[BuildBot] Modify configure script (#1421)

 * use "--no-ocl" by default -> new "--system-ocl" flag (use system
   OpenCL headers and do not download)
* add `--no-werror` to not treat warnings as errors
 * don't exclude buildbot dir in gitignore

Signed-off-by: hiaselhans <simon.klemenc@gmail.com>
Co-authored-by: Alexey Bader <alexey.bader@intel.com>

Author: hiaselhans

.github/workflows/linux_post_commit.yml

@@ -35,7 +35,7 @@ jobs:
          mkdir -p $GITHUB_WORKSPACE/build
          cd $GITHUB_WORKSPACE/build
          python3 $GITHUB_WORKSPACE/src/buildbot/configure.py -w $GITHUB_WORKSPACE \
-         -s $GITHUB_WORKSPACE/src -o $GITHUB_WORKSPACE/build -t Release --no-ocl $ARGS
+         -s $GITHUB_WORKSPACE/src -o $GITHUB_WORKSPACE/build -t Release $ARGS
      - name: Compile
        run: |
          python3 $GITHUB_WORKSPACE/src/buildbot/compile.py -w  $GITHUB_WORKSPACE \

.gitignore

@@ -23,6 +23,7 @@
 
 # Nested build directory
 /build*
+!buildbot
 
 #==============================================================================#
 # Explicit files to ignore (only matches one).

buildbot/configure.py

@@ -26,6 +26,7 @@ def do_configure(args):
     llvm_enable_projects = 'clang;llvm-spirv;sycl;opencl-aot;xpti;libdevice'
     libclc_targets_to_build = ''
     sycl_build_pi_cuda = 'OFF'
+    sycl_werror = 'ON'
     llvm_enable_assertions = 'ON'
     llvm_enable_doxygen = 'OFF'
     llvm_enable_sphinx = 'OFF'
@@ -42,6 +43,9 @@ def do_configure(args):
         libclc_targets_to_build = 'nvptx64--;nvptx64--nvidiacl'
         sycl_build_pi_cuda = 'ON'
 
+    if args.no_werror:
+        sycl_werror = 'OFF'
+
     if args.no_assertions:
         llvm_enable_assertions = 'OFF'
 
@@ -69,7 +73,7 @@ def do_configure(args):
         "-DLIBCLC_TARGETS_TO_BUILD={}".format(libclc_targets_to_build),
         "-DSYCL_BUILD_PI_CUDA={}".format(sycl_build_pi_cuda),
         "-DLLVM_BUILD_TOOLS=ON",
-        "-DSYCL_ENABLE_WERROR=ON",
+        "-DSYCL_ENABLE_WERROR={}".format(sycl_werror),
         "-DCMAKE_INSTALL_PREFIX={}".format(install_dir),
         "-DSYCL_INCLUDE_TESTS=ON", # Explicitly include all kinds of SYCL tests.
         "-DLLVM_ENABLE_DOXYGEN={}".format(llvm_enable_doxygen),
@@ -78,7 +82,7 @@ def do_configure(args):
         "-DSYCL_ENABLE_XPTI_TRACING=ON" # Explicitly turn on XPTI tracing
     ]
 
-    if not args.no_ocl:
+    if args.system_ocl:
       cmake_cmd.extend([
             "-DOpenCL_INCLUDE_DIR={}".format(ocl_header_dir),
             "-DOpenCL_LIBRARY={}".format(icd_loader_lib)])
@@ -120,7 +124,8 @@ def main():
     parser.add_argument("--cuda", action='store_true', help="switch from OpenCL to CUDA")
     parser.add_argument("--no-assertions", action='store_true', help="build without assertions")
     parser.add_argument("--docs", action='store_true', help="build Doxygen documentation")
-    parser.add_argument("--no-ocl", action='store_true', help="download OpenCL deps via CMake")
+    parser.add_argument("--system-ocl", action='store_true', help="use OpenCL deps from system (no download)")
+    parser.add_argument("--no-werror", action='store_true', help="Don't treat warnings as errors")
     parser.add_argument("--shared-libs", action='store_true', help="Build shared libraries")
     parser.add_argument("--cmake-opt", action='append', help="Additional CMake option not configured via script parameters")
 

sycl/doc/GetStartedGuide.md

@@ -93,7 +93,8 @@ python %DPCPP_HOME%\llvm\buildbot\compile.py -s %DPCPP_HOME%\llvm -o %DPCPP_HOME
 
 You can use the following flags with `configure.py`:
 
- * `--no-ocl` -> Download OpenCL deps via cmake (can be useful in case of troubles)
+ * `--system-ocl` -> Don't Download OpenCL deps via cmake but use the system ones
+ * `--no-werror` -> Don't treat warnings as errors when compiling llvm
  * `--cuda` -> use the cuda backend (see [Nvidia CUDA](#build-dpc-toolchain-with-support-for-nvidia-cuda))
  * `--shared-libs` -> Build shared libraries
  * `-t` -> Build type (debug or release)