Build fails on Ubuntu 20

[Jitter00]

$ make 
I llama.cpp build info: 
I UNAME_S:  Linux
I UNAME_P:  x86_64
I UNAME_M:  x86_64
I CFLAGS:   -I.              -O3 -DNDEBUG -std=c11   -fPIC -pthread -mavx -mavx2 -mfma -mf16c -msse3
I CXXFLAGS: -I. -I./examples -O3 -DNDEBUG -std=c++11 -fPIC -pthread
I LDFLAGS:  
I CC:       cc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0
I CXX:      g++ (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0

cc  -I.              -O3 -DNDEBUG -std=c11   -fPIC -pthread -mavx -mavx2 -mfma -mf16c -msse3   -c ggml.c -o ggml.o
g++ -I. -I./examples -O3 -DNDEBUG -std=c++11 -fPIC -pthread -c utils.cpp -o utils.o
g++ -I. -I./examples -O3 -DNDEBUG -std=c++11 -fPIC -pthread main.cpp ggml.o utils.o -o main 
main.cpp: In function ‘int main(int, char**)’:
main.cpp:1006:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
 1006 |                         scanf("%*c");
      |                         ~~~~~^~~~~~~
./main -h

[gjmulder]

Try g++10? It works for me on 22.04:

$ make
I llama.cpp build info: 
I UNAME_S:  Linux
I UNAME_P:  x86_64
I UNAME_M:  x86_64
I CFLAGS:   -I.              -O3 -DNDEBUG -std=c11   -fPIC -pthread -mavx -mavx2 -mfma -mf16c -msse3
I CXXFLAGS: -I. -I./examples -O3 -DNDEBUG -std=c++11 -fPIC -pthread
I LDFLAGS:  
I CC:       cc (Ubuntu 10.4.0-4ubuntu1~22.04) 10.4.0
I CXX:      g++ (Ubuntu 10.4.0-4ubuntu1~22.04) 10.4.0

cc  -I.              -O3 -DNDEBUG -std=c11   -fPIC -pthread -mavx -mavx2 -mfma -mf16c -msse3   -c ggml.c -o ggml.o
g++ -I. -I./examples -O3 -DNDEBUG -std=c++11 -fPIC -pthread -c utils.cpp -o utils.o
g++ -I. -I./examples -O3 -DNDEBUG -std=c++11 -fPIC -pthread main.cpp ggml.o utils.o -o main 
main.cpp: In function ‘int main(int, char**)’:
main.cpp:1006:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
 1006 |                         scanf("%*c");
      |                         ~~~~~^~~~~~~
./main -h
usage: ./main [options]

options:
  -h, --help            show this help message and exit
  -i, --interactive     run in interactive mode
  --interactive-start   run in interactive mode and poll user input at startup
  -r PROMPT, --reverse-prompt PROMPT
                        in interactive mode, poll user input upon seeing PROMPT
  --color               colorise output to distinguish prompt and user input from generations
  -s SEED, --seed SEED  RNG seed (default: -1)
  -t N, --threads N     number of threads to use during computation (default: 4)
  -p PROMPT, --prompt PROMPT
                        prompt to start generation with (default: random)
  -f FNAME, --file FNAME
                        prompt file to start generation.
  -n N, --n_predict N   number of tokens to predict (default: 128)
  --top_k N             top-k sampling (default: 40)
  --top_p N             top-p sampling (default: 0.9)
  --repeat_last_n N     last n tokens to consider for penalize (default: 64)
  --repeat_penalty N    penalize repeat sequence of tokens (default: 1.3)
  --temp N              temperature (default: 0.8)
  -b N, --batch_size N  batch size for prompt processing (default: 8)
  -m FNAME, --model FNAME
                        model path (default: models/llama-7B/ggml-model.bin)

g++ -I. -I./examples -O3 -DNDEBUG -std=c++11 -fPIC -pthread quantize.cpp ggml.o utils.o -o quantize 

[Jitter00]

I'll try g++10, thanks