[libcxx-commits] [libcxx] [libc++] Use glibc random APIs for std::random_device on Linux (PR #222567)

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Thu Sep 10 02:44:09 PDT 2026


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``````````bash
git-clang-format --diff origin/main HEAD --extensions ,h,cpp -- libcxx/test/libcxx-03/numerics/rand/rand.device/abi.compile.pass.cpp libcxx/test/libcxx/numerics/rand/rand.device/abi.compile.pass.cpp libcxx/include/__config libcxx/include/__cxx03/__config libcxx/include/__cxx03/__random/random_device.h libcxx/include/__random/random_device.h --diff_from_common_commit
``````````

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in a stack if you are using a stacked PR workflow. You can limit the results by
changing `origin/main` to the base branch/commit you want to compare against.
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View the diff from clang-format here.
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``````````diff
diff --git a/libcxx/test/libcxx-03/numerics/rand/rand.device/abi.compile.pass.cpp b/libcxx/test/libcxx-03/numerics/rand/rand.device/abi.compile.pass.cpp
index 9106d6e05..c9555b174 100644
--- a/libcxx/test/libcxx-03/numerics/rand/rand.device/abi.compile.pass.cpp
+++ b/libcxx/test/libcxx-03/numerics/rand/rand.device/abi.compile.pass.cpp
@@ -14,7 +14,7 @@
 
 #include "test_macros.h"
 
-#if defined(_LIBCPP_USING_DEV_RANDOM) || \
+#if defined(_LIBCPP_USING_DEV_RANDOM) ||                                                                               \
     (!defined(_LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT) && (defined(__APPLE__) || defined(__GLIBC__)))
 
 static_assert(sizeof(std::random_device) == sizeof(int), "");
diff --git a/libcxx/test/libcxx/numerics/rand/rand.device/abi.compile.pass.cpp b/libcxx/test/libcxx/numerics/rand/rand.device/abi.compile.pass.cpp
index 9106d6e05..c9555b174 100644
--- a/libcxx/test/libcxx/numerics/rand/rand.device/abi.compile.pass.cpp
+++ b/libcxx/test/libcxx/numerics/rand/rand.device/abi.compile.pass.cpp
@@ -14,7 +14,7 @@
 
 #include "test_macros.h"
 
-#if defined(_LIBCPP_USING_DEV_RANDOM) || \
+#if defined(_LIBCPP_USING_DEV_RANDOM) ||                                                                               \
     (!defined(_LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT) && (defined(__APPLE__) || defined(__GLIBC__)))
 
 static_assert(sizeof(std::random_device) == sizeof(int), "");

``````````

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https://github.com/llvm/llvm-project/pull/222567


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