Fix error pointed out by gcc10
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Upstream-Status: Pending
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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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--- a/sigscheme/libgcroots/include/private/gc_priv.h
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+++ b/sigscheme/libgcroots/include/private/gc_priv.h
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@@ -2026,7 +2026,7 @@ void GC_err_puts(const char *s);
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# if defined(NEED_FIND_LIMIT) || \
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defined(USE_PROC_FOR_LIBRARIES) && defined(THREADS)
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-JMP_BUF GC_jmp_buf;
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+extern JMP_BUF GC_jmp_buf;
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/* Set up a handler for address faults which will longjmp to */
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/* GC_jmp_buf; */
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