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42 lines
1.4 KiB
Diff
42 lines
1.4 KiB
Diff
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From 87c347c2897537a6aa391efbfc5ed00c625434fe Mon Sep 17 00:00:00 2001
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From: Romain Naour <romain.naour@gmail.com>
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Date: Tue, 2 May 2023 14:21:55 +0200
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Subject: [PATCH] RISC-V: fix build issue with gcc 4.9.x
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GCC should still build with GCC 4.8.3 or newer [1]
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using C++03 by default. But a recent change in
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RISC-V port introduced a C++11 feature "std::log2" [2].
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Use log2 from the C header, without the namespace [3].
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[1] https://gcc.gnu.org/install/prerequisites.html
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[2] https://gcc.gnu.org/git/?p=gcc.git;a=patch;h=7caa1ae5e451e780fbc4746a54e3f19d4f4304dc
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[3] https://stackoverflow.com/questions/26733413/error-log2-is-not-a-member-of-std
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Fixes:
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https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/4202276589
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gcc/ChangeLog:
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* config/riscv/genrvv-type-indexer.cc: Use log2 from the C header, without
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the namespace.
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Signed-off-by: Romain Naour <romain.naour@gmail.com>
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---
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gcc/config/riscv/genrvv-type-indexer.cc | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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--- a/gcc/config/riscv/genrvv-type-indexer.cc
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+++ b/gcc/config/riscv/genrvv-type-indexer.cc
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@@ -115,9 +115,9 @@
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if (sew == eew)
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elmul_log2 = lmul_log2;
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else if (sew > eew)
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- elmul_log2 = lmul_log2 - std::log2 (sew / eew);
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+ elmul_log2 = lmul_log2 - log2 (sew / eew);
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else /* sew < eew */
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- elmul_log2 = lmul_log2 + std::log2 (eew / sew);
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+ elmul_log2 = lmul_log2 + log2 (eew / sew);
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if (float_p)
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return floattype (eew, elmul_log2);
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