35 lines
950 B
Plaintext
35 lines
950 B
Plaintext
#serial 5
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dnl From Jim Meyering.
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dnl Determine whether malloc accepts 0 as its argument.
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dnl If it doesn't, arrange to use the replacement function.
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dnl
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AC_DEFUN([jm_FUNC_MALLOC],
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[
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dnl xmalloc.c requires that this symbol be defined so it doesn't
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dnl mistakenly use a broken malloc -- as it might if this test were omitted.
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AC_DEFINE(HAVE_DONE_WORKING_MALLOC_CHECK, 1,
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[Define if the malloc check has been performed. ])
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AC_CACHE_CHECK([for working malloc], jm_cv_func_working_malloc,
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[AC_TRY_RUN([
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char *malloc ();
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int
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main ()
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{
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exit (malloc (0) ? 0 : 1);
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}
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],
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jm_cv_func_working_malloc=yes,
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jm_cv_func_working_malloc=no,
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dnl When crosscompiling, assume malloc is broken.
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jm_cv_func_working_malloc=no)
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])
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if test $jm_cv_func_working_malloc = no; then
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AC_LIBOBJ(malloc)
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AC_DEFINE(malloc, rpl_malloc,
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[Define to rpl_malloc if the replacement function should be used.])
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fi
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])
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