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#serial 5 |
#serial 6 |
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dnl From Jim Meyering. |
dnl From Jim Meyering. |
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dnl Determine whether realloc works when both arguments are 0. |
dnl Determine whether realloc works when both arguments are 0. |
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AC_DEFINE(HAVE_DONE_WORKING_REALLOC_CHECK, 1, |
AC_DEFINE(HAVE_DONE_WORKING_REALLOC_CHECK, 1, |
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[Define if the realloc check has been performed. ]) |
[Define if the realloc check has been performed. ]) |
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AC_CACHE_CHECK([for working realloc], jm_cv_func_working_realloc, |
AC_CACHE_CHECK([whether realloc(0,0) returns a non-NULL pointer], |
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jm_cv_func_working_realloc, |
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[AC_TRY_RUN([ |
[AC_TRY_RUN([ |
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char *realloc (); |
char *realloc (); |
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int |
int |
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], |
], |
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jm_cv_func_working_realloc=yes, |
jm_cv_func_working_realloc=yes, |
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jm_cv_func_working_realloc=no, |
jm_cv_func_working_realloc=no, |
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dnl When crosscompiling, assume realloc is broken. |
dnl When crosscompiling, assume realloc(0,0) returns NULL. |
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jm_cv_func_working_realloc=no) |
jm_cv_func_working_realloc=no) |
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]) |
]) |
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if test $jm_cv_func_working_realloc = no; then |
if test $jm_cv_func_working_realloc = yes; then |
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AC_DEFINE([HAVE_REALLOC], 1, |
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[Define to 1 if your system has a working `realloc' function, |
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and to 0 otherwise.]) |
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else |
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AC_DEFINE([HAVE_REALLOC], 0) |
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AC_LIBOBJ(realloc) |
AC_LIBOBJ(realloc) |
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AC_DEFINE(realloc, rpl_realloc, |
AC_DEFINE(realloc, rpl_realloc, |
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[Define to rpl_realloc if the replacement function should be used.]) |
[Define to rpl_realloc if the replacement function should be used.]) |