1 files changed, 140 insertions, 0 deletions
diff --git a/tests/t0047-dependencies.sh b/tests/t0047-dependencies.sh
new file mode 100755
index 0000000..87ecb63
--- /dev/null
+++ b/tests/t0047-dependencies.sh
@@ -0,0 +1,140 @@
+#!/bin/sh
+set -eu
+base="${TMPDIR-/tmp}/mcpu-cpp-deps-$$"
+mkdir -p "$base/user" "$base/sys" "$base/cfg-user" "$base/cfg-sys" "$base/after" "$base/cfg-after"
+trap 'rm -rf "$base"' EXIT HUP INT TERM
+
+cat > "$base/config.conf" <<EOT
+MCPU_CPP_INCLUDE_PATH = $base/cfg-user;
+MCPU_CPP_SYSTEM_INCLUDE_PATH = $base/cfg-sys;
+MCPU_CPP_AFTER_INCLUDE_PATH = $base/cfg-after;
+EOT
+
+cat > "$base/main.c" <<'EOT'
+#include "local.h"
+#include "local-alias.h"
+#include <user.h>
+#include <cfg-user.h>
+#include "sys-explicit.h"
+#include <sys-config.h>
+#include <after-explicit.h>
+#include <after-config.h>
+#include <same.h>
+#include <shared.h>
+SHOULD_NOT_APPEAR_IN_DEP_OUTPUT
+EOT
+
+cat > "$base/local.h" <<'EOT'
+#pragma once
+#line 100 "logical-local.h"
+LOCAL_BODY
+EOT
+ln "$base/local.h" "$base/local-alias.h"
+
+cat > "$base/user/user.h" <<'EOT'
+USER_HEADER
+EOT
+cat > "$base/cfg-user/cfg-user.h" <<'EOT'
+CONFIG_USER_HEADER
+EOT
+cat > "$base/user/shared.h" <<'EOT'
+SHARED_USER_HEADER
+EOT
+cat > "$base/user/transitive-only.h" <<'EOT'
+TRANSITIVE_USER_HEADER
+EOT
+
+cat > "$base/sys/sys-explicit.h" <<'EOT'
+#include <transitive-only.h>
+#include <shared.h>
+#include "sys-child.h"
+EOT
+cat > "$base/sys/sys-child.h" <<'EOT'
+SYSTEM_CHILD
+EOT
+cat > "$base/cfg-sys/sys-config.h" <<'EOT'
+SYSTEM_CONFIG
+EOT
+cat > "$base/after/after-explicit.h" <<'EOT'
+AFTER_EXPLICIT
+EOT
+cat > "$base/cfg-after/after-config.h" <<'EOT'
+AFTER_CONFIG
+EOT
+
+cat > "$base/user/same.h" <<'EOT'
+USER_WRAPPER
+#include_next <same.h>
+EOT
+cat > "$base/sys/same.h" <<'EOT'
+SYSTEM_WRAPPED
+EOT
+
+"$MCPU_CPP" --config-file "$base/config.conf" \
+  -I "$base/user" -isystem "$base/sys" -idirafter "$base/after" \
+  -M "$base/main.c" > "$base/M.out"
+
+# -M emits only a make rule and includes every physical dependency.
+grep "^main\\.o:" "$base/M.out" >/dev/null
+! grep 'SHOULD_NOT_APPEAR_IN_DEP_OUTPUT' "$base/M.out" >/dev/null
+for f in \
+  "$base/main.c" "$base/local.h" "$base/user/user.h" \
+  "$base/cfg-user/cfg-user.h" "$base/sys/sys-explicit.h" \
+  "$base/user/transitive-only.h" "$base/user/shared.h" \
+  "$base/sys/sys-child.h" "$base/cfg-sys/sys-config.h" \
+  "$base/after/after-explicit.h" "$base/cfg-after/after-config.h" \
+  "$base/user/same.h" "$base/sys/same.h"
+do
+  grep -F "$f" "$base/M.out" >/dev/null || {
+    echo "-M omitted dependency: $f" >&2
+    exit 1
+  }
+done
+
+# local-alias.h is a hard link to local.h and must not create a duplicate
+# physical dependency.  The logical #line name is not a dependency either.
+! grep -F "$base/local-alias.h" "$base/M.out" >/dev/null
+! grep -F 'logical-local.h' "$base/M.out" >/dev/null
+
+"$MCPU_CPP" --config-file "$base/config.conf" \
+  -I "$base/user" -isystem "$base/sys" -idirafter "$base/after" \
+  -MM "$base/main.c" > "$base/MM.out"
+
+grep "^main\\.o:" "$base/MM.out" >/dev/null
+for f in "$base/main.c" "$base/local.h" "$base/user/user.h" \
+         "$base/cfg-user/cfg-user.h" "$base/user/same.h" "$base/user/shared.h"
+do
+  grep -F "$f" "$base/MM.out" >/dev/null || {
+    echo "-MM omitted user dependency: $f" >&2
+    exit 1
+  }
+done
+
+# Quoting style does not define system-ness.  sys-explicit.h was included
+# with quotes but found in -isystem, and all descendants reachable only from
+# that system header are excluded.  -idirafter/config AFTER are system class.
+for f in "$base/sys/sys-explicit.h" "$base/user/transitive-only.h" \
+         "$base/sys/sys-child.h" "$base/cfg-sys/sys-config.h" \
+         "$base/after/after-explicit.h" "$base/cfg-after/after-config.h" \
+         "$base/sys/same.h"
+do
+  if grep -F "$f" "$base/MM.out" >/dev/null; then
+    echo "-MM kept system dependency: $f" >&2
+    exit 1
+  fi
+done
+
+# The same physical shared.h is first reached transitively from a system
+# header, then directly from main.  The direct user inclusion makes it a user
+# dependency, so -MM must retain it (checked above).
+
+# Normal mcpu-cpp output-file syntax remains usable for dependency output.
+"$MCPU_CPP" --config-file "$base/config.conf" -I "$base/user" \
+  -isystem "$base/sys" -idirafter "$base/after" \
+  -MM "$base/main.c" -o "$base/deps.mk"
+test -s "$base/deps.mk"
+grep '^main\.o:' "$base/deps.mk" >/dev/null
+
+# stdin follows GNU cpp's useful default target convention.
+printf 'int x;\n' | "$MCPU_CPP" --no-config -M > "$base/stdin.dep"
+grep '^-: -$' "$base/stdin.dep" >/dev/null