From ced0cd12d0dc8ec113e2139082b72e0ea964a567 Mon Sep 17 00:00:00 2001
From: Gregory Anders <8965202+gpanders@users.noreply.github.com>
Date: Thu, 16 Feb 2023 12:36:55 -0700
Subject: [PATCH] build: only use HOSTNAME_PRG if HOSTNAME is undefined
 (#22288)

Allow specifying the HOSTNAME variable by defining it with -D when
invoking CMake, instead of overriding it with the output of
HOSTNAME_RPG.
---
 cmake.config/CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmake.config/CMakeLists.txt b/cmake.config/CMakeLists.txt
index da7b2b9b45..9ae81074e7 100644
--- a/cmake.config/CMakeLists.txt
+++ b/cmake.config/CMakeLists.txt
@@ -188,7 +188,7 @@ elseif (NOT DEFINED USERNAME AND EXISTS ${WHOAMI_PRG})
 endif()
 if (DEFINED ENV{HOSTNAME})
   set(HOSTNAME $ENV{HOSTNAME})
-elseif (EXISTS ${HOSTNAME_PRG})
+elseif (NOT DEFINED HOSTNAME AND EXISTS ${HOSTNAME_PRG})
   execute_process(COMMAND ${HOSTNAME_PRG}
     OUTPUT_STRIP_TRAILING_WHITESPACE
     OUTPUT_VARIABLE HOSTNAME)