pip install failing for version 2.0.0 python 3.10

[willv]

pip 22.0.4
python 3.10.1
hiredis 2.0.0
When doing a pip install hiredis i get this error:

gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -Ivendor -I/home/[..]/env/include -I/home/[..]/python/include/python3.10 -c vendor/hiredis/read.c -o build/temp.linux-x86_64-3.10/vendor/hiredis/read.o
      vendor/hiredis/read.c: In function ‘redisReaderFree’:
      vendor/hiredis/read.c:646:9: error: ‘for’ loop initial declarations are only allowed in C99 mode
               for (int i = 0; i < r->tasks; i++) {
               ^
      vendor/hiredis/read.c:646:9: note: use option -std=c99 or -std=gnu99 to compile your code
      error: command '/usr/bin/gcc' failed with exit code 1

[willv]

System used gcc 4.8.5 to produce the error, upgraded gcc and all is well.
thanks

[wdhwg001]

And you could also use:

CFLAGS="$CFLAGS -std=c99" \
pip install hiredis

to workaround this.