libstdc++.so.28.0. This was before I came aboard OpenBSD, and we can't change that now without annoying many users. Standard policy is that we up major numbers when an incompatible change occurs, and minor number the rest of the time. Based on that assumption, I surmise the transition from libstdc++ 2.8.0 to libstdc++ 2.9.0 should have been a major version number change from the OpenBSD point of view. Well, it gets slightly uglier. Assume we have to change the size of a critical data structure, such as struct stat (such things occurred in the past already, getting uid_t from 16 to 32 bits, or pid_t and friends). In theory, already installed systems won't notice a thing, as the development team will up all version numbers, including libstdc++. I have written the following openbsd.ml snippet to try and solve the problem (code not tested yet, there might be a minor syntax problem in it. More of a concept than actual code) MAJOR_OFFSET=0 EGCS_MAJOR = `echo $(VERSION)` | sed 's/([0-9]*)\.([0-9]*).*/\1\2/'` EGCS_MINOR = `echo $(VERSION)` | sed 's/.*\.([0-9]+)/\1/'` MSHLINK = libstdc++.so.`expr $(EGCS_MAJOR)+MAJOR_OFFSET`.$(EGCS_MINOR) The EGCS_MAJOR/EGCS_MINOR variables get the libstdc++ version number in a format that conforms to what OpenBSD uses for version numbers. MAJOR_OFFSET is the define that is, more or less, under OpenBSD control. Everything should work fine as long as I crank it whenever it is needed (which shouldn't be too often, probably once every six months on average). Comments welcome... I'm not very satisfied with the way I've done things, but this is a real-life problem, and it needs to be solved, unless I want to go the way H.J.Lu and linux goes, and `prepare' OpenBSD specific egcs distributions. -- Marc Espie |anime, sf, juggling, unicycle, acrobatics, comics... |AmigaOS, OpenBSD, C++, perl, Icon, PostScript... | `real programmers don't die, they just get out of beta'