diff options
Diffstat (limited to 'm4/clock_time.m4')
| -rw-r--r-- | m4/clock_time.m4 | 41 |
1 files changed, 31 insertions, 10 deletions
diff --git a/m4/clock_time.m4 b/m4/clock_time.m4 index 0c6d182d106..c016575c8ea 100644 --- a/m4/clock_time.m4 +++ b/m4/clock_time.m4 @@ -1,32 +1,53 @@ -# clock_time.m4 serial 11 +# clock_time.m4 serial 14 dnl Copyright (C) 2002-2006, 2009-2024 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. # Check for clock_getres, clock_gettime and clock_settime, -# and set LIB_CLOCK_GETTIME. +# and set CLOCK_TIME_LIB. # For a program named, say foo, you should add a line like the following # in the corresponding Makefile.am file: -# foo_LDADD = $(LDADD) $(LIB_CLOCK_GETTIME) +# foo_LDADD = $(LDADD) $(CLOCK_TIME_LIB) AC_DEFUN([gl_CLOCK_TIME], [ + AC_REQUIRE([AC_CANONICAL_HOST]) + dnl Persuade glibc and Solaris <time.h> to declare these functions. AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) + # On mingw, these functions are defined in the libwinpthread library, + # which is better avoided. In fact, the clock_gettime function is buggy + # in 32-bit mingw, when -D__MINGW_USE_VC2005_COMPAT is used (which Gnulib's + # year2038 module does): It leaves the upper 32 bits of the tv_sec field + # of the result uninitialized. + # Solaris 2.5.1 needs -lposix4 to get the clock_gettime function. # Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4. # Save and restore LIBS so e.g., -lrt, isn't added to it. Otherwise, *all* # programs in the package would end up linked with that potentially-shared # library, inducing unnecessary run-time overhead. - LIB_CLOCK_GETTIME= + CLOCK_TIME_LIB= + AC_SUBST([CLOCK_TIME_LIB]) + case "$host_os" in + mingw* | windows*) + ac_cv_func_clock_getres=no + ac_cv_func_clock_gettime=no + ac_cv_func_clock_settime=no + ;; + *) + gl_saved_libs=$LIBS + AC_SEARCH_LIBS([clock_gettime], [rt posix4], + [test "$ac_cv_search_clock_gettime" = "none required" || + CLOCK_TIME_LIB=$ac_cv_search_clock_gettime]) + AC_CHECK_FUNCS([clock_getres clock_gettime clock_settime]) + LIBS=$gl_saved_libs + ;; + esac + + # For backward compatibility. + LIB_CLOCK_GETTIME="$CLOCK_TIME_LIB" AC_SUBST([LIB_CLOCK_GETTIME]) - gl_saved_libs=$LIBS - AC_SEARCH_LIBS([clock_gettime], [rt posix4], - [test "$ac_cv_search_clock_gettime" = "none required" || - LIB_CLOCK_GETTIME=$ac_cv_search_clock_gettime]) - AC_CHECK_FUNCS([clock_getres clock_gettime clock_settime]) - LIBS=$gl_saved_libs ]) |