On Tue, Oct 07, 2014 at 04:23:54PM +0800, Chow Loong Jin wrote: > On Tue, Oct 07, 2014 at 09:37:48AM +0200, Mathieu Malaterre wrote: > > I am starring at bug #758572. Basically OP reports that `cmake` is > > underlinked, which is a serious issue as per policy. However when > > reading the details it appears that this is a c++ weak symbol (AFAIK > > no weak default definition is available). This weak symbol is > > generated by default by gcc when using part of the STL (See > > #758572#13).
No, he shows that using a different libcurl makes ld.so barf. He provides no evidence that the weak symbol is the reason for this. > > Could someone please remind me in which case weak symbols (no weak > > default definition) can trigger an undefined behavior at runtime ? > I think UB is only triggered if something attempts to use the symbol. Is > cmake pulling in > another library that uses libpthread but doesn't link it in? No, this is perfectly valid. Weak symbols are initialized to zero if no definition is found. Bastian -- Those who hate and fight must stop themselves -- otherwise it is not stopped. -- Spock, "Day of the Dove", stardate unknown -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/20141007174834.ga21...@mail.waldi.eu.org