From 77d1e74d29d4ee309b1c08eaea40ad789f08d125 Mon Sep 17 00:00:00 2001
From: Dominic Hamon <dominichamon@users.noreply.github.com>
Date: Wed, 10 Aug 2022 12:42:27 -0700
Subject: [PATCH] add debug option for enabling more output for failed
 cxxfeaturechecks (#1467)

fixes #1466
---
 cmake/CXXFeatureCheck.cmake | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/cmake/CXXFeatureCheck.cmake b/cmake/CXXFeatureCheck.cmake
index a96a014f..50e5f680 100644
--- a/cmake/CXXFeatureCheck.cmake
+++ b/cmake/CXXFeatureCheck.cmake
@@ -17,6 +17,8 @@ if(__cxx_feature_check)
 endif()
 set(__cxx_feature_check INCLUDED)
 
+option(CXXFEATURECHECK_DEBUG OFF)
+
 function(cxx_feature_check FILE)
   string(TOLOWER ${FILE} FILE)
   string(TOUPPER ${FILE} VAR)
@@ -64,7 +66,11 @@ function(cxx_feature_check FILE)
     add_definitions(-DHAVE_${VAR})
   else()
     if(NOT COMPILE_${FEATURE})
-      message(STATUS "Performing Test ${FEATURE} -- failed to compile: ${COMPILE_OUTPUT_VAR}")
+      if(CXXFEATURECHECK_DEBUG)
+        message(STATUS "Performing Test ${FEATURE} -- failed to compile: ${COMPILE_OUTPUT_VAR}")
+      else()
+        message(STATUS "Performing Test ${FEATURE} -- failed to compile")
+      endif()
     else()
       message(STATUS "Performing Test ${FEATURE} -- compiled but failed to run")
     endif()