Failed to make nginx master on Ubuntu 20.04.

[Hongyi Zhao]

On Ubuntu 20.04, I try to make git master version of nginx, but failed
with the following errors:

$ git log -1
commit f02e2a734ef472f0dcf83ab2e8ce96d1acead8a5 (HEAD -> master,
origin/master, origin/branches/default, origin/HEAD)
Author: Ruslan Ermilov <ru at nginx.com>
Date:   Thu Apr 22 16:12:52 2021 +0300

    Restored zeroing of ngx_channel_t in ngx_pass_open_channel().

    Due to structure's alignment, some uninitialized memory contents may have
    been passed between processes.

    Zeroing was removed in 0215ec9aaa8a.

    Reported by Johnny Wang.
$ ./auto/configure $(./auto/configure --help | egrep -o -- '--with[^=
]+ ' | xargs)
$ make
make -f objs/Makefile
make[1]: Entering directory
'/home/werner/Public/repo/github.com/nginx/nginx.git'
cc -c -pipe  -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror
-g   -I src/core -I src/event -I src/event/modules -I src/os/unix -I
objs -I src/mail -I src/stream \
    -o objs/src/misc/ngx_cpp_test_module.o \
    src/misc/ngx_cpp_test_module.cpp
src/misc/ngx_cpp_test_module.cpp:11:12: fatal error: ngx_http.h: No
such file or directory
   11 |   #include <ngx_http.h>
      |            ^~~~~~~~~~~~
compilation terminated.
make[1]: *** [objs/Makefile:1060: objs/src/misc/ngx_cpp_test_module.o] Error 1
make[1]: Leaving directory '/home/werner/Public/repo/github.com/nginx/nginx.git'
make: *** [Makefile:10: build] Error 2


Any hints for solving this problem will be highly appreciated.

Regards
-- 
Assoc. Prof. Hongyi Zhao <hongyi.zhao at gmail.com>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
NO. 552 North Gangtie Road, Xingtai, China