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dnl * Linux compatible mremap()
AC_DEFUN([DOVECOT_LINUX_MREMAP], [
AC_CACHE_CHECK([Linux compatible mremap()],i_cv_have_linux_mremap,[
AC_TRY_LINK([
#include <unistd.h>
#define __USE_GNU
#include <sys/mman.h>
], [
mremap(0, 0, 0, MREMAP_MAYMOVE);
], [
i_cv_have_linux_mremap=yes
], [
i_cv_have_linux_mremap=no
])
])
if test $i_cv_have_linux_mremap = yes; then
AC_DEFINE(HAVE_LINUX_MREMAP,, [Define if you have Linux-compatible mremap()])
fi
])
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