On 11/23/2015 08:06 AM, Nicolas Thierry-Mieg wrote: > 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. That causes a number of other problems, when the only issue is accessing a working version of memcpy from the installed glibc. -- Michael Eager eager at eagercon.com 1960 Park Blvd., Palo Alto, CA 94306 650-325-8077