C + + and database postgres link! Will you please define the problem in C + + database linking postgres I also saw some in this forum the way to solve the problem, but I now emerging issues in those issues. Below is a simple test procedure : #include "Libpq++.h" Int main () { PgDatabase data ( "host= 192.168.0.2 port=5432 dbanme=test user=test password=123456"); Return 0 } Translation errors occur when : /tmp/ccPkMM7Z.o (. Gnu.linkonce.t._ZN10PgDatabaseC1EPKc+0x10) : In function `PgDatabase : O : PgDatabase[in-charge] (char const*) 'O : : : : O undefined reference to `PgConnection PgConnection[not-in-charge] (char const*) ' /tmp/ccPkMM7Z.o (. Gnu.linkonce.t._ZN10PgDatabaseD1Ev+0x16) : O : : In function `PgDatabase ~PgDatabase [in-charge] () 'O : : : : O undefined reference to `PgConnection ~PgConnection [not-in-charge] () ' /tmp/ccPkMM7Z.o (. Gnu.linkonce.t._ZN10PgDatabaseD0Ev+0x16) : In function `PgDatabase : O : ~PgDatabase [in-charge deleting] () 'O : : : : O undefined reference to `PgConnection ~PgConnection [not-in-charge] () ' /tmp/ccPkMM7Z.o (. Gnu.linkonce.d._ZTI10PgDatabase+0x8) : O undefined reference to `typeinfo for PgConnection ' Translation Function never appeared libpq++.h definition, we do not know why? Libpq++.h loading time is a problem? Please know gets advice Thank you! Canada reservoir yet? -l*** Get! Is not increased before the bank can not understand why this is necessary, we can set up, on any increase in the future? Plus what the rules are there? [ Closed window ]