LFS 11.2 - chapter05/gcc-pass1 -> error when configure

albator9 · 01-19-2023, 05:04 PM

Hi all,
I'm new there.

I have an error when generating the Makefile (= "reconfigure phase") at chapter05/gcc-pass1.
Below the console output

Code:

checking for gcc option to accept ISO C99... none needed
checking for g++... no
checking for c++... no
checking for gpp... no
checking for aCC... no
checking for CC... no
checking for cxx... no
checking for cc++... no
checking for cl.exe... no
checking for FCC... no
checking for KCC... no
checking for RCC... no
checking for xlC_r... no
checking for xlC... no
checking whether we are using the GNU C++ compiler... no
checking whether g++ accepts -g... no
checking whether g++ accepts -static-libstdc++ -static-libgcc... no
checking for gnatbind... no
checking for gnatmake... no
checking whether compiler driver understands Ada... no
checking for gdc... no
checking whether the D compiler works... no
checking how to compare bootstrapped objects... cmp --ignore-initial=16 $$f1 $$f2
checking whether g++ supports C++11 features by default... no
checking whether g++ supports C++11 features with -std=gnu++11... no
checking whether g++ supports C++11 features with -std=gnu++0x... no
checking whether g++ supports C++11 features with -std=c++11... no
checking whether g++ supports C++11 features with +std=c++11... no
checking whether g++ supports C++11 features with -h std=c++11... no
checking whether g++ supports C++11 features with -std=c++0x... no
checking whether g++ supports C++11 features with +std=c++0x... no
checking whether g++ supports C++11 features with -h std=c++0x... no
configure: error: *** A compiler with support for C++11 language features is required.

Any idea ?

Albator

business_kid · 01-29-2023, 01:03 PM

Hello, albator9, & welcome to LQ.

I've done LFS in the past, and even HLFS when it was a thing. In chapter 5, you're using your host system to build static build tools, a sort of mini-os; Then you can chroot into your new system and build LFS itself in Chapter 6.

Please mention what your host OS is. Some systems (e.g. Red Hat, fedora, Centos, anything from the RH stable) are not suitable hosts. Your problem

Code:

configure: error: *** A compiler with support for C++11 language features is required.

means you don't have a C++ compiler installed. If your host system uses apt, there's usually a target

Code:

sudo apt update
sudo apt install build-essential

xlfs-0.2 · 01-29-2023, 06:57 PM

$ gcc --version

Any version gcc that supports c++11 setting should be fine. $ man gcc

You need something like CFLAGS="$CFLAGS std=gnu++11" if you don't have that. Gcc won't use c11 unless asked. It doesn't detect that.

albator9 · 02-01-2023, 09:24 AM

my gcc may not support c++11. So I have installed explicitly g++ package and now it's OK. Thanks a lot. Sorry for the dummy question.

hazel · 02-01-2023, 09:57 AM

Don't apologise. It was a perfectly reasonable question in the circumstances.

I hope that before starting your LFS build, you looked at the requirements page. There is a minimum version for all the tools on your host system, but for the essential tools like gcc, there is often a maximum version too. This can be a problem in bleeding edge hosts like Fedora. Using a later version than recommended might work but isn't advised for LFS newbies.

business_kid · 02-01-2023, 11:50 AM

Quote:

Originally Posted by albator9

my gcc may not support c++11. So I have installed explicitly g++ package and now it's OK. Thanks a lot. Sorry for the dummy question.

Good, so you can mark this solved and carry on.