Gappy build incompatible with cysignals==1.12.0

[wiwu2390]

A workaround is to use cysignals==1.11.4 instead, but maybe there's a nicer fix?
Error output below:

      In file included from gappy/core.c:797:
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h: In function ‘_sig_on_prejmp’:
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:117:5: error: ‘cysigs’ undeclared (first use in this function); did you mean ‘cysigs_t’?
        117 |     cysigs.s = message;
            |     ^~~~~~
            |     cysigs_t
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:117:5: note: each undeclared identifier is reported only once for each function it appears in
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h: In function ‘_sig_on_postjmp’:
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:149:9: error: implicit declaration of function ‘unlikely’ [-Wimplicit-function-declaration]
        149 |     if (unlikely(jmpret > 0))
            |         ^~~~~~~~
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:152:9: error: implicit declaration of function ‘_sig_on_recover’ [-Wimplicit-function-declaration]
        152 |         _sig_on_recover();
            |         ^~~~~~~~~~~~~~~
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:158:5: error: ‘cysigs’ undeclared (first use in this function); did you mean ‘cysigs_t’?
        158 |     cysigs.sig_on_count = 1;
            |     ^~~~~~
            |     cysigs_t
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:168:9: error: implicit declaration of function ‘_sig_on_interrupt_received’ [-Wimplicit-function-declaration]
        168 |         _sig_on_interrupt_received();
            |         ^~~~~~~~~~~~~~~~~~~~~~~~~~
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h: In function ‘_sig_off_’:
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:190:18: error: ‘cysigs’ undeclared (first use in this function); did you mean ‘cysigs_t’?
        190 |     if (unlikely(cysigs.sig_on_count <= 0))
            |                  ^~~~~~
            |                  cysigs_t
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:192:9: error: implicit declaration of function ‘_sig_off_warning’ [-Wimplicit-function-declaration]
        192 |         _sig_off_warning(file, line);
            |         ^~~~~~~~~~~~~~~~
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h: In function ‘sig_check’:
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:218:18: error: ‘cysigs’ undeclared (first use in this function); did you mean ‘cysigs_t’?
        218 |     if (unlikely(cysigs.interrupt_received) && cysigs.sig_on_count == 0)
            |                  ^~~~~~
            |                  cysigs_t
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h: In function ‘sig_block’:
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:252:7: error: ‘cysigs’ undeclared (first use in this function); did you mean ‘cysigs_t’?
        252 |     ++cysigs.block_sigint;
            |       ^~~~~~
            |       cysigs_t
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h: In function ‘sig_unblock’:
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:265:7: error: ‘cysigs’ undeclared (first use in this function); did you mean ‘cysigs_t’?
        265 |     --cysigs.block_sigint;
            |       ^~~~~~
            |       cysigs_t
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h: In function ‘sig_retry’:
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:281:18: error: ‘cysigs’ undeclared (first use in this function); did you mean ‘cysigs_t’?
        281 |     if (unlikely(cysigs.sig_on_count <= 0))
            |                  ^~~~~~
            |                  cysigs_t
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h: In function ‘sig_error’:
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:294:18: error: ‘cysigs’ undeclared (first use in this function); did you mean ‘cysigs_t’?
        294 |     if (unlikely(cysigs.sig_on_count <= 0))
            |                  ^~~~~~
            |                  cysigs_t
      gappy/core.c: At top level:
      gappy/core.c:2482:15: error: ‘_sig_on_interrupt_received’ redeclared as different kind of symbol
       2482 | static void (*_sig_on_interrupt_received)(void); /*proto*/
            |               ^~~~~~~~~~~~~~~~~~~~~~~~~~
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:168:9: note: previous implicit declaration of ‘_sig_on_interrupt_received’ with type ‘int()’
        168 |         _sig_on_interrupt_received();
            |         ^~~~~~~~~~~~~~~~~~~~~~~~~~
      gappy/core.c:2483:15: error: ‘_sig_on_recover’ redeclared as different kind of symbol
       2483 | static void (*_sig_on_recover)(void); /*proto*/
            |               ^~~~~~~~~~~~~~~
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:152:9: note: previous implicit declaration of ‘_sig_on_recover’ with type ‘int()’
        152 |         _sig_on_recover();
            |         ^~~~~~~~~~~~~~~
      gappy/core.c:2484:15: error: ‘_sig_off_warning’ redeclared as different kind of symbol
       2484 | static void (*_sig_off_warning)(char const *, int); /*proto*/
            |               ^~~~~~~~~~~~~~~~
      /tmp/pip-build-env-t5rwztp9/overlay/lib/python3.10/site-packages/cysignals/macros.h:192:9: note: previous implicit declaration of ‘_sig_off_warning’ with type ‘int()’
        192 |         _sig_off_warning(file, line);
            |         ^~~~~~~~~~~~~~~~
      gappy/core.c:2484:15: warning: ‘_sig_off_warning’ defined but not used [-Wunused-variable]
       2484 | static void (*_sig_off_warning)(char const *, int); /*proto*/
            |               ^~~~~~~~~~~~~~~~
      gappy/core.c:2483:15: warning: ‘_sig_on_recover’ defined but not used [-Wunused-variable]
       2483 | static void (*_sig_on_recover)(void); /*proto*/
            |               ^~~~~~~~~~~~~~~
      gappy/core.c:2482:15: warning: ‘_sig_on_interrupt_received’ defined but not used [-Wunused-variable]
       2482 | static void (*_sig_on_interrupt_received)(void); /*proto*/
            |               ^~~~~~~~~~~~~~~~~~~~~~~~~~
      error: command '/usr/bin/gcc' failed with exit code 1
      [end of output]