https://github.com/Z3Prover/z3/commit/3d87d86c2825437780167ae6ff8f5b203f15ee7f.patch
https://bugs.gentoo.org/835003

From b2b407cdedc586f8d11f9dd029e1c3016c80bba7 Mon Sep 17 00:00:00 2001
From: Revy <rabenda.cn@gmail.com>
Date: Tue, 15 Mar 2022 02:11:40 +0800
Subject: [PATCH] fix: build on non-x86 platform

Signed-off-by: Revy <rabenda.cn@gmail.com>
---
 CMakeLists.txt                |  5 +++++
 cmake/check_link_atomic.cmake | 23 +++++++++++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 cmake/check_link_atomic.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index be300607dd..477410ba8d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -431,6 +431,11 @@ if (CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
   string(APPEND CMAKE_SHARED_LINKER_FLAGS " /RELEASE")
 endif()
 
+################################################################################
+# Check atomic linking as needed
+################################################################################
+include(${PROJECT_SOURCE_DIR}/cmake/check_link_atomic.cmake)
+
 ################################################################################
 # Report default CMake flags
 ################################################################################
diff --git a/cmake/check_link_atomic.cmake b/cmake/check_link_atomic.cmake
new file mode 100644
index 0000000000..d462191a0b
--- /dev/null
+++ b/cmake/check_link_atomic.cmake
@@ -0,0 +1,23 @@
+set(ATOMIC_TEST_SOURCE "
+#include <atomic>
+std::atomic<int> x;
+std::atomic<short> y;
+std::atomic<char> z;
+std::atomic<long long> w;
+int main() {
+	++z;
+	++y;
+    ++w;
+	return ++x;
+}")
+CHECK_CXX_SOURCE_COMPILES("${ATOMIC_TEST_SOURCE}" BUILTIN_ATOMIC)
+if (NOT BUILTIN_ATOMIC)
+  set(CMAKE_REQUIRED_LIBRARIES atomic)
+  CHECK_CXX_SOURCE_COMPILES("${ATOMIC_TEST_SOURCE}" ATOMICS_REQUIRE_LIBATOMIC)
+  unset(CMAKE_REQUIRED_LIBRARIES)
+  if (ATOMICS_REQUIRE_LIBATOMIC)
+    list(APPEND Z3_DEPENDENT_LIBS atomic)
+  else()
+    message(FATAL_ERROR "Host compiler must support std::atomic!")
+  endif()
+endif()