add cmake openmp ci

.github/workflows/cmake_openmp.yml

@@ -0,0 +1,25 @@
+---
+name: CMake OpenMP
+
+on: [push, pull_request]
+
+jobs:
+  linux:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - run: |
+          sudo apt-get install libopenblas-dev liblapack-dev
+          mkdir out
+          export INSTALL_DIR=$PWD/out
+          export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$INSTALL_DIR/lib
+          mkdir build
+          cd build
+          cmake -DUSE_OPENMP=ON -DBUILD_TESTING=ON -DCMAKE_INSTALL_PREFIX:PATH=$INSTALL_DIR ..
+          make
+          make install
+          ctest --output-on-failure
+          cd ../docs/src/examples/
+          gcc -I$INSTALL_DIR/include/scs -L$INSTALL_DIR/lib/ qp.c -o qp.out -lscsdir
+          ./qp.out
+

CMakeLists.txt

@@ -121,6 +121,10 @@ message(STATUS "Printing is NOT ${NO_PRINTING}")
 option(NO_READ_WRITE "Disables all read/write functionality" OFF)
 message(STATUS "Read/write functionality is NOT ${NO_READ_WRITE}")
 
+# Enable OpenMP support
+option(USE_OPENMP "Compile with OpenMP support" OFF)
+message(STATUS "OpenMP parallelization is ${USE_OPENMP}")
+
 set(COMPILER_OPTS "-DUSE_LAPACK -DCTRLC")
 
 # Primitive types
@@ -146,7 +150,12 @@ if(NO_READ_WRITE)
   set(COMPILER_OPTS "-DNO_READ_WRITE=1 ${COMPILER_OPTS}")
 endif()
 
+if(USE_OPENMP)
+  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fopenmp")
+endif()
+
 message(STATUS "COMPILER_OPTS = ${COMPILER_OPTS}")
+message(STATUS "CMAKE_C_FLAGS = ${CMAKE_C_FLAGS}")
 
 # TODO this is a hack that overwrites the scs_types.h file, we should find a way
 # to do this that doesn't pollute the master directory.