From 04011ff9198fadd3b483b4b81782b9467d821d53 Mon Sep 17 00:00:00 2001
From: Yixing Lao <yixing.lao@gmail.com>
Date: Sun, 17 Jan 2021 17:45:31 -0800
Subject: [PATCH] allow selection of legacy/new CXX11 ABI

---
 CMakeLists.txt              |  1 +
 src/lib_json/CMakeLists.txt | 14 ++++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f1db5e3..ac4c940 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -85,6 +85,7 @@ option(JSONCPP_WITH_STRICT_ISO "Issue all the warnings demanded by strict ISO C
 option(JSONCPP_WITH_PKGCONFIG_SUPPORT "Generate and install .pc files" ON)
 option(JSONCPP_WITH_CMAKE_PACKAGE "Generate and install cmake package files" ON)
 option(JSONCPP_WITH_EXAMPLE "Compile JsonCpp example" OFF)
+option(JSONCPP_USE_CXX11_ABI "Set -D_GLIBCXX_USE_CXX11_ABI=1." ON)
 option(BUILD_SHARED_LIBS "Build jsoncpp_lib as a shared library." ON)
 option(BUILD_STATIC_LIBS "Build jsoncpp_lib as a static library." ON)
 option(BUILD_OBJECT_LIBS "Build jsoncpp_lib as a object library." ON)
diff --git a/src/lib_json/CMakeLists.txt b/src/lib_json/CMakeLists.txt
index af26476..ace3f47 100644
--- a/src/lib_json/CMakeLists.txt
+++ b/src/lib_json/CMakeLists.txt
@@ -115,6 +115,11 @@ list(APPEND REQUIRED_FEATURES
         cxx_variadic_templates # Variadic templates, as defined in N2242.
 )
 
+if(JSONCPP_USE_CXX11_ABI)
+    set(GLIBCXX_USE_CXX11_ABI 1)
+else()
+    set(GLIBCXX_USE_CXX11_ABI 0)
+endif()
 
 if(BUILD_SHARED_LIBS)
     if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.12.0)
@@ -125,6 +130,9 @@ if(BUILD_SHARED_LIBS)
 
     set(SHARED_LIB ${PROJECT_NAME}_lib)
     add_library(${SHARED_LIB} SHARED ${PUBLIC_HEADERS} ${JSONCPP_SOURCES})
+    target_compile_definitions(${SHARED_LIB} PRIVATE
+        _GLIBCXX_USE_CXX11_ABI=${GLIBCXX_USE_CXX11_ABI}
+    )
     set_target_properties(${SHARED_LIB} PROPERTIES
         OUTPUT_NAME jsoncpp
         VERSION ${PROJECT_VERSION}
@@ -153,6 +161,9 @@ endif()
 if(BUILD_STATIC_LIBS)
     set(STATIC_LIB ${PROJECT_NAME}_static)
     add_library(${STATIC_LIB} STATIC ${PUBLIC_HEADERS} ${JSONCPP_SOURCES})
+    target_compile_definitions(${SHARED_LIB} PRIVATE
+        _GLIBCXX_USE_CXX11_ABI=${GLIBCXX_USE_CXX11_ABI}
+    )
 
     # avoid name clashes on windows as the shared import lib is alse named jsoncpp.lib
     if(NOT DEFINED STATIC_SUFFIX AND BUILD_SHARED_LIBS)
@@ -185,6 +196,9 @@ endif()
 if(BUILD_OBJECT_LIBS)
     set(OBJECT_LIB ${PROJECT_NAME}_object)
     add_library(${OBJECT_LIB} OBJECT ${PUBLIC_HEADERS} ${JSONCPP_SOURCES})
+    target_compile_definitions(${SHARED_LIB} PRIVATE
+        _GLIBCXX_USE_CXX11_ABI=${GLIBCXX_USE_CXX11_ABI}
+    )
 
     set_target_properties(${OBJECT_LIB} PROPERTIES
         OUTPUT_NAME jsoncpp