From b2bd74f7b563ff952c3fc436da3b4b976890a652 Mon Sep 17 00:00:00 2001
From: risemeup1 <62429225+risemeup1@users.noreply.github.com>
Date: Mon, 27 Mar 2023 11:22:40 +0800
Subject: [PATCH] fix_gcc12_error (#52007)

* fix_gcc12_error

* patch on eigen3 for fixing gcc12 error

* Update multiary.cc
---
 cmake/external/eigen.cmake       | 16 ++++++++++++++++
 paddle/phi/infermeta/multiary.cc |  2 +-
 patches/eigen/Complex.h.patch    | 13 +++++++++++++
 3 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100644 patches/eigen/Complex.h.patch

diff --git a/cmake/external/eigen.cmake b/cmake/external/eigen.cmake
index 31280a768b3..12ccf5df27c 100644
--- a/cmake/external/eigen.cmake
+++ b/cmake/external/eigen.cmake
@@ -41,6 +41,22 @@ elseif(LINUX)
   endif()
 endif()
 
+if(CMAKE_COMPILER_IS_GNUCC)
+  execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpfullversion -dumpversion
+                  OUTPUT_VARIABLE GCC_VERSION)
+  string(REGEX MATCHALL "[0-9]+" GCC_VERSION_COMPONENTS ${GCC_VERSION})
+  list(GET GCC_VERSION_COMPONENTS 0 GCC_MAJOR)
+  list(GET GCC_VERSION_COMPONENTS 1 GCC_MINOR)
+  set(GCC_VERSION "${GCC_MAJOR}.${GCC_MINOR}")
+  if(GCC_VERSION GREATER_EQUAL "12.0")
+    file(TO_NATIVE_PATH ${PADDLE_SOURCE_DIR}/patches/eigen/Complex.h.patch
+         complex_header)
+    set(EIGEN_PATCH_COMMAND
+        patch -d ${EIGEN_SOURCE_DIR}/Eigen/src/Core/arch/SSE/ <
+        ${complex_header})
+  endif()
+endif()
+
 set(EIGEN_INCLUDE_DIR ${EIGEN_SOURCE_DIR})
 include_directories(${EIGEN_INCLUDE_DIR})
 
diff --git a/paddle/phi/infermeta/multiary.cc b/paddle/phi/infermeta/multiary.cc
index 5cd480f425a..73e0ff975d9 100644
--- a/paddle/phi/infermeta/multiary.cc
+++ b/paddle/phi/infermeta/multiary.cc
@@ -2231,7 +2231,7 @@ void MultiDotInferMeta(const std::vector<const MetaTensor*>& x,
                         : phi::make_ddim({first_dim[0], last_dim[1]});
   }
 
-  auto width = first_dim[1];
+  auto width = first_dim.at(1);
   for (size_t i = 1; i < n - 1; i++) {
     PADDLE_ENFORCE_EQ(inputs_dims[i].size(),
                       static_cast<size_t>(2),
diff --git a/patches/eigen/Complex.h.patch b/patches/eigen/Complex.h.patch
new file mode 100644
index 00000000000..140e4ba8409
--- /dev/null
+++ b/patches/eigen/Complex.h.patch
@@ -0,0 +1,13 @@
+diff --git a/Eigen/src/Core/arch/SSE/Complex.h b/Eigen/src/Core/arch/SSE/Complex.h
+index f6f1b8c..2f4e7d1 100644
+--- a/Eigen/src/Core/arch/SSE/Complex.h
++++ b/Eigen/src/Core/arch/SSE/Complex.h
+@@ -17,7 +17,7 @@ namespace internal {
+ //---------- float ----------
+ struct Packet2cf
+ {
+-  EIGEN_STRONG_INLINE Packet2cf() {}
++  EIGEN_STRONG_INLINE Packet2cf() :v(_mm_setzero_ps()) {}
+   EIGEN_STRONG_INLINE explicit Packet2cf(const __m128& a) : v(a) {}
+   __m128  v;
+ };
-- 
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