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31 lines
968 B
Plaintext
31 lines
968 B
Plaintext
#serial 1
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# Arrange to define HAVE_MMAP_STACK and to compile mmap-stack.c
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# if there is sufficient support.
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# From Jim Meyering
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AC_DEFUN([AC_SYS_MMAP_STACK],
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[
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# prerequisites
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AC_REQUIRE([AC_FUNC_MMAP])
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AC_CHECK_HEADERS_ONCE(sys/mman.h ucontext.h stdarg.h)
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AC_CHECK_FUNCS_ONCE(getcontext makecontext setcontext)
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# For now, require tmpfile. FIXME: if there's a system with working mmap
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# and *context functions yet that lacks tmpfile, we can provide a replacement.
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AC_CHECK_FUNCS_ONCE(tmpfile)
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ac_i=$ac_cv_func_tmpfile
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ac_i=$ac_i:$ac_cv_func_getcontext
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ac_i=$ac_i:$ac_cv_func_makecontext
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ac_i=$ac_i:$ac_cv_func_setcontext
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ac_i=$ac_i:$ac_cv_func_mmap_fixed_mapped
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if test $ac_i = yes:yes:yes:yes:yes; then
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AC_LIBOBJ(mmap-stack)
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AC_DEFINE(HAVE_MMAP_STACK, 1,
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[Define to 1 if there is sufficient support (mmap, getcontext,
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makecontext, setcontext) for running a process with mmap'd
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memory for its stack.])
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fi
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])
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