Auto detection gcc version result:
* Toolchain: gcc (GNU Compiler Collection)
* C Compiler: Version 2.32 (at /usr/bin/gcc)
* C++ Compiler: Version 2.32 (at /usr/bin/g++)
The following warnings were produced. Repeated here for convenience:
WARNING: You are using gcc 2.32 which is older than 10.0. This is not a supported configuration.

configure command:
bash configure --with-jobs=128 --prefix=/home/yansendao/git/jdk/install-slowdebug --verbose --with-debug-level=slowdebug --enable-unlimited-crypto --with-vendor-name=yansendao --with-vendor-url=https://github.com/sendaoYan --with-vendor-bug-url=mailto:yansendao.ysd@alibaba-inc.com --with-vendor-vm-bug-url=mailto:yansendao.ysd@alibaba-inc.com --with-jvm-variants=server --with-boot-jdk=/home/yansendao/software/jdk/openjdk/jdk-binary --with-gtest=/home/yansendao/git/googletest-v1.14.x --with-jtreg=/home/yansendao/software/jdk/jtreg-7.4 --with-jmh=build/jmh/jars --with-version-pre='' --with-version-opt=7a1e832e --with-zlib=system --enable-ccache

gcc version:
> gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/10/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap --enable-languages=c,c++,fortran,lto --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared --enable-threads=posix --enable-checking=release --disable-multilib --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-gcc-major-version-only --with-linker-hash-style=gnu --enable-plugin --enable-initfini-array --with-isl --enable-gnu-indirect-function --enable-cet --with-tune=generic --with-arch_32=x86-64 --build=x86_64-redhat-linux
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.2.1 20200825 (Alibaba 10.2.1-3.8 2.32) (GCC)

> gcc --version
gcc (GCC) 10.2.1 20200825 (Alibaba 10.2.1-3.8 2.32)
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.