From 6c7bcd7ccc24734c8e2d18029bc47fb1a24f5722 Mon Sep 17 00:00:00 2001
From: Jialiang Tan <jacob.jialiang.tan@gmail.com>
Date: Fri, 1 Nov 2024 16:43:02 -0700
Subject: [PATCH] Avoid hard coded icu4c path (#11410)

Summary: Pull Request resolved: https://github.com/facebookincubator/velox/pull/11410

Reviewed By: xiaoxmeng, kgpai

Differential Revision: D65354548

Pulled By: tanjialiang

fbshipit-source-id: bd6d4880198bee7162adf84b9e0ee8f8b1dd605d
---
 CMakeLists.txt | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 168eee277044..6a7744d94ae1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -387,7 +387,18 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
   if(ON_APPLE_M1)
-    list(APPEND CMAKE_PREFIX_PATH "/opt/homebrew/opt/icu4c")
+    execute_process(
+      COMMAND brew --prefix icu4c
+      RESULT_VARIABLE BREW_ICU4C
+      OUTPUT_VARIABLE BREW_ICU4C_PREFIX
+      OUTPUT_STRIP_TRAILING_WHITESPACE)
+    if(BREW_ICU4C EQUAL 0 AND EXISTS "${BREW_ICU4C_PREFIX}")
+      message(
+        STATUS "Found icu4c installed by Homebrew at ${BREW_ICU4C_PREFIX}")
+      list(APPEND CMAKE_PREFIX_PATH "${BREW_ICU4C_PREFIX}")
+    else()
+      list(APPEND CMAKE_PREFIX_PATH "/usr/local/opt/icu4c")
+    endif()
   else()
     list(APPEND CMAKE_PREFIX_PATH "/usr/local/opt/icu4c")
   endif()