* configure.in: Add a check for the Darwin dynamic linker. Use
AC_TRY_LINK when checking for "nonposix getpwuid_r" so it notices
"no getpwuid_r" correctly.
* testglib.c (main): Make template[] bigger to prevent an overrun.
Remove an unused variable. Initialize error to NULL.
* tests/gio-test.c (main): Add a cast to prevent a warning when
size_t is a long.
* tests/type-test.c (main): Add an #ifdef to prevent a warning
when G_HAVE_GINT64 is defined and G_GINT64_FORMAT isn't.