On 11/23/2015 04:33 PM, Michael Eager wrote:
Hi -- I'm trying to build an application on CentOS 7 which can run on older versions of CentOS. I'm running into problems with versioning of memcpy in Glibc. Executables built on CentOS 7 require memcpy from glibc-2.14, which causes the program not to load on systems with older versions of glibc. My online search suggests to add an asm() with a .symver option to select memcpy from glibc-2.2.5 in each of the source files which reference memcpy(). This isn't practical with a program with tens of thousands of source files. Does anyone have a reasonable solution?
IMO you should really be building your app on an older Centos version (5 or 6). Then your binary should run everywhere, though it may sometimes require installing a -compat package.
An alternative is to link everything statically. Not as good a solution, as it introduces security concerns.
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