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POSIX standards requires strsignal() to return a pointer to a char, not a const pointer to a char. [1] On uClibc, and possibly other libc's, that do not HAVE_DECL_STRSIGNAL, libcompat.h declares const char *strsignal (int sig) which causes a type error. [1] man 3 strsignal https://bugzilla.gnome.org/show_bug.cgi?id=763567
176 lines
4.5 KiB
C
176 lines
4.5 KiB
C
#ifndef LIBCOMPAT_H
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#define LIBCOMPAT_H
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#if HAVE_CONFIG_H
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#include <config.h>
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#endif
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#if defined(__GNUC__) && defined(__GNUC_MINOR__)
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#define GCC_VERSION_AT_LEAST(major, minor) \
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((__GNUC__ > (major)) || \
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(__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
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#else
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#define GCC_VERSION_AT_LEAST(major, minor) 0
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#endif
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#if GCC_VERSION_AT_LEAST(2,95)
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#define CK_ATTRIBUTE_UNUSED __attribute__ ((unused))
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#else
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#define CK_ATTRIBUTE_UNUSED
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#endif /* GCC 2.95 */
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#if GCC_VERSION_AT_LEAST(2,5)
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#define CK_ATTRIBUTE_NORETURN __attribute__ ((noreturn))
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#else
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#define CK_ATTRIBUTE_NORETURN
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#endif /* GCC 2.5 */
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/*
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* Used for MSVC to create the export attribute
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* CK_DLL_EXP is defined during the compilation of the library
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* on the command line.
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*/
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#ifndef CK_DLL_EXP
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#define CK_DLL_EXP
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#endif
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#if _MSC_VER
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#include <WinSock2.h> /* struct timeval, API used in gettimeofday implementation */
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#include <io.h> /* read, write */
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#include <process.h> /* getpid */
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#endif /* _MSC_VER */
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/* defines size_t */
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#include <sys/types.h>
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/* provides assert */
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#include <assert.h>
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/* defines FILE */
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#include <stdio.h>
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/* defines exit() */
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#include <stdlib.h>
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/* provides localtime and struct tm */
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif /* !HAVE_SYS_TIME_H */
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#include <time.h>
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/* declares fork(), _POSIX_VERSION. according to Autoconf.info,
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unistd.h defines _POSIX_VERSION if the system is POSIX-compliant,
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so we will use this as a test for all things uniquely provided by
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POSIX like sigaction() and fork() */
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_SYS_WAIT_H
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#include <sys/wait.h>
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#endif
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/* declares pthread_create and friends */
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#ifdef HAVE_PTHREAD
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#include <pthread.h>
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#endif
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#ifdef HAVE_STDINT_H
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#include <stdint.h>
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#endif
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/* replacement functions for broken originals */
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#if !HAVE_DECL_ALARM
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CK_DLL_EXP unsigned int alarm (unsigned int seconds);
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#endif /* !HAVE_DECL_ALARM */
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#if !HAVE_GETPID && HAVE__GETPID
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#define getpid _getpid
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#endif /* !HAVE_GETPID && HAVE__GETPID */
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#if !HAVE_DECL_LOCALTIME_R
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#if !defined(localtime_r)
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CK_DLL_EXP struct tm *localtime_r (const time_t * clock, struct tm *result);
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#endif
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#endif /* !HAVE_DECL_LOCALTIME_R */
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#if !HAVE_DECL_STRDUP && !HAVE__STRDUP
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CK_DLL_EXP char *strdup (const char *str);
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#elif !HAVE_DECL_STRDUP && HAVE__STRDUP
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#define strdup _strdup
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#endif /* !HAVE_DECL_STRDUP && HAVE__STRDUP */
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#if !HAVE_DECL_STRSIGNAL
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CK_DLL_EXP char *strsignal (int sig);
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#endif /* !HAVE_DECL_STRSIGNAL */
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/*
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* On systems where clock_gettime() is not available, or
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* on systems where some clocks may not be supported, the
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* definition for CLOCK_MONOTONIC and CLOCK_REALTIME may not
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* be available. These should define which type of clock
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* clock_gettime() should use. We define it here if it is
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* not defined simply so the reimplementation can ignore it.
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*
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* We set the values of these clocks to some (hopefully)
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* invalid value, to avoid the case where we define a
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* clock with a valid value, and unintentionally use
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* an actual good clock by accident.
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*/
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#ifndef CLOCK_MONOTONIC
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#define CLOCK_MONOTONIC -1
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#endif
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#ifndef CLOCK_REALTIME
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#define CLOCK_REALTIME -1
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#endif
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#ifndef HAVE_LIBRT
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#ifdef STRUCT_TIMESPEC_DEFINITION_MISSING
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/*
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* The following structure is defined in POSIX 1003.1 for times
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* specified in seconds and nanoseconds. If it is not defined in
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* time.g, then we need to define it here
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*/
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struct timespec
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{
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time_t tv_sec;
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long tv_nsec;
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};
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#endif /* STRUCT_TIMESPEC_DEFINITION_MISSING */
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#ifdef STRUCT_ITIMERSPEC_DEFINITION_MISSING
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/*
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* The following structure is defined in POSIX.1b for timer start values and intervals.
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* If it is not defined in time.h, then we need to define it here.
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*/
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struct itimerspec
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{
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struct timespec it_interval;
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struct timespec it_value;
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};
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#endif /* STRUCT_ITIMERSPEC_DEFINITION_MISSING */
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/*
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* Do a simple forward declaration in case the struct is not defined.
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* In the versions of timer_create in libcompat, sigevent is never
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* used.
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*/
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struct sigevent;
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#ifndef HAVE_CLOCK_GETTIME
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CK_DLL_EXP int clock_gettime (clockid_t clk_id, struct timespec *ts);
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#endif
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CK_DLL_EXP int timer_create (clockid_t clockid, struct sigevent *sevp,
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timer_t * timerid);
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CK_DLL_EXP int timer_settime (timer_t timerid, int flags,
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const struct itimerspec *new_value, struct itimerspec *old_value);
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CK_DLL_EXP int timer_delete (timer_t timerid);
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#endif /* HAVE_LIBRT */
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/* silence warnings about an empty library */
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CK_DLL_EXP void
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ck_do_nothing (void)
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CK_ATTRIBUTE_NORETURN;
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#endif /* !LIBCOMPAT_H */
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