ratelim.h:55:27: error: initializer element is not constant

Summary

Steps to reproduce:

1. Clone latest master (0.4.7.0-alpha-dev as of 10/06/2021)
2. ./autogen.sh
3. ./configure
4. make

What is the current bug behavior?

  CC       src/feature/dircache/dircache.o
  CC       src/feature/dircache/dirserv.o
  CC       src/feature/dirclient/dirclient.o
In file included from ./src/core/or/or.h:50:0,
                 from src/feature/dirclient/dirclient.c:13:
src/feature/dirclient/dirclient.c: In function ‘dir_client_decompress_response_body’:
./src/lib/log/ratelim.h:55:27: error: initializer element is not constant
 #define RATELIM_INIT(r) { (r), 0, 0, 0 }
                           ^
src/feature/dirclient/dirclient.c:1911:38: note: in expansion of macro ‘RATELIM_INIT’
     static ratelim_t warning_limit = RATELIM_INIT(LOG_INTERVAL);
                                      ^~~~~~~~~~~~
./src/lib/log/ratelim.h:55:27: note: (near initialization for ‘warning_limit.rate’)
 #define RATELIM_INIT(r) { (r), 0, 0, 0 }
                           ^
src/feature/dirclient/dirclient.c:1911:38: note: in expansion of macro ‘RATELIM_INIT’
     static ratelim_t warning_limit = RATELIM_INIT(LOG_INTERVAL);
                                      ^~~~~~~~~~~~
make[1]: *** [Makefile:11154: src/feature/dirclient/dirclient.o] Error 1
make[1]: Leaving directory '/home/georg/new/tor'
make: *** [Makefile:6180: all] Error 2

What is the expected behavior?

Either the program should compile without any errors, or configure should inform about dependency issues.

Failed Environment

• openSUSE Leap 15.2
• Tor 0.4.7.0-alpha-dev via git clone
• GNU Autoconf 2.69
• GNU Make 4.2.1
• gcc (SUSE Linux) 7.5.0

Working environment

• openSUSE Tumbleweed
• Tor 0.4.7.0-alpha-dev via git clone
• autoconf (GNU Autoconf) 2.69
• GNU Make 4.3
• gcc (SUSE Linux) 10.3.0

Possible fixes

No solution or workaround found so far.

Suggestion

In case the compatibility with older (stable) distributions is not restorable, an exemption should be implemented in configure