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author | Paul Eggert <eggert@cs.ucla.edu> | 2005-02-21 08:05:49 +0000 |
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committer | Paul Eggert <eggert@cs.ucla.edu> | 2005-02-21 08:05:49 +0000 |
commit | 9df4b1d7e4dd38a5b0efd0614e04f18395663274 (patch) | |
tree | b851f96560385531eaa69dc569059f45a3203ffd /m4/gethrxtime.m4 | |
parent | 80cc962bd565f3f502adff2b33be342be6ef4bbb (diff) | |
download | coreutils-9df4b1d7e4dd38a5b0efd0614e04f18395663274.tar.xz |
Initial revision.
Diffstat (limited to 'm4/gethrxtime.m4')
-rw-r--r-- | m4/gethrxtime.m4 | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/m4/gethrxtime.m4 b/m4/gethrxtime.m4 new file mode 100644 index 000000000..89c6a21e7 --- /dev/null +++ b/m4/gethrxtime.m4 @@ -0,0 +1,57 @@ +# gethrxtime.m4 serial 1 +dnl Copyright (C) 2005 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. + +AC_DEFUN([gl_GETHRXTIME], +[ + AC_LIBSOURCES([gethrxtime.c, gethrxtime.h, xtime.h]) + AC_REQUIRE([gl_ARITHMETIC_HRTIME_T]) + AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) + AC_REQUIRE([gl_XTIME]) + AC_CHECK_DECLS([gethrtime], [], [], [#include <time.h>]) + case $ac_cv_have_decl_gethrtime,$gl_cv_arithmetic_hrtime_t in + yes,yes) ;; + *) + AC_LIBOBJ([gethrxtime]) + gl_PREREQ_GETHRXTIME;; + esac +]) + +# Test whether hrtime_t is an arithmetic type. +# It is not arithmetic in older Solaris c89 (which insists on +# not having a long long int type). +AC_DEFUN([gl_ARITHMETIC_HRTIME_T], +[ + AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) + AC_CACHE_CHECK([for arithmetic hrtime_t], gl_cv_arithmetic_hrtime_t, + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([#include <time.h>], + [hrtime_t x = 0; return x/x;])], + [gl_cv_arithmetic_hrtime_t=yes], + [gl_cv_arithmetic_hrtime_t=no])]) + if test $gl_cv_arithmetic_hrtime_t = yes; then + AC_DEFINE([HAVE_ARITHMETIC_HRTIME_T], 1, + [Define if you have an arithmetic hrtime_t type.]) + fi +]) + +# Prerequisites of lib/xtime.h. +AC_DEFUN([gl_XTIME], +[ + AC_REQUIRE([AC_C_INLINE]) + AC_REQUIRE([gl_AC_TYPE_LONG_LONG]) + : +]) + +# Prerequisites of lib/gethrxtime.c. +AC_DEFUN([gl_PREREQ_GETHRXTIME], +[ + dnl Do not AC_REQUIRE([gl_CLOCK_TIME]), since that would unnecessarily + dnl require -lrt on Solaris. Invocations of clock_gettime should be + dnl safe in gethrxtime.c since Solaris has native gethrtime. + AC_REQUIRE([AC_HEADER_TIME]) + AC_CHECK_FUNCS_ONCE(gettimeofday microuptime nanouptime) + : +]) |