must_place.ld.h

// Copyright 2024 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
#pragma once
 
 
// clang-format off
#define ___PW_MUST_PLACE(isection, start_sym, end_sym)  \
    start_sym = .;                                              \
    isection                                                    \
    end_sym = .;                                                \
    ASSERT(start_sym != end_sym,                                \
           "Error: No symbols found in pattern below");         \
    ASSERT(start_sym != end_sym, #isection)
 
#define __PW_MUST_PLACE(isection, sym_prefix, unique)   \
    ___PW_MUST_PLACE(isection, sym_prefix ## start_ ## unique, sym_prefix ## end_ ## unique)
 
#define _PW_MUST_PLACE(isection, sym_prefix, unique)    \
    __PW_MUST_PLACE(isection, sym_prefix, unique)
 
#define PW_MUST_PLACE(isection)  \
    _PW_MUST_PLACE(isection, __section_place_, __LINE__)