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# DP: Fix PR target/84475, taken from the trunk

gcc/

2018-02-13  Andreas Schwab  <schwab@suse.de>

	* config/riscv/linux.h (CPP_SPEC): Define.

Index: b/src/gcc/config/riscv/linux.h
===================================================================
--- a/src/gcc/config/riscv/linux.h
+++ b/src/gcc/config/riscv/linux.h
@@ -47,6 +47,8 @@ along with GCC; see the file COPYING3.  If not see
 
 #define ICACHE_FLUSH_FUNC "__riscv_flush_icache"
 
+#define CPP_SPEC "%{pthread:-D_REENTRANT}"
+
 #define LINK_SPEC "\
 -melf" XLEN_SPEC "lriscv \
 %{shared} \