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Sync with diffutils.

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This commit is contained in:
Paul Eggert
2002-08-12 14:25:03 +00:00
parent c2143a71d6
commit d5629ce34a
7 changed files with 114 additions and 126 deletions
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14
m4/realloc.m4
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@@ -1,4 +1,4 @@
#serial 5
#serial 6
dnl From Jim Meyering.
dnl Determine whether realloc works when both arguments are 0.
@@ -12,7 +12,8 @@ AC_DEFUN([jm_FUNC_REALLOC],
AC_DEFINE(HAVE_DONE_WORKING_REALLOC_CHECK, 1,
[Define if the realloc check has been performed. ])
AC_CACHE_CHECK([for working realloc], jm_cv_func_working_realloc,
AC_CACHE_CHECK([whether realloc(0,0) returns a non-NULL pointer],
jm_cv_func_working_realloc,
[AC_TRY_RUN([
char *realloc ();
int
@@ -23,10 +24,15 @@ AC_DEFUN([jm_FUNC_REALLOC],
],
jm_cv_func_working_realloc=yes,
jm_cv_func_working_realloc=no,
dnl When crosscompiling, assume realloc is broken.
dnl When crosscompiling, assume realloc(0,0) returns NULL.
jm_cv_func_working_realloc=no)
])
if test $jm_cv_func_working_realloc = no; then
if test $jm_cv_func_working_realloc = yes; then
AC_DEFINE([HAVE_REALLOC], 1,
[Define to 1 if your system has a working `realloc' function,
and to 0 otherwise.])
else
AC_DEFINE([HAVE_REALLOC], 0)
AC_LIBOBJ(realloc)
AC_DEFINE(realloc, rpl_realloc,
[Define to rpl_realloc if the replacement function should be used.])