On 19/08/2016 10:13, Steven G. Kargl wrote:
On Fri, Aug 19, 2016 at 01:14:32AM +0200, Tijl Coosemans wrote:
On Thu, 18 Aug 2016 14:48:28 +0200 Dimitry Andric <[email protected]> wrote:
how would you solve the problem of having
multiple, possibly incompatible versions of the same library in
different directories?
For example, on one of my systems, I now have these:
/usr/local/lib/gcc47/libgcc_s.so.1
/usr/local/lib/gcc48/libgcc_s.so.1
/usr/local/lib/gcc49/libgcc_s.so.1
/usr/local/lib/gcc5/libgcc_s.so.1
/usr/local/lib/gcc6/libgcc_s.so.1
/usr/local/lib/gcc7/libgcc_s.so.1
So which one are you going to put at the front of the path? The gcc7
version? If you are lucky that one is backwards compatible with all the
previous ones,
You should find that all newer copies of libgcc_s contain compatibility
support for binaries that were linked to earlier versions.
For the gcc policy on library ABI compatibility read -
http://gcc.gnu.org/onlinedocs/libstdc++/manual/abi.html
You can find the ABI versions contained in each library -
% strings /usr/lib/libgcc_s.so | grep 'GCC_[0-9]' | sort -u
GCC_3.0
GCC_3.3
GCC_3.3.1
GCC_3.4
GCC_3.4.2
GCC_3.4.4
GCC_4.0.0
GCC_4.2.0
GCC_4.3.0
% strings /usr/local/lib/gcc48/libgcc_s.so.1 | grep 'GCC_[0-9]' | sort -u
GCC_3.0
GCC_3.3
GCC_3.3.1
GCC_3.4
GCC_3.4.2
GCC_3.4.4
GCC_4.0.0
GCC_4.2.0
GCC_4.3.0
GCC_4.6.0
GCC_4.7.0
GCC_4.8.0
--
FreeBSD - the place to B...Software Developing
Shane Ambler
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