Error in gcc-toolchain-builder build

[cllll402]

Is there an existing CVA6 bug for this?

• [X] I have searched the existing bug issues

Bug Description

I encountered a difficulty when building the gcc compiler toolchain, and I don't know how to solve it, can you help me?

I pre-installed the installation package required by the project, set the RISCV path, and obtained the source code of the tool chain.

But when I used the following command, I was told that the command format was wrong, so I used sh build-toolchain.sh gcc-13.1.0-baremetal $INSTALL_DIR command to build with the following error message:

g++ -std=gnu++11 -c -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H -DGENERATOR_FILE -I. -Ibuild -I../../../src/gcc/gcc -I../../../src/gcc/gcc/build -I../../../src/gcc/gcc/../include -I../../../src/gcc/gcc/../libcpp/include \ -o build/genrvv-type-indexer.o ../../../src/gcc/gcc/config/riscv/genrvv-type-indexer.cc ../../../src/gcc/gcc/config/riscv/genrvv-type-indexer.cc: In function ‘std::string same_ratio_eew_type(unsigned int, int, unsigned int, bool, bool)’: ../../../src/gcc/gcc/config/riscv/genrvv-type-indexer.cc:118:30: error: ‘log2’ is not a member of ‘std’ elmul_log2 = lmul_log2 - std::log2 (sew / eew); ^ ../../../src/gcc/gcc/config/riscv/genrvv-type-indexer.cc:118:30: note: suggested alternative: In file included from /usr/include/features.h:375:0, from /usr/include/stdio.h:27, from ../../../src/gcc/gcc/system.h:46, from ../../../src/gcc/gcc/config/riscv/genrvv-type-indexer.cc:18: /usr/include/bits/mathcalls.h:145:1: note: ‘log2’ MATHCALL (log2,, (Mdouble x)); ^ ../../../src/gcc/gcc/config/riscv/genrvv-type-indexer.cc:120:30: error: ‘log2’ is not a member of ‘std’ elmul_log2 = lmul_log2 + std::log2 (eew / sew); ^ ../../../src/gcc/gcc/config/riscv/genrvv-type-indexer.cc:120:30: note: suggested alternative: In file included from /usr/include/features.h:375:0, from /usr/include/stdio.h:27, from ../../../src/gcc/gcc/system.h:46, from ../../../src/gcc/gcc/config/riscv/genrvv-type-indexer.cc:18: /usr/include/bits/mathcalls.h:145:1: note: ‘log2’ MATHCALL (log2,, (Mdouble x)); ^ make[2]: [build/genrvv-type-indexer.o] Error 1 make[2]: Leaving directory `/home/autumn/cva6/util/gcc-toolchain-builder/build/gcc/gcc' make[1]: [all-gcc] Error 2 make[1]: Leaving directory `/home/autumn/cva6/util/gcc-toolchain-builder/build/gcc' make: [all] Error 2 Could not build GCC (even after removing target dirs), bailing out!

Environment: centos7

[JeanRochCoulon]

Hello, Reading your log, it seems the INSTALL_DIR is not setup. Before executing "sh build-toolchain.sh $INSTALL_DIR" can you "echo $INSTALL_DIR" ?

[cllll402]

Thank you so much for answering my question.

I have set the paths to $RISCV and $INSTALL_DIR in my bashrc. Aside from this problem, are there any other factors that might cause a build to fail?

[cllll402]

No error occurs after the INSTALL_DIR directory is specified as the cva6 peer directory and the centos gcc version 4.85 is upgraded to 9.3.1