Build fails with --enable-pystats and --with-tail-call-interp due to undeclared lastopcode variable

[furkanonder]

Bug report

Bug description:

When attempting to build CPython with both the --enable-pystats and --with-tail-call-interp options,
the build fails with errors about an undeclared identifier lastopcode.

Configuration

./configure CC=clang LD=clang --with-tail-call-interp --enable-pystats 

Build Output

In file included from Python/ceval.c:976:
Python/generated_cases.c.h:28:13: error: use of undeclared identifier 'lastopcode'
   28 |             INSTRUCTION_STATS(BINARY_OP);
      |             ^
Python/ceval_macros.h:66:48: note: expanded from macro 'INSTRUCTION_STATS'
   66 |         if (_Py_stats) _Py_stats->opcode_stats[lastopcode].pair_count[op]++; \
      |                                                ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:28:13: error: use of undeclared identifier 'lastopcode'
Python/ceval_macros.h:67:9: note: expanded from macro 'INSTRUCTION_STATS'
   67 |         lastopcode = op; \
      |         ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:93:13: error: use of undeclared identifier 'lastopcode'
   93 |             INSTRUCTION_STATS(BINARY_OP_ADD_FLOAT);
      |             ^
Python/ceval_macros.h:66:48: note: expanded from macro 'INSTRUCTION_STATS'
   66 |         if (_Py_stats) _Py_stats->opcode_stats[lastopcode].pair_count[op]++; \
      |                                                ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:93:13: error: use of undeclared identifier 'lastopcode'
Python/ceval_macros.h:67:9: note: expanded from macro 'INSTRUCTION_STATS'
   67 |         lastopcode = op; \
      |         ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:151:13: error: use of undeclared identifier 'lastopcode'
  151 |             INSTRUCTION_STATS(BINARY_OP_ADD_INT);
      |             ^
Python/ceval_macros.h:66:48: note: expanded from macro 'INSTRUCTION_STATS'
   66 |         if (_Py_stats) _Py_stats->opcode_stats[lastopcode].pair_count[op]++; \
      |                                                ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:151:13: error: use of undeclared identifier 'lastopcode'
Python/ceval_macros.h:67:9: note: expanded from macro 'INSTRUCTION_STATS'
   67 |         lastopcode = op; \
      |         ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:211:13: error: use of undeclared identifier 'lastopcode'
  211 |             INSTRUCTION_STATS(BINARY_OP_ADD_UNICODE);
      |             ^
Python/ceval_macros.h:66:48: note: expanded from macro 'INSTRUCTION_STATS'
   66 |         if (_Py_stats) _Py_stats->opcode_stats[lastopcode].pair_count[op]++; \
      |                                                ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:211:13: error: use of undeclared identifier 'lastopcode'
Python/ceval_macros.h:67:9: note: expanded from macro 'INSTRUCTION_STATS'
   67 |         lastopcode = op; \
      |         ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:271:13: error: use of undeclared identifier 'lastopcode'
  271 |             INSTRUCTION_STATS(BINARY_OP_EXTEND);
      |             ^
Python/ceval_macros.h:66:48: note: expanded from macro 'INSTRUCTION_STATS'
   66 |         if (_Py_stats) _Py_stats->opcode_stats[lastopcode].pair_count[op]++; \
      |                                                ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:271:13: error: use of undeclared identifier 'lastopcode'
Python/ceval_macros.h:67:9: note: expanded from macro 'INSTRUCTION_STATS'
   67 |         lastopcode = op; \
      |         ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:335:13: error: use of undeclared identifier 'lastopcode'
  335 |             INSTRUCTION_STATS(BINARY_OP_INPLACE_ADD_UNICODE);
      |             ^
Python/ceval_macros.h:66:48: note: expanded from macro 'INSTRUCTION_STATS'
   66 |         if (_Py_stats) _Py_stats->opcode_stats[lastopcode].pair_count[op]++; \
      |                                                ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:335:13: error: use of undeclared identifier 'lastopcode'
Python/ceval_macros.h:67:9: note: expanded from macro 'INSTRUCTION_STATS'
   67 |         lastopcode = op; \
      |         ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:418:13: error: use of undeclared identifier 'lastopcode'
  418 |             INSTRUCTION_STATS(BINARY_OP_MULTIPLY_FLOAT);
      |             ^
Python/ceval_macros.h:66:48: note: expanded from macro 'INSTRUCTION_STATS'
   66 |         if (_Py_stats) _Py_stats->opcode_stats[lastopcode].pair_count[op]++; \
      |                                                ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:418:13: error: use of undeclared identifier 'lastopcode'
Python/ceval_macros.h:67:9: note: expanded from macro 'INSTRUCTION_STATS'
   67 |         lastopcode = op; \
      |         ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:476:13: error: use of undeclared identifier 'lastopcode'
  476 |             INSTRUCTION_STATS(BINARY_OP_MULTIPLY_INT);
      |             ^
Python/ceval_macros.h:66:48: note: expanded from macro 'INSTRUCTION_STATS'
   66 |         if (_Py_stats) _Py_stats->opcode_stats[lastopcode].pair_count[op]++; \
      |                                                ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:476:13: error: use of undeclared identifier 'lastopcode'
Python/ceval_macros.h:67:9: note: expanded from macro 'INSTRUCTION_STATS'
   67 |         lastopcode = op; \
      |         ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:536:13: error: use of undeclared identifier 'lastopcode'
  536 |             INSTRUCTION_STATS(BINARY_OP_SUBSCR_DICT);
      |             ^
Python/ceval_macros.h:66:48: note: expanded from macro 'INSTRUCTION_STATS'
   66 |         if (_Py_stats) _Py_stats->opcode_stats[lastopcode].pair_count[op]++; \
      |                                                ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:536:13: error: use of undeclared identifier 'lastopcode'
Python/ceval_macros.h:67:9: note: expanded from macro 'INSTRUCTION_STATS'
   67 |         lastopcode = op; \
      |         ^
In file included from Python/ceval.c:976:
Python/generated_cases.c.h:602:13: error: use of undeclared identifier 'lastopcode'
  602 |             INSTRUCTION_STATS(BINARY_OP_SUBSCR_GETITEM);
      |             ^
Python/ceval_macros.h:66:48: note: expanded from macro 'INSTRUCTION_STATS'
   66 |         if (_Py_stats) _Py_stats->opcode_stats[lastopcode].pair_count[op]++; \
      |                                                ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
clang -c -fno-strict-overflow -Wsign-compare -Wunreachable-code -DNDEBUG -g -O3 -Wall    -std=c11 -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration -fvisibility=hidden  -I./Include/internal -I./Include/internal/mimalloc  -I. -I./Include    -DPy_BUILD_CORE -o Python/context.o Python/context.c
20 errors generated.
make: *** [Makefile:3221: Python/ceval.o] Error 1
make: *** Waiting for unfinished jobs....

Environment

• OS: Arch Linux (Linux 6.14.2-arch1-1)
• Compiler: clang version 19.1.7

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

• gh-132758: Fix tail call and pystats builds #132759

[Fidget-Spinner]

Thanks! I put a PR up to fix this.