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Some symbols have to be identified process-wide by their name. This is particularly important for some C++ features (e.g., class local static data and static variables in inline functions). This cannot completely be implemented with ELF functionality so far. The STB_GNU_UNIQUE binding helps by ensuring the dynamic linker will always use the same definition for all symbols with the same name and this binding.
21 lines
351 B
C
21 lines
351 B
C
#include <config.h>
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#ifdef HAVE_ASM_UNIQUE_OBJECT
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# define S(s) _S (s)
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# define _S(s) #s
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asm (".data;"
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S (ASM_GLOBAL_DIRECTIVE) " var\n"
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".type var, " S (ASM_TYPE_DIRECTIVE_PREFIX) "gnu_unique_object\n"
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".size var, 4\n"
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"var:.zero 4\n"
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".previous");
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extern int var;
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int
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f (int *p)
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{
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return &var != p || *p != 1;
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}
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#endif
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