GH-46562: [GLib][CI] Enable ARROW_GLIB_WERROR by default

[hiroyuki-sato]

Rationale for this change

In GLib buiding, disabled -Werror compiler flag by default.

What changes are included in this PR?

Change -Werror by default. This change makes debugging easier.

Are these changes tested?

Yes.

Are there any user-facing changes?

No.

• GitHub Issue: [GLib][CI] Enable ARROW_GLIB_WERROR by default #46562

[github-actions]

⚠️ GitHub issue #46562 has been automatically assigned in GitHub to PR creator.

[hiroyuki-sato]

Oh, It seems that we need to fix many warnings before this flag change. Change to draft.

[hiroyuki-sato]

https://github.com/apache/arrow/actions/runs/15199666662/job/42751369386?pr=46563

--- stderr ---
arrow-glib/version.h:25: Error: Arrow: identifier not found on the first line:



^

arrow-glib/version.h:28: Warning: Arrow: "@section_id" parameter unexpected at this location:

 * @section_id: version-macros

 * @GARROW_S3_LOG_LEVEL_TRACE: Trace.

    ^

ccache: unknown option -- r


<unknown>:: Fatal: Arrow: warnings configured as fatal


<unknown>:: Fatal: Arrow: warnings configured as fatal







[69/123] Compiling C++ object gandiva-glib/libgandiva-glib-2100.dll.p/selection-vector.cpp.obj
[70/123] Compiling C++ object gandiva-glib/libgandiva-glib-2100.dll.p/projector.cpp.obj
[71/123] Compiling C++ object gandiva-glib/libgandiva-glib-2100.dll.p/node.cpp.obj
[72/123] Compiling C++ object parquet-glib/libparquet-glib-2100.dll.p/arrow-file-reader.cpp.obj
[73/123] Compiling C++ object parquet-glib/libparquet-glib-2100.dll.p/arrow-file-writer.cpp.obj
ninja: build stopped: subcommand failed.
Error: Process completed with exit code 1.

[hiroyuki-sato]

We need to modify newline string on the Windows Platform.
We may need to modify this part

arrow/c_glib/arrow-glib/meson.build

Lines 181 to 196 in 153da30

	version_h = configure_file(
	input: 'version.h.in',
	output: 'version.h',
	command: [
	python3,
	generate_version_header_py,
	'--library',
	'GARROW',
	'--version',
	version,
	'--input',
	'@INPUT@',
	'--output',
	'@OUTPUT@',
	],
	)