asyropoulos@xxxxxxx writes: > After a careful study I have concluded and confirmed that the > following patches solve the problem I reported. > In addition, the corresponding file of the compiler that is bundled > with OpenSolaris/OpenIndiana/Solaris 11 Express > has the same setting. > /* Define to use concept checking code from the boost libraries. */ > -#define _GLIBCXX_CONCEPT_CHECKS 1 > +/* #undef _GLIBCXX_CONCEPT_CHECKS */ This implies that when your compiler was built, it was configured with --enable-concept-checks . Apparently that is incorrect or buggy. http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt02ch05s02.html Ian