Include unistd.h in passes/hierarchy/hierarchy.cc (required for access(3))
This fixes compilation errors on Arch Linux. Signed-off-by: Martin Schmölzer <martin.schmoelzer@student.tuwien.ac.at>
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@ -23,6 +23,7 @@
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#include <stdio.h>
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#include <fnmatch.h>
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#include <set>
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#include <unistd.h>
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namespace {
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struct generate_port_decl_t {
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