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diff --git a/test cases/common/257 generated header dep/meson.build b/test cases/common/257 generated header dep/meson.build
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+++ b/test cases/common/257 generated header dep/meson.build
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+project('generated header dep', 'c')
+
+# Regression test case for a very specific case:
+# - Uses both_libraries(), or library() with default_library=both.
+# - A header file is generated by a custom_target() and passed as source.
+# - A C file that uses that header is passed as a declare_dependency() source.
+# Under those specific conditions, the static library used to miss an order
+# dependency on the header file. This happened in GLib:
+# https://gitlab.gnome.org/GNOME/glib/-/merge_requests/2917.
+
+python = import('python').find_installation()
+header = custom_target(
+  output: 'foo.h',
+  capture: true,
+  command: [python, '-c', 'print("#define FOO")'],
+)
+
+sources_dep = declare_dependency(sources: files('foo.c'))
+
+both_libraries('foo', header,
+  dependencies: sources_dep,
+)