From c9d87418db366bc4ac1f1c1c0649d457198da57b Mon Sep 17 00:00:00 2001
From: tqchen <tianqi.tchen@gmail.com>
Date: Sat, 28 Feb 2026 13:43:36 +0000
Subject: [PATCH] [CMAKE] Remove unused Libbacktrace.cmake

Libbacktrace is now built through tvm-ffi's own cmake infrastructure
(3rdparty/tvm-ffi/cmake/Utils/AddLibbacktrace.cmake). The legacy
cmake/libs/Libbacktrace.cmake is no longer referenced.
---
 cmake/libs/Libbacktrace.cmake | 66 -----------------------------------
 1 file changed, 66 deletions(-)
 delete mode 100644 cmake/libs/Libbacktrace.cmake

diff --git a/cmake/libs/Libbacktrace.cmake b/cmake/libs/Libbacktrace.cmake
deleted file mode 100644
index 2746c846fa5c..000000000000
--- a/cmake/libs/Libbacktrace.cmake
+++ /dev/null
@@ -1,66 +0,0 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License.  You may obtain a copy of the License at
-#
-#   http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied.  See the License for the
-# specific language governing permissions and limitations
-# under the License.
-
-# On MacOS, the default C compiler (/usr/bin/cc) is actually a small script that dispatches to a
-# compiler the default SDK (usually /Library/Developer/CommandLineTools/usr/bin/ or
-# /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/). CMake
-# automatically detects what is being dispatched and uses it instead along with all the flags it
-# needs. CMake makes this second compiler available through the CMAKE_C_COMPILER variable, but it
-# does not make the necessary flags available. This leads to configuration errors in libbacktrace
-# because it can't find system libraries. Our solution is to detect if CMAKE_C_COMPILER lives in
-# /Library or /Applications and switch to the default compiler instead.
-include(ExternalProject)
-
-
-if(CMAKE_SYSTEM_NAME MATCHES "Darwin" AND (CMAKE_C_COMPILER MATCHES "^/Library"
-  OR CMAKE_C_COMPILER MATCHES "^/Applications"))
-    set(c_compiler "/usr/bin/cc")
-  else()
-    set(c_compiler "${CMAKE_C_COMPILER}")
-endif()
-
-ExternalProject_Add(project_libbacktrace
-  PREFIX libbacktrace
-  SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/../../3rdparty/libbacktrace
-  BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/libbacktrace
-  CONFIGURE_COMMAND "${CMAKE_CURRENT_LIST_DIR}/../../3rdparty/libbacktrace/configure"
-                    "--prefix=${CMAKE_CURRENT_BINARY_DIR}/libbacktrace"
-                    --with-pic
-                    "CC=${c_compiler}"
-                    "CFLAGS=${CMAKE_C_FLAGS}"
-                    "LDFLAGS=${CMAKE_EXE_LINKER_FLAGS}"
-                    "CPP=${c_compiler} -E"
-                    "NM=${CMAKE_NM}"
-                    "STRIP=${CMAKE_STRIP}"
-                    "--host=${MACHINE_NAME}"
-  INSTALL_DIR "${CMAKE_CURRENT_BINARY_DIR}/libbacktrace"
-  BUILD_COMMAND make
-  INSTALL_COMMAND make install
-  BUILD_BYPRODUCTS "${CMAKE_CURRENT_BINARY_DIR}/libbacktrace/lib/libbacktrace.a"
-                   "${CMAKE_CURRENT_BINARY_DIR}/libbacktrace/include/backtrace.h"
-  )
-
-# Custom step to rebuild libbacktrace if any of the source files change
-tvm_file_glob(GLOB LIBBACKTRACE_SRCS "${CMAKE_CURRENT_LIST_DIR}/../../3rdparty/libbacktrace/*.c")
-ExternalProject_Add_Step(project_libbacktrace checkout
-  DEPENDERS configure
-  DEPENDEES download
-  DEPENDS ${LIBBACKTRACE_SRCS}
-)
-
-# create include directory so CMake doesn't complain
-file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/libbacktrace/include)