[PATCH] RISC-V: define _REENTRANT with -pthread

[Andreas Schwab]

This is expected by the AX_PTHREAD autoconf macro from
<http://www.gnu.org/software/autoconf-archive/ax_pthread.html>.

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

diff --git a/gcc/config/riscv/linux.h b/gcc/config/riscv/linux.h
index 1da1b0a74e..ad03654e8d 100644
--- a/gcc/config/riscv/linux.h
+++ b/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} \
-- 
2.16.1


-- 
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."