X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fmemcmp.m4;h=1de340938bd8ab3aeeb54f5704241b56c45f2003;hb=2bf674b2395b6aff54eff7928d24f2995c37c28e;hp=91b3dd3152ad3c7c947a2d658e6b944e5f2a34a8;hpb=27ef3b8633ec7b4aba91535ec51c43f39b42a25a;p=gnulib.git diff --git a/m4/memcmp.m4 b/m4/memcmp.m4 index 91b3dd315..1de340938 100644 --- a/m4/memcmp.m4 +++ b/m4/memcmp.m4 @@ -1,48 +1,9 @@ -#serial 5 +#serial 7 -dnl A replacement for autoconf's AC_FUNC_MEMCMP that detects -dnl the losing memcmp on some x86 Next systems. -AC_DEFUN(jm_AC_FUNC_MEMCMP, -[AC_CACHE_CHECK([for working memcmp], jm_cv_func_memcmp_working, -[AC_TRY_RUN( -[int -main () -{ - /* Some versions of memcmp are not 8-bit clean. */ - char c0 = 0x40, c1 = 0x80, c2 = 0x81; - if (memcmp(&c0, &c2, 1) >= 0 || memcmp(&c1, &c2, 1) >= 0) - exit (1); - - /* The Next x86 OpenStep bug shows up only when comparing 16 bytes - or more and with at least one buffer not starting on a 4-byte boundary. - William Lewis provided this test program. */ - { - char foo[21]; - char bar[21]; - int i; - for (i = 0; i < 4; i++) - { - char *a = foo + i; - char *b = bar + i; - strcpy (a, "--------01111111"); - strcpy (b, "--------10000000"); - if (memcmp (a, b, 16) >= 0) - exit (1); - } - exit (0); - } -}], - jm_cv_func_memcmp_working=yes, - jm_cv_func_memcmp_working=no, - jm_cv_func_memcmp_working=no)]) -test $jm_cv_func_memcmp_working = no \ - && AC_LIBOBJ(memcmp) -]) - -AC_DEFUN(jm_FUNC_MEMCMP, -[AC_REQUIRE([jm_AC_FUNC_MEMCMP])dnl - if test $jm_cv_func_memcmp_working = no; then - AC_DEFINE_UNQUOTED(memcmp, rpl_memcmp, +AC_DEFUN([jm_FUNC_MEMCMP], +[AC_REQUIRE([AC_FUNC_MEMCMP])dnl + if test $ac_cv_func_memcmp_working = no; then + AC_DEFINE(memcmp, rpl_memcmp, [Define to rpl_memcmp if the replacement function should be used.]) fi ])