From 35c707684befb2fe823ab1bfa002b34785c31841 Mon Sep 17 00:00:00 2001
From: Sergey Sharybin <sergey.vfx@gmail.com>
Date: Wed, 9 Oct 2019 17:14:00 +0200
Subject: CMake: Allow to use pre-compiled CentOS libraries

The goal is to make it able to use pre-compiled CentOS libraries on a
more modern system. Main issue was that it's possible that the compiler
on a newer version is defaulting to different C++11 ABI.

This change makes it so that if there is NO native libraries in the
lib folder and there IS pre-compiled CentOS folder, it will be used and
compiler will be forced to old ABI.

Differential Revision: https://developer.blender.org/D6031
---
 build_files/cmake/platform/platform_unix.cmake | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

(limited to 'build_files')

diff --git a/build_files/cmake/platform/platform_unix.cmake b/build_files/cmake/platform/platform_unix.cmake
index 1b3f9cf3fad..e655234eb34 100644
--- a/build_files/cmake/platform/platform_unix.cmake
+++ b/build_files/cmake/platform/platform_unix.cmake
@@ -22,14 +22,30 @@
 
 # Detect precompiled library directory
 if(NOT DEFINED LIBDIR)
+  # Path to a locally compiled libraries.
   set(LIBDIR_NAME ${CMAKE_SYSTEM_NAME}_${CMAKE_SYSTEM_PROCESSOR})
   string(TOLOWER ${LIBDIR_NAME} LIBDIR_NAME)
-  set(LIBDIR ${CMAKE_SOURCE_DIR}/../lib/${LIBDIR_NAME})
-else()
-  message(STATUS "Using pre-compiled LIBDIR: ${LIBDIR}")
+  set(LIBDIR_NATIVE_ABI ${CMAKE_SOURCE_DIR}/../lib/${LIBDIR_NAME})
+
+  # Path to precompiled libraries with known CentOS 7 ABI.
+  set(LIBDIR_CENTOS7_ABI ${CMAKE_SOURCE_DIR}/../lib/linux_centos7_x86_64)
+
+  # Choose the best suitable libraries.
+  if(EXISTS ${LIBDIR_NATIVE_ABI})
+    set(LIBDIR ${LIBDIR_NATIVE_ABI})
+  elseif(EXISTS ${LIBDIR_CENTOS7_ABI})
+    set(LIBDIR ${LIBDIR_CENTOS7_ABI})
+    set(WITH_CXX11_ABI OFF)
+  endif()
+
+  # Avoid namespace pollustion.
+  unset(LIBDIR_NATIVE_ABI)
+  unset(LIBDIR_CENTOS7_ABI)
 endif()
 
 if(EXISTS ${LIBDIR})
+  message(STATUS "Using pre-compiled LIBDIR: ${LIBDIR}")
+
   file(GLOB LIB_SUBDIRS ${LIBDIR}/*)
   # NOTE: Make sure "proper" compiled zlib comes first before the one
   # which is a part of OpenCollada. They have different ABI, and we
-- 
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