[WIP] Reduce BLAS dependency

.github/workflows/build.yml

@@ -21,13 +21,6 @@ jobs:
           python-version: 3.7
       - name: Install deps
         run: pip install "conan>=1.31.2"
-      - name: Install openblas
-        run: |
-          set -e
-          sudo apt-get update
-          sudo apt-get install -y libopenblas-dev
-        shell: bash
-        if: runner.os == 'Linux'
       - name: Add msbuild to PATH
         uses: microsoft/setup-msbuild@v1.0.2
         if: runner.os == 'Windows'
@@ -80,11 +73,11 @@ jobs:
           python-version: 3.7
       - name: Install deps
         run: pip install "conan>=1.31.2"
-      - name: Install openblas and mpi
+      - name: Install mpi
         run: |
           set -e
           sudo apt-get update
-          sudo apt-get install -y libopenblas-dev openmpi-bin libopenmpi-dev
+          sudo apt-get install -y openmpi-bin libopenmpi-dev
         shell: bash
       - name: Compile Standalone
         run: |

.github/workflows/deploy.yml

@@ -58,7 +58,7 @@ jobs:
         run: |
           python -m cibuildwheel --output-dir wheelhouse
         env:
-          CIBW_BEFORE_ALL_LINUX: "yum install -y https://dl.fedoraproject.org/pub/epel/7/aarch64/Packages/e/epel-release-7-12.noarch.rpm && yum install -y openblas-devel"
+          CIBW_BEFORE_ALL_LINUX: "yum install -y https://dl.fedoraproject.org/pub/epel/7/aarch64/Packages/e/epel-release-7-12.noarch.rpm"
           CIBW_ARCHS_LINUX: aarch64
       - uses: actions/upload-artifact@v2
         with:
@@ -134,7 +134,7 @@ jobs:
           python -m pip install cibuildwheel==2.2.2
       - name: Build wheels
         env:
-          CIBW_BEFORE_ALL: "yum install -y yum-utils wget && wget -q https://developer.download.nvidia.com/compute/cuda/10.1/Prod/local_installers/cuda-repo-rhel6-10-1-local-10.1.243-418.87.00-1.0-1.x86_64.rpm && rpm -i cuda-repo-rhel6-10-1-local-10.1.243-418.87.00-1.0-1.x86_64.rpm && yum clean all && yum -y install cuda-10-1 openblas-devel"
+          CIBW_BEFORE_ALL: "yum install -y yum-utils wget && wget -q https://developer.download.nvidia.com/compute/cuda/10.1/Prod/local_installers/cuda-repo-rhel6-10-1-local-10.1.243-418.87.00-1.0-1.x86_64.rpm && rpm -i cuda-repo-rhel6-10-1-local-10.1.243-418.87.00-1.0-1.x86_64.rpm && yum clean all && yum -y install cuda-10-1"
           CIBW_SKIP: "*-manylinux_i686 cp310* pp* cp36* *musllinux*"
           CIBW_ENVIRONMENT: QISKIT_AER_PACKAGE_NAME=qiskit-aer-gpu AER_THRUST_BACKEND=CUDA CUDACXX=/usr/local/cuda/bin/nvcc
         run: |
@@ -166,7 +166,7 @@ jobs:
           python -m pip install cibuildwheel==2.2.2
       - name: Build wheels
         env:
-          CIBW_BEFORE_ALL: "yum install -y yum-utils wget && wget -q https://developer.nvidia.com/compute/cuda/10.1/Prod/local_installers/cuda-repo-rhel7-10-1-local-10.1.105-418.39-1.0-1.x86_64.rpm && rpm -i cuda-repo-rhel7-10-1-local-10.1.105-418.39-1.0-1.x86_64.rpm && yum clean all && yum -y install cuda-10-1 openblas-devel"
+          CIBW_BEFORE_ALL: "yum install -y yum-utils wget && wget -q https://developer.nvidia.com/compute/cuda/10.1/Prod/local_installers/cuda-repo-rhel7-10-1-local-10.1.105-418.39-1.0-1.x86_64.rpm && rpm -i cuda-repo-rhel7-10-1-local-10.1.105-418.39-1.0-1.x86_64.rpm && yum clean all && yum -y install cuda-10-1"
           CIBW_BUILD: "cp310-manylinux_x86_64"
           CIBW_ENVIRONMENT: QISKIT_AER_PACKAGE_NAME=qiskit-aer-gpu AER_THRUST_BACKEND=CUDA CUDACXX=/usr/local/cuda/bin/nvcc
         run: |

.github/workflows/tests.yml

@@ -65,12 +65,6 @@ jobs:
             ${{ runner.os }}-${{ matrix.python-version}}-
       - name: Install Deps
         run: python -m pip install -U setuptools wheel virtualenv
-      - name: Install openblas
-        run: |
-          set -e
-          sudo apt-get update
-          sudo apt-get install -y libopenblas-dev
-        shell: bash
       - name: Build Sdist
         run: python setup.py sdist
       - name: Install from sdist and test
@@ -109,12 +103,6 @@ jobs:
             ${{ runner.os }}-${{ matrix.python-version}}-
       - name: Install Deps
         run: python -m pip install -U -c constraints.txt -r requirements-dev.txt wheel
-      - name: Install openblas
-        run: |
-          set -e
-          sudo apt-get update
-          sudo apt-get install -y libopenblas-dev
-        shell: bash
       - name: Install Aer
         run: python -m pip install -U .
       - name: Run Tests
@@ -151,12 +139,6 @@ jobs:
             ${{ runner.os }}-${{ matrix.python-version}}-
       - name: Install Deps
         run: python -m pip install -U -c constraints.txt -r requirements-dev.txt wheel
-      - name: Install openblas
-        run: |
-          set -e
-          sudo apt-get update
-          sudo apt-get install -y libopenblas-dev
-        shell: bash
       - name: Install Aer
         run: |
           set -e

CMakeLists.txt

@@ -54,7 +54,6 @@ endif()
 include(CTest)
 include(compiler_utils)
 include(Linter)
-include(findBLASInSpecificPath)
 include(dependency_utils)
 
 # Get version information
@@ -191,40 +190,6 @@ if(STATIC_LINKING)
 	set(BLA_STATIC TRUE)
 endif()
 
-if(AER_BLAS_LIB_PATH)
-	find_BLAS_in_specific_path(${AER_BLAS_LIB_PATH})
-else()
-	if(APPLE)
-		message(STATUS  "Looking for Apple BLAS & Lapack library...")
-		set(BLA_VENDOR "Apple")
-	else()
-		message(STATUS "Looking for OpenBLAS library...")
-		set(BLA_VENDOR "OpenBLAS")
-	endif()
-	if(WIN32)
-		message(STATUS "Uncompressing OpenBLAS static library...")
-		set(WIN_ARCH "win64" )
-		if("${CMAKE_SIZEOF_VOID_P}" STREQUAL "4") # Checking if win32 build
-			set(WIN_ARCH "win32")
-		endif()
-		execute_process(COMMAND ${CMAKE_COMMAND} -E tar "xvfj" "${AER_SIMULATOR_CPP_SRC_DIR}/third-party/${WIN_ARCH}/lib/openblas.7z" WORKING_DIRECTORY  "${AER_SIMULATOR_CPP_SRC_DIR}/third-party/${WIN_ARCH}/lib/")
-		set(BACKEND_REDIST_DEPS ${BACKEND_REDIST_DEPS} "${AER_SIMULATOR_CPP_SRC_DIR}/third-party/${WIN_ARCH}/lib/libopenblas.dll")
-		set(BLAS_LIBRARIES "${AER_SIMULATOR_CPP_SRC_DIR}/third-party/${WIN_ARCH}/lib/libopenblas.dll.a") # Seems CMake is unable to find it on its own
-		set(BLAS_FOUND True)
-	else()
-		find_package(BLAS QUIET)
-	endif()
-	if(NOT BLAS_FOUND)
-		message(STATUS "OpenBLAS not found. Looking for any other BLAS & Lapack libraries...")
-		unset(BLA_VENDOR)
-		find_package(BLAS REQUIRED)
-		find_package(LAPACK REQUIRED)
-		set(BLAS_LIBRARIES "${BLAS_LIBRARIES};${LAPACK_LIBRARIES}")
-	endif()
-endif()
-
-message(STATUS "BLAS library found: ${BLAS_LIBRARIES}")
-
 if(CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL "x86_64" OR CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL "AMD64")
     if(APPLE OR UNIX)
         if (NOT CMAKE_OSX_ARCHITECTURES STREQUAL "arm64")
@@ -316,9 +281,10 @@ endif()
 # Set dependent libraries
 set(AER_LIBRARIES
 	${AER_LIBRARIES}
-	${BLAS_LIBRARIES}
 	AER_DEPENDENCY_PKG::nlohmann_json
 	AER_DEPENDENCY_PKG::spdlog
+	AER_DEPENDENCY_PKG::openblas
+	${CONAN_PKG_LIBS_OPENBLAS}
 	Threads::Threads
 	${CMAKE_DL_LIBS}
 	${THRUST_DEPENDANT_LIBS}
@@ -337,7 +303,7 @@ else() # Standalone build
           # machine running the code has SIMD support
           set(SIMD_SOURCE_FILE "${PROJECT_SOURCE_DIR}/src/simulators/statevector/qv_avx2.cpp")
       endif()
-  endif()
+    endif()
 
 	set(AER_SIMULATOR_SOURCES "${PROJECT_SOURCE_DIR}/contrib/standalone/qasm_simulator.cpp")
 	set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)