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Dmitry Shachnev
3 years ago
commit
fec0a88773
@ -0,0 +1,82 @@
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From 4088b27b9397fa9877bf60b8e707bba5dc51e9cb Mon Sep 17 00:00:00 2001
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From: Moody Liu <mooodyhunter@outlook.com>
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Date: Tue, 12 Apr 2022 10:40:00 +0100
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Subject: [PATCH] Explicitly check for atomic addition and relaxed load
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operation support
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...and properly find and link against `libatomic` using find_library.
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This fixes the qtdeclarative build on the RISC-V platform.
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Initial-patch-by: Sprite <SpriteOvO@gmail.com>
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Pick-to: 6.2
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Pick-to: 6.3
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Task-number: QTBUG-99234
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Change-Id: I2b5e4812886ce45cb02bed3106ce8c519b294cbe
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Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
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---
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cmake/FindWrapAtomic.cmake | 34 +++++++++++++++++++---------------
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1 file changed, 19 insertions(+), 15 deletions(-)
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diff --git a/cmake/FindWrapAtomic.cmake b/cmake/FindWrapAtomic.cmake
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index c2582bdd6b..3ea72bb188 100644
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--- a/cmake/FindWrapAtomic.cmake
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+++ b/cmake/FindWrapAtomic.cmake
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@@ -10,35 +10,39 @@ include(CheckCXXSourceCompiles)
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set (atomic_test_sources "#include <atomic>
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#include <cstdint>
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-void test(volatile std::atomic<std::int64_t> &a)
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-{
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- std::int64_t v = a.load(std::memory_order_acquire);
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- while (!a.compare_exchange_strong(v, v + 1,
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- std::memory_order_acq_rel,
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- std::memory_order_acquire)) {
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- v = a.exchange(v - 1);
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- }
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- a.store(v + 1, std::memory_order_release);
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-}
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-
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int main(int, char **)
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{
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- void *ptr = (void*)0xffffffc0; // any random pointer
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- test(*reinterpret_cast<std::atomic<std::int64_t> *>(ptr));
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+ volatile std::atomic<char> size_1;
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+ volatile std::atomic<short> size_2;
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+ volatile std::atomic<int> size_4;
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+ volatile std::atomic<int64_t> size_8;
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+
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+ ++size_1;
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+ ++size_2;
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+ ++size_4;
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+ ++size_8;
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+
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+ (void)size_1.load(std::memory_order_relaxed);
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+ (void)size_2.load(std::memory_order_relaxed);
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+ (void)size_4.load(std::memory_order_relaxed);
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+ (void)size_8.load(std::memory_order_relaxed);
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+
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return 0;
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}")
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check_cxx_source_compiles("${atomic_test_sources}" HAVE_STDATOMIC)
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if(NOT HAVE_STDATOMIC)
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set(_req_libraries "${CMAKE_REQUIRED_LIBRARIES}")
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- set(CMAKE_REQUIRED_LIBRARIES "atomic")
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+ find_library(atomic_LIB atomic REQUIRED)
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+ set(CMAKE_REQUIRED_LIBRARIES ${atomic_LIB})
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check_cxx_source_compiles("${atomic_test_sources}" HAVE_STDATOMIC_WITH_LIB)
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set(CMAKE_REQUIRED_LIBRARIES "${_req_libraries}")
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endif()
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add_library(WrapAtomic::WrapAtomic INTERFACE IMPORTED)
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if(HAVE_STDATOMIC_WITH_LIB)
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- target_link_libraries(WrapAtomic::WrapAtomic INTERFACE atomic)
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+ # atomic_LIB is already found above.
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+ target_link_libraries(WrapAtomic::WrapAtomic INTERFACE ${atomic_LIB})
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endif()
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set(WrapAtomic_FOUND 1)
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--
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2.35.1
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@ -0,0 +1,35 @@
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From e2a8b0adbd099cfda84e931f6a24f34e80b12fd7 Mon Sep 17 00:00:00 2001
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From: Dmitry Shachnev <mitya57@gmail.com>
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Date: Sat, 7 May 2022 20:51:25 +0300
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Subject: [PATCH] Hardcode atomic_LIB as -latomic
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find_library does not always work because libatomic.so may be in a path
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like /usr/lib/gcc/x86_64-linux-gnu/11/libatomic.so, which CMake does not
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consider by default.
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Pick-to: 6.3
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Change-Id: I73a657c470efa4f84f8629bd531edfcac3b3a352
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Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
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Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
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Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
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---
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cmake/FindWrapAtomic.cmake | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/cmake/FindWrapAtomic.cmake b/cmake/FindWrapAtomic.cmake
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index 3ea72bb188..006be0ed8f 100644
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--- a/cmake/FindWrapAtomic.cmake
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+++ b/cmake/FindWrapAtomic.cmake
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@@ -33,7 +33,7 @@ int main(int, char **)
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check_cxx_source_compiles("${atomic_test_sources}" HAVE_STDATOMIC)
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if(NOT HAVE_STDATOMIC)
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set(_req_libraries "${CMAKE_REQUIRED_LIBRARIES}")
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- find_library(atomic_LIB atomic REQUIRED)
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+ set(atomic_LIB "-latomic")
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set(CMAKE_REQUIRED_LIBRARIES ${atomic_LIB})
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check_cxx_source_compiles("${atomic_test_sources}" HAVE_STDATOMIC_WITH_LIB)
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set(CMAKE_REQUIRED_LIBRARIES "${_req_libraries}")
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--
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2.35.1
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