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tb Makefile: use clang++-16 explicitly, because clang++-18 (now default on Ubuntu 24.04) has a >20x compile time regression

This commit is contained in:
Luke Wren 2024-05-27 11:06:50 +01:00
parent 78a5cb98ea
commit 5b31e26790
1 changed files with 9 additions and 5 deletions
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14
test/sim/tb_cxxrtl/Makefile
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@ -1,10 +1,14 @@
# To build single-core dual-port tb: make
# To build dual-core single-port tb: make DOTF=tb_multicore.f
TOP := tb
DOTF := tb.f
CONFIG := default
TBEXEC := $(patsubst %.f,%,$(DOTF))
TOP := tb
DOTF := tb.f
CONFIG := default
TBEXEC := $(patsubst %.f,%,$(DOTF))
# Note: clang++-18 has a >20x compile time regression, even at low
# optimisation levels. I have tried clang++-16 and clang++-17, both fine.
CLANGXX := clang++-16
.PHONY: clean all
@ -24,4 +28,4 @@ clean::
rm -rf build-$(DOTF) $(TBEXEC)
$(TBEXEC): build-$(DOTF)/dut.cpp tb.cpp
clang++ -O3 -std=c++14 $(addprefix -D,$(CDEFINES) $(CDEFINES_$(DOTF))) -I $(shell yosys-config --datdir)/include/backends/cxxrtl/runtime -I build-$(DOTF) tb.cpp -o $(TBEXEC)
$(CLANGXX) -O3 -std=c++14 $(addprefix -D,$(CDEFINES) $(CDEFINES_$(DOTF))) -I $(shell yosys-config --datdir)/include/backends/cxxrtl/runtime -I build-$(DOTF) tb.cpp -o $(TBEXEC)