Use explicit instantiation declaration and definition to silence Clang
error:
tst-unique3.cc:6:18: error: instantiation of variable 'S<char>::i' required here, but no definition is available [-Werror,-Wundefined-var-template]
6 | int t = S<char>::i;
| ^
./tst-unique3.h:5:14: note: forward declaration of template entity is here
5 | static int i;
| ^
tst-unique3.cc:6:18: note: add an explicit instantiation declaration to suppress this warning if 'S<char>::i' is explicitly instantiated in another translation unit
6 | int t = S<char>::i;
| ^
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>
clang warns that the instantiation of the variable is required,
but no definition is available. They are implemented on
tst-unique4lib.so.
Checked on x86_64-linux-gnu.
Reviewed-by: Sam James <sam@gentoo.org>
This patch fixes a warning "tst-unique4lib.cc:17:12: warning: 'b'
defined but not used [-Wunused-variable]". I'm not sure exactly what
aspects of the test are or are not significant for the issue it is
testing for; the patch makes the minimal change of marking the
variable with __attribute__ ((used)).
Tested for x86_64.
* elf/tst-unique4lib.cc (b): Mark with __attribute__ ((used)).
H.J. Lu
Adhemerval Zanella
Torvald Riegel
Joseph Myers
Piotr Bury