[PATCH] tst-unique4.cc: Explicitly instantiate S<N>::i

[H.J. Lu]

Explicitly instantiate S<N>::i to silence Clang error:

tst-unique4.cc:8:11: error: instantiation of variable 'S<1>::i' required here, but no definition is available [-Werror,-Wundefined-var-template]
    8 |     S<1>::i, S<2>::i, S<3>::i, S<4>::i, S<5>::i, S<6>::i, S<7>::i, S<8>::i,
      |           ^
./tst-unique4.h:5:14: note: forward declaration of template entity is here
    5 |   static int i;
      |              ^
tst-unique4.cc:8:11: note: add an explicit instantiation declaration to suppress this warning if 'S<1>::i' is explicitly instantiated in another translation unit
    8 |     S<1>::i, S<2>::i, S<3>::i, S<4>::i, S<5>::i, S<6>::i, S<7>::i, S<8>::i,
      |           ^

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
---
 elf/tst-unique4.cc | 49 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/elf/tst-unique4.cc b/elf/tst-unique4.cc
index 575c70d3a1..f38d7c094f 100644
--- a/elf/tst-unique4.cc
+++ b/elf/tst-unique4.cc
@@ -3,6 +3,55 @@
 
 #include <cstdio>
 
+template<>
+int S<1>::i = 1;
+template<>
+int S<2>::i = 2;
+template<>
+int S<3>::i = 3;
+template<>
+int S<4>::i = 4;
+template<>
+int S<5>::i = 5;
+template<>
+int S<6>::i = 6;
+template<>
+int S<7>::i = 7;
+template<>
+int S<8>::i = 8;
+template<>
+int S<9>::i = 9;
+template<>
+int S<10>::i = 10;
+template<>
+int S<11>::i = 11;
+template<>
+int S<12>::i = 12;
+template<>
+int S<13>::i = 13;
+template<>
+int S<14>::i = 14;
+template<>
+int S<15>::i = 15;
+template<>
+int S<16>::i = 16;
+template<>
+int S<17>::i = 17;
+template<>
+int S<18>::i = 18;
+template<>
+int S<19>::i = 19;
+template<>
+int S<20>::i = 20;
+template<>
+int S<21>::i = 21;
+template<>
+int S<22>::i = 22;
+template<>
+int S<23>::i = 23;
+template<>
+int S<24>::i = 24;
+
 static int a[24] =
   {
     S<1>::i, S<2>::i, S<3>::i, S<4>::i, S<5>::i, S<6>::i, S<7>::i, S<8>::i,
-- 
2.47.1