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Build: No longer require HAVE_DECL_CLOCK_MONOTONIC to always be set. 

Previously, if threading was enabled HAVE_DECL_CLOCK_MONOTONIC would always
be set to 0 or 1. However, this macro was needed in xz so if xz was not
built with threading and HAVE_DECL_CLOCK_MONOTONIC was not defined but
HAVE_CLOCK_GETTIME was, it caused a warning during build. Now,
HAVE_DECL_CLOCK_MONOTONIC has been renamed to HAVE_CLOCK_MONOTONIC and
will only be set if it is 1.
This commit is contained in:
Jia Tan 2022-12-29 01:10:53 +08:00
parent 7339e39dc0
commit 74dae7d300
4 changed files with 11 additions and 11 deletions
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8
CMakeLists.txt
View File

@ -154,13 +154,11 @@ if(NOT WIN32 AND NOT DEFINED HAVE_CLOCK_GETTIME)
endif()
if(HAVE_CLOCK_GETTIME)
# Check if CLOCK_MONOTONIC is available for clock_gettime().
check_symbol_exists(CLOCK_MONOTONIC time.h HAVE_DECL_CLOCK_MONOTONIC)
check_symbol_exists(CLOCK_MONOTONIC time.h HAVE_CLOCK_MONOTONIC)
# HAVE_DECL_CLOCK_MONOTONIC should always be defined to 0 or 1
# when clock_gettime is available.
add_compile_definitions(
HAVE_CLOCK_GETTIME
HAVE_DECL_CLOCK_MONOTONIC=$<BOOL:"${HAVE_DECL_CLOCK_MONOTONIC}">
HAVE_CLOCK_MONOTONIC
)
endif()
endif()
@ -184,7 +182,7 @@ else()
add_compile_definitions(MYTHREAD_POSIX)
# Check if pthread_condattr_setclock() exists to use CLOCK_MONOTONIC.
if(HAVE_DECL_CLOCK_MONOTONIC)
if(HAVE_CLOCK_MONOTONIC)
list(INSERT CMAKE_REQUIRED_LIBRARIES 0 "${CMAKE_THREAD_LIBS_INIT}")
check_symbol_exists(pthread_condattr_setclock pthread.h
HAVE_PTHREAD_CONDATTR_SETCLOCK)

5
configure.ac
View File

@ -638,7 +638,10 @@ case $enable_threads in
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
AC_SEARCH_LIBS([clock_gettime], [rt])
AC_CHECK_FUNCS([clock_gettime pthread_condattr_setclock])
AC_CHECK_DECLS([CLOCK_MONOTONIC], [], [], [[#include <time.h>]])
AC_CHECK_DECL([CLOCK_MONOTONIC], [AC_DEFINE(
[HAVE_CLOCK_MONOTONIC], [1], [Define to 1 if
CLOCK_MONOTONIC is declared in <time.h>])], [],
[[#include <time.h>]])
CFLAGS=$OLD_CFLAGS
;;
win95)

4
src/common/mythread.h
View File

@ -219,8 +219,8 @@ static inline int
mythread_cond_init(mythread_cond *mycond)
{
#ifdef HAVE_CLOCK_GETTIME
// NOTE: HAVE_DECL_CLOCK_MONOTONIC is always defined to 0 or 1.
# if defined(HAVE_PTHREAD_CONDATTR_SETCLOCK) && HAVE_DECL_CLOCK_MONOTONIC
# if defined(HAVE_PTHREAD_CONDATTR_SETCLOCK) && \
defined(HAVE_CLOCK_MONOTONIC)
struct timespec ts;
pthread_condattr_t condattr;

5
src/xz/mytime.c
View File

@ -12,7 +12,7 @@
#include "private.h"
#if !(defined(HAVE_CLOCK_GETTIME) && HAVE_DECL_CLOCK_MONOTONIC)
#if !(defined(HAVE_CLOCK_GETTIME) && defined(HAVE_CLOCK_MONOTONIC))
# include <sys/time.h>
#endif
@ -28,8 +28,7 @@ static uint64_t next_flush;
static uint64_t
mytime_now(void)
{
// NOTE: HAVE_DECL_CLOCK_MONOTONIC is always defined to 0 or 1.
#if defined(HAVE_CLOCK_GETTIME) && HAVE_DECL_CLOCK_MONOTONIC
#if defined(HAVE_CLOCK_GETTIME) && defined(HAVE_CLOCK_MONOTONIC)
// If CLOCK_MONOTONIC was available at compile time but for some
// reason isn't at runtime, fallback to CLOCK_REALTIME which
// according to POSIX is mandatory for all implementations.