1 files changed, 44 insertions, 0 deletions
diff --git a/tests/t0027-system-language-path.sh b/tests/t0027-system-language-path.sh
new file mode 100755
index 0000000..0947c07
--- /dev/null
+++ b/tests/t0027-system-language-path.sh
@@ -0,0 +1,44 @@
+#!/bin/sh
+set -eu
+base="${TMPDIR-/tmp}/mcpu-cpp-system-lang-$$"
+mkdir -p "$base/system/diff" "$base/system/as"
+trap 'rm -rf "$base"' EXIT HUP INT TERM
+
+cat > "$base/test.conf" <<EOT
+MCPU_CPP_SYSTEM_INCLUDE_PATH = $base/system;
+EOT
+
+cat > "$base/system/common.h" <<'EOT'
+common_system_header
+EOT
+cat > "$base/system/diff/lang.h" <<'EOT'
+diff_system_header
+EOT
+cat > "$base/system/as/lang.h" <<'EOT'
+as_system_header
+EOT
+cat > "$base/system/diff/explicit.h" <<'EOT'
+explicit_diff_system_header
+EOT
+
+cat > "$base/main.c" <<'EOT'
+#include <common.h>
+#lang "diff"
+#include <lang.h>
+#endlang
+#lang "as"
+#include <lang.h>
+#include <diff/explicit.h>
+#endlang
+EOT
+
+"$MCPU_CPP" --config-file "$base/test.conf" "$base/main.c" -o "$base/out"
+
+grep '^common_system_header$' "$base/out" >/dev/null
+grep '^diff_system_header$' "$base/out" >/dev/null
+grep '^as_system_header$' "$base/out" >/dev/null
+grep '^explicit_diff_system_header$' "$base/out" >/dev/null
+
+if "$MCPU_CPP" --config-file "$base/test.conf" -nostdinc "$base/main.c" -o "$base/no" 2>/dev/null; then
+  exit 1
+fi