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Adhemerval Zanella wrote:
Another approach that does not involve adding compat symbols (which adds a lot of code complexity inside glibc build and do not solve 'make' builds against new glibc) would to make GLOB_ALTDIRFUNCS to follow the old semantic of using gl_stat instead of gl_lstat while making glob without GLOB_ALTDIRFUNCS works as intended. And add another flag, GLOB_ALTDIRFUNCS2, which actually uses gl_lstat.
Although that's clever, it is a gratuitous source-code incompatibility with BSD, which is not a good thing. To some extent it's just GLOB_FOLLOW and GLOB_NOFOLLOW in disguise, and disguise is not a good thing in APIs. So I think I still prefer the compat symbol approach.
We'll get GNU 'Make' fixed, and I wouldn't worry overly much about people building unpatched 'Make' with new glibc. I filed a Make bug report is here:
http://lists.gnu.org/archive/html/bug-make/2017-09/msg00014.html
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