linker_set: fix globl/weak symbol redefinitions to work on clang 12
In clang 12.0.0.rc2, going from weak to global is now a hard error: ``` /usr/src/stand/libsa/amd64/_setjmp.S:67:25: error: _longjmp changed binding to STB_GLOBAL .text; .p2align 4,0x90; .globl _longjmp; .type _longjmp,@function; _longjmp:; .cfi_startproc ``` And the other way is a warning, but we have -Werror: ``` error: __start_set_Xcommand_set changed binding to STB_WEAK [-Werror,-Winline-asm] error: __stop_set_Xcommand_set changed binding to STB_WEAK [-Werror,-Winline-asm] ``` ref: https://reviews.llvm.org/D90108 Reviewed By: arichardson MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D29159
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@ -563,8 +563,8 @@
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#endif /* __STDC__ */
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#endif /* __GNUC__ */
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#define __GLOBL1(sym) __asm__(".globl " #sym)
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#define __GLOBL(sym) __GLOBL1(sym)
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#define __GLOBL(sym) __asm__(".globl " __XSTRING(sym))
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#define __WEAK(sym) __asm__(".weak " __XSTRING(sym))
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#if defined(__GNUC__)
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#define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
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@ -60,8 +60,8 @@
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*/
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#ifdef __GNUCLIKE___SECTION
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#define __MAKE_SET_QV(set, sym, qv) \
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__GLOBL(__CONCAT(__start_set_,set)); \
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__GLOBL(__CONCAT(__stop_set_,set)); \
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__WEAK(__CONCAT(__start_set_,set)); \
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__WEAK(__CONCAT(__stop_set_,set)); \
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static void const * qv \
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__set_##set##_sym_##sym __section("set_" #set) \
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__nosanitizeaddress \
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