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dbc9a40007
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>
26 lines
534 B
C++
26 lines
534 B
C++
#include "tst-unique3.h"
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#include <cstdio>
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#include "../dlfcn/dlfcn.h"
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extern template struct S<char>;
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int t = S<char>::i;
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int
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main (void)
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{
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std::printf ("%d %d\n", S<char>::i, t);
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int result = S<char>::i++ != 1 || t != 1;
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result |= in_lib ();
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void *d = dlopen ("$ORIGIN/tst-unique3lib2.so", RTLD_LAZY);
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int (*fp) ();
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if (d == NULL || (fp = (int(*)()) dlsym (d, "in_lib2")) == NULL)
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{
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std::printf ("failed to get symbol in_lib2\n");
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return 1;
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}
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result |= fp ();
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dlclose (d);
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return result;
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}
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