/usr/include/apache2/ap_config.h is in apache2-dev 2.4.7-1ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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
*
* http://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.
*/
/**
* @file ap_config.h
* @brief Symbol export macros and hook functions
*/
#ifndef AP_CONFIG_H
#define AP_CONFIG_H
#include "ap_hooks.h"
/* Although this file doesn't declare any hooks, declare the exports group here */
/**
* @defgroup exports Apache exports
* @ingroup APACHE_CORE
*/
#ifdef DOXYGEN
/* define these just so doxygen documents them */
/**
* AP_DECLARE_STATIC is defined when including Apache's Core headers,
* to provide static linkage when the dynamic library may be unavailable.
*
* @see AP_DECLARE_EXPORT
*
* AP_DECLARE_STATIC and AP_DECLARE_EXPORT are left undefined when
* including Apache's Core headers, to import and link the symbols from the
* dynamic Apache Core library and assure appropriate indirection and calling
* conventions at compile time.
*/
# define AP_DECLARE_STATIC
/**
* AP_DECLARE_EXPORT is defined when building the Apache Core dynamic
* library, so that all public symbols are exported.
*
* @see AP_DECLARE_STATIC
*/
# define AP_DECLARE_EXPORT
#endif /* def DOXYGEN */
#if !defined(WIN32)
/**
* Apache Core dso functions are declared with AP_DECLARE(), so they may
* use the most appropriate calling convention. Hook functions and other
* Core functions with variable arguments must use AP_DECLARE_NONSTD().
* @code
* AP_DECLARE(rettype) ap_func(args)
* @endcode
*/
#define AP_DECLARE(type) type
/**
* Apache Core dso variable argument and hook functions are declared with
* AP_DECLARE_NONSTD(), as they must use the C language calling convention.
* @see AP_DECLARE
* @code
* AP_DECLARE_NONSTD(rettype) ap_func(args [...])
* @endcode
*/
#define AP_DECLARE_NONSTD(type) type
/**
* Apache Core dso variables are declared with AP_MODULE_DECLARE_DATA.
* This assures the appropriate indirection is invoked at compile time.
*
* @note AP_DECLARE_DATA extern type apr_variable; syntax is required for
* declarations within headers to properly import the variable.
* @code
* AP_DECLARE_DATA type apr_variable
* @endcode
*/
#define AP_DECLARE_DATA
#elif defined(AP_DECLARE_STATIC)
#define AP_DECLARE(type) type __stdcall
#define AP_DECLARE_NONSTD(type) type
#define AP_DECLARE_DATA
#elif defined(AP_DECLARE_EXPORT)
#define AP_DECLARE(type) __declspec(dllexport) type __stdcall
#define AP_DECLARE_NONSTD(type) __declspec(dllexport) type
#define AP_DECLARE_DATA __declspec(dllexport)
#else
#define AP_DECLARE(type) __declspec(dllimport) type __stdcall
#define AP_DECLARE_NONSTD(type) __declspec(dllimport) type
#define AP_DECLARE_DATA __declspec(dllimport)
#endif
#if !defined(WIN32) || defined(AP_MODULE_DECLARE_STATIC)
/**
* Declare a dso module's exported module structure as AP_MODULE_DECLARE_DATA.
*
* Unless AP_MODULE_DECLARE_STATIC is defined at compile time, symbols
* declared with AP_MODULE_DECLARE_DATA are always exported.
* @code
* module AP_MODULE_DECLARE_DATA mod_tag
* @endcode
*/
#if defined(WIN32)
#define AP_MODULE_DECLARE(type) type __stdcall
#else
#define AP_MODULE_DECLARE(type) type
#endif
#define AP_MODULE_DECLARE_NONSTD(type) type
#define AP_MODULE_DECLARE_DATA
#else
/**
* AP_MODULE_DECLARE_EXPORT is a no-op. Unless contradicted by the
* AP_MODULE_DECLARE_STATIC compile-time symbol, it is assumed and defined.
*
* The old SHARED_MODULE compile-time symbol is now the default behavior,
* so it is no longer referenced anywhere with Apache 2.0.
*/
#define AP_MODULE_DECLARE_EXPORT
#define AP_MODULE_DECLARE(type) __declspec(dllexport) type __stdcall
#define AP_MODULE_DECLARE_NONSTD(type) __declspec(dllexport) type
#define AP_MODULE_DECLARE_DATA __declspec(dllexport)
#endif
#include "os.h"
#if (!defined(WIN32) && !defined(NETWARE)) || defined(__MINGW32__)
#include "ap_config_auto.h"
#endif
#include "ap_config_layout.h"
/* Where the main/parent process's pid is logged */
#ifndef DEFAULT_PIDLOG
#define DEFAULT_PIDLOG DEFAULT_REL_RUNTIMEDIR "/httpd.pid"
#endif
#if defined(NETWARE)
#define AP_NONBLOCK_WHEN_MULTI_LISTEN 1
#endif
#if defined(AP_ENABLE_DTRACE) && HAVE_SYS_SDT_H
#include <sys/sdt.h>
#else
#undef _DTRACE_VERSION
#endif
#ifdef _DTRACE_VERSION
#include "apache_probes.h"
#else
#include "apache_noprobes.h"
#endif
/* If APR has OTHER_CHILD logic, use reliable piped logs. */
#if APR_HAS_OTHER_CHILD
#define AP_HAVE_RELIABLE_PIPED_LOGS TRUE
#endif
#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
#define AP_HAVE_C99
#endif
/* Presume that the compiler supports C99-style designated
* initializers if using GCC (but not G++), or for any other compiler
* which claims C99 support. */
#if (defined(__GNUC__) && !defined(__cplusplus)) || defined(AP_HAVE_C99)
#define AP_HAVE_DESIGNATED_INITIALIZER
#endif
#ifndef __has_attribute /* check for supported attributes on clang */
#define __has_attribute(x) 0
#endif
#if (defined(__GNUC__) && __GNUC__ >= 4) || __has_attribute(sentinel)
#define AP_FN_ATTR_SENTINEL __attribute__((sentinel))
#else
#define AP_FN_ATTR_SENTINEL
#endif
#if ( defined(__GNUC__) && \
(__GNUC__ >= 4 || ( __GNUC__ == 3 && __GNUC_MINOR__ >= 4))) \
|| __has_attribute(warn_unused_result)
#define AP_FN_ATTR_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
#else
#define AP_FN_ATTR_WARN_UNUSED_RESULT
#endif
#if ( defined(__GNUC__) && \
(__GNUC__ >= 4 && __GNUC_MINOR__ >= 3)) \
|| __has_attribute(alloc_size)
#define AP_FN_ATTR_ALLOC_SIZE(x) __attribute__((alloc_size(x)))
#define AP_FN_ATTR_ALLOC_SIZE2(x,y) __attribute__((alloc_size(x,y)))
#else
#define AP_FN_ATTR_ALLOC_SIZE(x)
#define AP_FN_ATTR_ALLOC_SIZE2(x,y)
#endif
#endif /* AP_CONFIG_H */
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