[dev] link directly to system libunwind

.ci_support/linux_64_.yaml

@@ -14,8 +14,6 @@ cxx_compiler_version:
 - '13'
 docker_image:
 - quay.io/condaforge/linux-anvil-cos7-x86_64
-libunwind:
-- '1.6'
 target_platform:
 - linux-64
 zip_keys:

recipe/build.sh

@@ -5,7 +5,7 @@ LLVM_PREFIX=$PREFIX
 if [[ "$target_platform" == osx-* ]]; then
  export CFLAGS="$CFLAGS -isysroot $CONDA_BUILD_SYSROOT"
  export CXXFLAGS="$CXXFLAGS -isysroot $CONDA_BUILD_SYSROOT"
- export LDFLAGS="$LDFLAGS -isysroot $CONDA_BUILD_SYSROOT"
+ export LDFLAGS="$LDFLAGS -isysroot $CONDA_BUILD_SYSROOT -framework CoreFoundation"
 
  export CMAKE_EXTRA_ARGS="-DCMAKE_OSX_SYSROOT=$CONDA_BUILD_SYSROOT -DLIBCXX_ENABLE_VENDOR_AVAILABILITY_ANNOTATIONS=ON"
 fi
@@ -41,15 +41,4 @@ ninja -C build install-cxx install-cxxabi install-unwind
 if [[ "$target_platform" == osx-* ]]; then
  # on osx we point libc++ to the system libc++abi
  $INSTALL_NAME_TOOL -change "@rpath/libc++abi.1.dylib" "/usr/lib/libc++abi.dylib" $PREFIX/lib/libc++.1.0.dylib
- # same for libunwind
- $INSTALL_NAME_TOOL -change "@rpath/libunwind.1.dylib" "/usr/lib/system/libunwind.dylib" $PREFIX/lib/libc++.1.0.dylib
-else
- # point libcxxabi & libcxx (the actual libs, not the symlinks) to the
- # libunwind from https://github.com/conda-forge/libunwind-feedstock
- for f in $PREFIX/lib/libc++abi.so.1.0 $PREFIX/lib/libc++.so.1.0; do
- # first SOVER is the one from LLVM, the second is what we're replacing it with
- patchelf --replace-needed libunwind.so.1 libunwind.so.8 --output patched $f
- chmod +x patched
- mv patched $f
- done
 fi

recipe/meta.yaml

@@ -8,14 +8,16 @@ source:
  - url: https://github.com/llvm/llvm-project/archive/refs/tags/llvmorg-{{ version.replace(".rc", "-rc") }}.tar.gz
  sha256: 09c08693a9afd6236f27a2ebae62cda656eba19021ef3f94d59e931d662d4856
  patches:
- - patches/0003-custom-error-message-for-old-sdk.patch
+ # See https://discourse.llvm.org/t/shipping-custom-libc-on-macos/58606
+ - patches/0001-Fix-ABI-compatibility-with-system.patch # [sys_abi == "pre-12"]
+ - patches/0002-custom-error-message-for-old-sdk.patch
  # disable feature that requires up-to-date libcxxabi, which we don't ship
- - patches/0005-disable-_LIBCPP_AVAILABILITY_HAS_INIT_PRIMARY_EXCEPT.patch
+ - patches/0003-disable-_LIBCPP_AVAILABILITY_HAS_INIT_PRIMARY_EXCEPT.patch
  # work around https://github.com/llvm/llvm-project/issues/90332
- - patches/0006-Work-around-stray-nostdlib-flags-causing-errors-with.patch
+ - patches/0004-Work-around-stray-nostdlib-flags-causing-errors-with.patch
 
 build:
- number: 5
+ number: 6
  skip: true # [win]
  skip: true # [ppc64le or aarch64]
  ignore_run_exports:
@@ -30,11 +32,9 @@ requirements:
  - {{ compiler('cxx') }}
  - {{ stdlib('c') }}
  - python >3 # [not osx]
- - patchelf # [linux]
  host:
  - clangdev {{ version }} # [not osx]
  - llvmdev {{ version }} # [not osx]
- - libunwind # [linux]
 
 outputs:
  - name: libcxx
@@ -52,7 +52,6 @@ outputs:
  - {{ compiler('cxx') }}
  - {{ stdlib('c') }}
  host:
- - {{ pin_subpackage("libcxxabi", exact=True) }} # [linux]
  run:
  - {{ pin_subpackage("libcxxabi", exact=True) }} # [linux]
  run_constrained:
@@ -110,10 +109,6 @@ outputs:
  build:
  # for run-exports
  - {{ stdlib('c') }}
- host:
- - libunwind # [linux]
- run:
- - libunwind # [linux]
  test:
  commands:
  - test -f $PREFIX/lib/libc++abi.so # [linux]

recipe/patches/0002-Fix-ABI-compatibility-with-system.patch → recipe/patches/0001-Fix-ABI-compatibility-with-system.patch

@@ -1,7 +1,7 @@
-From b1113a136e91b0788e2fa28e578142e45016eae9 Mon Sep 17 00:00:00 2001
+From b461291f007bc7457a5a7f7219cd0943b8e7ba3d Mon Sep 17 00:00:00 2001
 From: Isuru Fernando <[email protected]>
 Date: Tue, 13 Jul 2021 01:57:06 -0500
-Subject: [PATCH 2/5] Fix ABI compatibility with system
+Subject: [PATCH 1/4] Fix ABI compatibility with system
 
 ---
  libcxx/src/locale.cpp | 16 ++++++++--------

recipe/patches/0003-custom-error-message-for-old-sdk.patch → recipe/patches/0002-custom-error-message-for-old-sdk.patch

@@ -1,7 +1,7 @@
-From 7e2722ee435b20f9445be40ace0f5298126ae23c Mon Sep 17 00:00:00 2001
+From bacfd686f6d24164b4c6bbdc8cdf022740106991 Mon Sep 17 00:00:00 2001
 From: Isuru Fernando <[email protected]>
 Date: Wed, 29 Dec 2021 19:28:35 -0800
-Subject: [PATCH 3/5] custom error message for old sdk
+Subject: [PATCH 2/4] custom error message for old sdk
 
 Co-Authored-By: H. Vetinari <[email protected]>
 ---

recipe/patches/0005-disable-_LIBCPP_AVAILABILITY_HAS_INIT_PRIMARY_EXCEPT.patch → recipe/patches/0003-disable-_LIBCPP_AVAILABILITY_HAS_INIT_PRIMARY_EXCEPT.patch

@@ -1,7 +1,7 @@
-From 4744d322ef96d67b8543897b49ec8897d2633a1a Mon Sep 17 00:00:00 2001
+From b696d088e01cfa8b3e7dd226342ca37bd8c95621 Mon Sep 17 00:00:00 2001
 From: "H. Vetinari" <[email protected]>
 Date: Sun, 26 May 2024 22:04:04 +1100
-Subject: [PATCH 4/5] disable _LIBCPP_AVAILABILITY_HAS_INIT_PRIMARY_EXCEPTION
+Subject: [PATCH 3/4] disable _LIBCPP_AVAILABILITY_HAS_INIT_PRIMARY_EXCEPTION
  unconditionally
 
 When _LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS is not defined, things

recipe/patches/0006-Work-around-stray-nostdlib-flags-causing-errors-with.patch → recipe/patches/0004-Work-around-stray-nostdlib-flags-causing-errors-with.patch

@@ -1,14 +1,33 @@
-From 6a49c1d89912796cd7ea3f4a9e3eb606ca553257 Mon Sep 17 00:00:00 2001
+From 46bea2a31254d1d997c220685742f68f02f1f351 Mon Sep 17 00:00:00 2001
 From: "H. Vetinari" <[email protected]>
 Date: Sun, 26 May 2024 13:01:28 +1100
-Subject: [PATCH 5/5] Work around stray `-nostdlib++` flags causing errors with
+Subject: [PATCH 4/4] Work around stray `-nostdlib++` flags causing errors with
  C compiler
 
 ---
+ libcxxabi/cmake/config-ix.cmake | 7 +++++--
  libunwind/cmake/config-ix.cmake | 7 +++++--
  libunwind/src/CMakeLists.txt | 6 ++++--
- 2 files changed, 9 insertions(+), 4 deletions(-)
+ 3 files changed, 14 insertions(+), 6 deletions(-)
 
+diff --git a/libcxxabi/cmake/config-ix.cmake b/libcxxabi/cmake/config-ix.cmake
+index 10f2087c68c5..c0e58f8b255c 100644
+--- a/libcxxabi/cmake/config-ix.cmake
++++ b/libcxxabi/cmake/config-ix.cmake
+@@ -106,8 +106,11 @@ elseif(ANDROID)
+ check_library_exists(c __cxa_thread_atexit_impl ""
+ LIBCXXABI_HAS_CXA_THREAD_ATEXIT_IMPL)
+ else()
+- check_library_exists(dl dladdr "" LIBCXXABI_HAS_DL_LIB)
+- check_library_exists(pthread pthread_once "" LIBCXXABI_HAS_PTHREAD_LIB)
++ # misdetected due to https://github.com/llvm/llvm-project/issues/90332
++ # check_library_exists(dl dladdr "" LIBCXXABI_HAS_DL_LIB)
++ # check_library_exists(pthread pthread_once "" LIBCXXABI_HAS_PTHREAD_LIB)
++ set(LIBCXXABI_HAS_DL_LIB YES)
++ set(LIBCXXABI_HAS_PTHREAD_LIB YES)
+ check_library_exists(c __cxa_thread_atexit_impl ""
+ LIBCXXABI_HAS_CXA_THREAD_ATEXIT_IMPL)
+ endif()
 diff --git a/libunwind/cmake/config-ix.cmake b/libunwind/cmake/config-ix.cmake
 index 126c872f0d48..ab9ea1d5ce01 100644
 --- a/libunwind/cmake/config-ix.cmake