Compilation of nginx fails due to struct 'crypt_data' has no member named 'current_salt'

Question

I am trying to compile nginx on Ubuntu machine with GCC. My Glibc version is 2.31.

m@feynman:~/Junk/nginx-1.9.9
$ /lib/x86_64-linux-gnu/libc.so.6 --version
GNU C Library (Ubuntu GLIBC 2.31-0ubuntu9.2) stable release version 2.31.

I have downloaded a bunch of different versions from https://nginx.org/download/ and tried with them and fails every time.

./configure --with-threads --with-http_ssl_module --with-cc-opt="-Wno-error"
make

./configure generates following file in objs/Makefile:

CC =    cc
CFLAGS =  -pipe  -O -W -Wall -Wpointer-arith -Wno-unused -Werror -g -Wno-error
CPP =   cc -E
LINK =  $(CC)

...

This gives me this error below.

cc -c -pipe  -O -W -Wall -Wpointer-arith -Wno-unused -Werror -g -Wno-error -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
    -o objs/src/os/unix/ngx_posix_init.o \
    src/os/unix/ngx_posix_init.c
cc -c -pipe  -O -W -Wall -Wpointer-arith -Wno-unused -Werror -g -Wno-error -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
    -o objs/src/os/unix/ngx_user.o \
    src/os/unix/ngx_user.c
src/os/unix/ngx_user.c: In function ‘ngx_libc_crypt’:
src/os/unix/ngx_user.c:36:7: error: ‘struct crypt_data’ has no member named ‘current_salt’
   36 |     cd.current_salt[0] = ~salt[0];
      |       ^
make[1]: *** [objs/Makefile:749: objs/src/os/unix/ngx_user.o] Error 1
make[1]: Leaving directory '/home/m/Junk/nginx-1.9.9'
make: *** [Makefile:8: build] Error 2

I tried installing SSL lib and others like that and thought it would help and nothing worked.

sudo apt install libpcre3-dev libssl-dev

Answer 1

In case anyone was looking for a solution to the problem itself:

The field current_salt is no longer the name of the field where the result is stored and needs to be updated.

Instead, the field name is output, as defined in /usr/include/crypt.h on such a system:

/* Memory area used by crypt_r.  */
struct crypt_data
{
  /* crypt_r writes the hashed password to this field of its 'data'
     argument.  crypt_rn and crypt_ra do the same, treating the
     untyped data area they are supplied with as this struct.  */
  char output[CRYPT_OUTPUT_SIZE];