From 9047ec0b72a54ad0df59b5e232be2acbf5796511 Mon Sep 17 00:00:00 2001
From: vsr <vsr@opencascade.com>
Date: Thu, 12 Nov 2020 12:09:08 +0300
Subject: [PATCH] Replace IN_LIST operator to avoid error when working with
 older versions of CMake

---
 cmake/SalomeMacros.cmake        |  1 -
 cmake/SalomeSetupPlatform.cmake | 11 ++++++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/cmake/SalomeMacros.cmake b/cmake/SalomeMacros.cmake
index d24b042..33078a9 100644
--- a/cmake/SalomeMacros.cmake
+++ b/cmake/SalomeMacros.cmake
@@ -27,7 +27,6 @@ IF(WIN32)
   CMAKE_POLICY(SET CMP0020 OLD) # Disable automatic linking to qtmain.lib
 ENDIF(WIN32)
 CMAKE_POLICY(SET CMP0053 NEW)   # For correct Qt 5 detection procedure
-CMAKE_POLICY(SET CMP0057 NEW)   # For IF(IN_LIST) operator
 IF(CMAKE_VERSION VERSION_GREATER_EQUAL 3.12)
   CMAKE_POLICY(SET CMP0074 NEW) # Use ROOT variables when detecting packages
 ENDIF()
diff --git a/cmake/SalomeSetupPlatform.cmake b/cmake/SalomeSetupPlatform.cmake
index 55ffc5d..87cfdf1 100644
--- a/cmake/SalomeSetupPlatform.cmake
+++ b/cmake/SalomeSetupPlatform.cmake
@@ -111,10 +111,19 @@ ENDIF()
 #       specifying -DCMAKE_CXX_EXTENSIONS=OFF
 SET(SALOME_CXX_STANDARD 11 CACHE STRING "C++ standard to use")
 SET(_supported_standards 11 14 17 20)
-IF(NOT ${SALOME_CXX_STANDARD} IN_LIST _supported_standards)
+SET(_standard_ok FALSE)
+FOREACH(_standard ${_supported_standards})
+  IF(SALOME_CXX_STANDARD STREQUAL _standard)
+    SET(_standard_ok TRUE)
+    BREAK()
+  ENDIF()
+ENDFOREACH()
+IF(NOT _standard_ok)
   MESSAGE(FATAL_ERROR "Unsupported C++ standard: ${SALOME_CXX_STANDARD}; allowed values: ${_supported_standards}")
 ENDIF()
 UNSET(_supported_standards)
+UNSET(_standard)
+UNSET(_standard_ok)
 MESSAGE(STATUS "Setting C++ standard to ${SALOME_CXX_STANDARD}")
 SET(CMAKE_CXX_STANDARD ${SALOME_CXX_STANDARD})
 SET(CMAKE_CXX_STANDARD_REQUIRED ON)
-- 
2.39.2