36 lines
1.2 KiB
Diff
36 lines
1.2 KiB
Diff
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From dfbbc505817bd0c3e01af5865196629c2a2a2b5e Mon Sep 17 00:00:00 2001
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From: Marie Ramlow <me@nycode.dev>
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Date: Wed, 10 Sep 2025 20:12:39 +0200
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Subject: [PATCH] Check if libatomic is needed
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---
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c++/src/kj/CMakeLists.txt | 15 +++++++++++++++
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1 file changed, 15 insertions(+)
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diff --git a/c++/src/kj/CMakeLists.txt b/c++/src/kj/CMakeLists.txt
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index 7114ddb80e..8ce355b8b0 100644
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--- a/c++/src/kj/CMakeLists.txt
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+++ b/c++/src/kj/CMakeLists.txt
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@@ -84,6 +84,21 @@ target_compile_features(kj PUBLIC cxx_std_20)
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if(UNIX AND NOT ANDROID)
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target_link_libraries(kj PUBLIC pthread)
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endif()
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+
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+include(CheckCXXSourceCompiles)
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+check_cxx_source_compiles("#include <atomic>
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+int main() {
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+ std::atomic<uint8_t> w1;
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+ std::atomic<uint16_t> w2;
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+ std::atomic<uint32_t> w4;
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+ std::atomic<uint64_t> w8;
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+ return ++w1 + ++w2 + ++w4 + ++w8;
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+}" CAPNP_BUILDS_WITHOUT_LIBATOMIC)
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+
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+if(NOT CAPNP_BUILDS_WITHOUT_LIBATOMIC)
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+ target_link_libraries(kj PUBLIC atomic)
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+endif()
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+
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#make sure the lite flag propagates to all users (internal + external) of this library
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target_compile_definitions(kj PUBLIC ${CAPNP_LITE_FLAG})
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#make sure external consumers don't need to manually set the include dirs
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