[libcxx-commits] [libcxx] [libcxxabi] [libc++] Expand Android libc++ test config files (PR #142846)

[via libcxx-commits]

https://github.com/tynasello-google created https://github.com/llvm/llvm-project/pull/142846

Parameterize (and rename) existing libc++/libc++abi test configuration files for the Android NDK to work for both the NDK and platform.

Android LLVM downstream seeks to test libc++ for both the NDK and platform build (currently only testing the NDK), which will use almost identical test configuration files. The only difference is the name of the libc++ shared object used. Because of this we parameterize the current test files (for both libc++ and libc++abi) with the existing LIBCXX_SHARED_OUTPUT_NAME cmake variable, and rename the file accordingly.

>From 3d193bbcabde9f2d441dc86956a353b20fc5ac72 Mon Sep 17 00:00:00 2001
From: Ty Nasello <tynasello at google.com>
Date: Tue, 3 Jun 2025 21:30:04 +0000
Subject: [PATCH] [libc++] Expand Android libc++ test config files

Parameterize (and rename) existing libc++/libc++abi test configuration
files for the Android NDK to work for both the NDK and platform.

Android LLVM downstream seeks to test libc++ for both the NDK and
platform build (currently only testing the NDK), which will use almost
identical test configuration files. The only difference is the name of
the libc++ shared object used. Because of this we parameterize the
current test files (for both libc++ and libc++abi) with the existing
LIBCXX_SHARED_OUTPUT_NAME cmake variable, and rename the file
accordingly.
---
 libcxx/cmake/caches/AndroidNDK.cmake                 |  4 ++--
 ...android-ndk.cfg.in => llvm-libc++-android.cfg.in} | 10 +++++-----
 ...roid-ndk.cfg.in => llvm-libc++abi-android.cfg.in} | 12 ++++++------
 3 files changed, 13 insertions(+), 13 deletions(-)
 rename libcxx/test/configs/{llvm-libc++-android-ndk.cfg.in => llvm-libc++-android.cfg.in} (83%)
 rename libcxxabi/test/configs/{llvm-libc++abi-android-ndk.cfg.in => llvm-libc++abi-android.cfg.in} (72%)

diff --git a/libcxx/cmake/caches/AndroidNDK.cmake b/libcxx/cmake/caches/AndroidNDK.cmake
index 298518781e9b7..1a04b7fbb217d 100644
--- a/libcxx/cmake/caches/AndroidNDK.cmake
+++ b/libcxx/cmake/caches/AndroidNDK.cmake
@@ -33,5 +33,5 @@ set(CMAKE_CXX_COMPILER_WORKS ON CACHE BOOL "")
 
 # Use adb to push tests to a locally-connected device (e.g. emulator) and run
 # them.
-set(LIBCXX_TEST_CONFIG "llvm-libc++-android-ndk.cfg.in" CACHE STRING "")
-set(LIBCXXABI_TEST_CONFIG "llvm-libc++abi-android-ndk.cfg.in" CACHE STRING "")
+set(LIBCXX_TEST_CONFIG "llvm-libc++-android.cfg.in" CACHE STRING "")
+set(LIBCXXABI_TEST_CONFIG "llvm-libc++abi-android.cfg.in" CACHE STRING "")
diff --git a/libcxx/test/configs/llvm-libc++-android-ndk.cfg.in b/libcxx/test/configs/llvm-libc++-android.cfg.in
similarity index 83%
rename from libcxx/test/configs/llvm-libc++-android-ndk.cfg.in
rename to libcxx/test/configs/llvm-libc++-android.cfg.in
index 31a07f6471651..9362c68e8f7a8 100644
--- a/libcxx/test/configs/llvm-libc++-android-ndk.cfg.in
+++ b/libcxx/test/configs/llvm-libc++-android.cfg.in
@@ -1,5 +1,5 @@
 # This testing configuration handles running the test suite against LLVM's
-# libc++ using adb and a libc++_shared.so library on Android.
+# libc++ using adb on Android.
 
 lit_config.load_config(config, '@CMAKE_CURRENT_BINARY_DIR@/cmake-bridge.cfg')
 
@@ -27,11 +27,11 @@ if re.match(r'i686-linux-android(21|22|23)$', config.target_triple):
     compile_flags += ' -mstackrealign'
 config.substitutions.append(('%{compile_flags}', compile_flags))
 
-# The NDK library is called "libc++_shared.so". Use LD_LIBRARY_PATH to find
-# libc++_shared.so because older Bionic dynamic loaders don't support rpath
-# lookup.
+# The platform library is called "libc++.so" and the NDK library is called "libc++_shared.so". 
+# Use LD_LIBRARY_PATH to find the libcxx shared object because older Bionic dynamic loaders 
+# don't support rpath lookup.
 config.substitutions.append(('%{link_flags}',
-    '-nostdlib++ -L %{lib-dir} -lc++_shared'
+    '-nostdlib++ -L %{lib-dir} -l at LIBCXX_SHARED_OUTPUT_NAME@'
 ))
 config.substitutions.append(('%{exec}',
     '%{executor}' +
diff --git a/libcxxabi/test/configs/llvm-libc++abi-android-ndk.cfg.in b/libcxxabi/test/configs/llvm-libc++abi-android.cfg.in
similarity index 72%
rename from libcxxabi/test/configs/llvm-libc++abi-android-ndk.cfg.in
rename to libcxxabi/test/configs/llvm-libc++abi-android.cfg.in
index f2cb62a32d4e8..bc58446615361 100644
--- a/libcxxabi/test/configs/llvm-libc++abi-android-ndk.cfg.in
+++ b/libcxxabi/test/configs/llvm-libc++abi-android.cfg.in
@@ -1,5 +1,5 @@
 # This testing configuration handles running the test suite against LLVM's
-# libc++abi using adb and a libc++_shared.so library on Android.
+# libc++abi using adb on Android.
 
 lit_config.load_config(config, '@CMAKE_CURRENT_BINARY_DIR@/cmake-bridge.cfg')
 
@@ -19,12 +19,12 @@ config.substitutions.append(('%{compile_flags}',
     '-nostdinc++ -I %{include} -I %{cxx-include} -I %{cxx-target-include} %{maybe-include-libunwind} -I %{libcxx}/test/support -I %{libcxx}/src -D_LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS'
 ))
 
-# The NDK library is called "libc++_shared.so". Use LD_LIBRARY_PATH to find
-# libc++_shared.so because older Bionic dynamic loaders don't support rpath
-# lookup. The Android libc++ shared library exports libc++abi, so we don't need
-# to link with -lc++abi.
+# The platform library is called "libc++.so" and the NDK library is called "libc++_shared.so". 
+# Use LD_LIBRARY_PATH to find the libcxx shared object because older Bionic dynamic loaders 
+# don't support rpath lookup. The Android libc++ shared library exports libc++abi, so we 
+# don't need to link with -lc++abi.
 config.substitutions.append(('%{link_flags}',
-    '-nostdlib++ -L %{lib} -lc++_shared'
+    '-nostdlib++ -L %{lib} -l at LIBCXX_SHARED_OUTPUT_NAME@'
 ))
 config.substitutions.append(('%{exec}',
     '%{executor}' +