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Diffstat (limited to 'gnulib/m4/free.m4')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/m4/free.m4 | 40 |
2 files changed, 40 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 4fc10daa05477586fea99b6b3ca02a87d1102fa diff --git a/gnulib/m4/free.m4 b/gnulib/m4/free.m4 new file mode 100644 index 00000000..8f7fee2d --- /dev/null +++ b/gnulib/m4/free.m4 @@ -0,0 +1,40 @@ +# Check whether free (NULL) is supposed to work. + +# Copyright (C) 2003, 2004, 2005, 2009, 2010 Free Software Foundation, Inc. +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# Written by Paul Eggert. + +# We can't test for free (NULL) even at runtime, since it might +# happen to "work" for our test program, but not in general. So, be +# conservative and use feature tests for relatively modern hosts, +# where free (NULL) is known to work. This costs a bit of +# performance on some older hosts, but we can fix that later if +# needed. + +AC_DEFUN([gl_FUNC_FREE], +[ + AC_CACHE_CHECK([whether free (NULL) is known to work], + [gl_cv_func_free], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [[@%:@include <unistd.h>]], + [[@%:@if _POSIX_VERSION < 199009L && \ + (defined unix || defined _unix || defined _unix_ \ + || defined __unix || defined __unix__) + @%:@error "'free (NULL)' is not known to work" + @%:@endif]])], + [gl_cv_func_free=yes], + [gl_cv_func_free=no])]) + + if test $gl_cv_func_free = no; then + AC_LIBOBJ([free]) + AC_DEFINE([free], [rpl_free], + [Define to rpl_free if the replacement function should be used.]) + fi +]) + +# Prerequisites of lib/free.c. +AC_DEFUN([gl_PREREQ_FREE], [:]) |