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copied from http://www.nabble.com/-PATCH--Define-RTLD_SINGLE_THREAD_P-on-ARM-tf3814888.html
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--- glibc-2.6/glibc-ports-2.6.1/sysdeps/unix/sysv/linux/arm/nptl/sysdep-cancel.h 2007-07-03 11:03:16.000000000 +0200
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+++ glibc-2.6/ports/sysdeps/unix/sysv/linux/arm/nptl/sysdep-cancel.h 2007-07-03 11:04:30.000000000 +0200
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@@ -126,3 +126,9 @@
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# define NO_CANCELLATION 1
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#endif
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+
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+#ifndef __ASSEMBLER__
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+# define RTLD_SINGLE_THREAD_P \
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+ __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
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+ header.multiple_threads) == 0, 1)
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+#endif
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