From b02259ea590223e4391b5351934956a4aed8bdbc Mon Sep 17 00:00:00 2001
From: Sutou Kouhei <kou@clear-code.com>
Date: Wed, 18 Dec 2024 14:38:09 +0900
Subject: [PATCH] GH-45053: [C++] Add support for Boost 1.87.0 (#45057)

### Rationale for this change

Boost 1.87.0 removed `BOOST_PROCESS_V2_ASIO_NAMESPACE`:
https://github.com/boostorg/process/commit/e827d145424ede0f912b10d4e2800e1da9a2867d

### What changes are included in this PR?

Use `BOOST_PROCESS_V2_NAMESPACE::net` instead.

### Are these changes tested?

Yes.

### Are there any user-facing changes?

No.
* GitHub Issue: #45053

Authored-by: Sutou Kouhei <kou@clear-code.com>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>
---
 cpp/src/arrow/testing/process.cc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/cpp/src/arrow/testing/process.cc b/cpp/src/arrow/testing/process.cc
index 133768ff015e6..57df0196c117f 100644
--- a/cpp/src/arrow/testing/process.cc
+++ b/cpp/src/arrow/testing/process.cc
@@ -85,9 +85,14 @@
 #  include <thread>
 
 #  ifdef BOOST_PROCESS_USE_V2
-namespace asio = BOOST_PROCESS_V2_ASIO_NAMESPACE;
 namespace process = BOOST_PROCESS_V2_NAMESPACE;
 namespace filesystem = process::filesystem;
+// For Boost < 1.87.0
+#    ifdef BOOST_PROCESS_V2_ASIO_NAMESPACE
+namespace asio = BOOST_PROCESS_V2_ASIO_NAMESPACE;
+#    else
+namespace asio = process::net;
+#    endif
 #  elif defined(BOOST_PROCESS_HAVE_V1)
 namespace process = boost::process::v1;
 namespace filesystem = boost::process::v1::filesystem;