ROOT 6.24 failed to build with GCC10 or 11 on ppc64le arch

[smuzaffar]

Thanks for fixing the root 6.24 build issues for ppc64le with gcc9.3 ( #9297) but looks like we still have build issues with GCC 10.3 and 11.2. We get build errors like [a] full build log is available at https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8678b1/21211/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/log

FYI @vgvassilev @hahnjo

[a] cms-sw/cmsdist#7500 (comment)

/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/slc7_ppc64le_gcc10/external/gcc/10.3.0-84898dea653199466402e67d73657f10/bin/g++ -DGTEST_HAS_RTTI=0 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Iinterpreter/llvm/src/tools/clang/lib/Lex -I/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/tools/clang/lib/Lex -I/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/tools/clang/include -Iinterpreter/llvm/src/tools/clang/include -I/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/slc7_ppc64le_gcc10/external/libxml2/2.9.10-32fb6ccc7a5c1482269c150e9287ec24/include/libxml2 -Iinterpreter/llvm/src/include -I/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/include -D__ROOFIT_NOBANNER -fdiagnostics-color=always -std=c++17 -Wno-implicit-fallthrough -Wno-noexcept-type -pipe  -Wshadow -Wall -W -Woverloaded-virtual -fsigned-char -pthread -fno-semantic-interposition  -fPIC -fvisibility-inlines-hidden -Werror=date-time -std=c++1z -w -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -fno-strict-aliasing -O3 -DNDEBUG -fvisibility=hidden -fvisibility-inlines-hidden  -fno-exceptions -fno-rtti -std=c++17 -MD -MT interpreter/llvm/src/tools/clang/lib/Lex/CMakeFiles/obj.clangLex.dir/PPCaching.cpp.o -MF interpreter/llvm/src/tools/clang/lib/Lex/CMakeFiles/obj.clangLex.dir/PPCaching.cpp.o.d -o interpreter/llvm/src/tools/clang/lib/Lex/CMakeFiles/obj.clangLex.dir/PPCaching.cpp.o -c /scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/tools/clang/lib/Lex/PPCaching.cpp
[6494/9540] /scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/slc7_ppc64le_gcc10/external/gcc/10.3.0-84898dea653199466402e67d73657f10/bin/g++ -DGTEST_HAS_RTTI=0 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Iinterpreter/llvm/src/tools/clang/lib/Lex -I/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/tools/clang/lib/Lex -I/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/tools/clang/include -Iinterpreter/llvm/src/tools/clang/include -I/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/slc7_ppc64le_gcc10/external/libxml2/2.9.10-32fb6ccc7a5c1482269c150e9287ec24/include/libxml2 -Iinterpreter/llvm/src/include -I/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/include -D__ROOFIT_NOBANNER -fdiagnostics-color=always -std=c++17 -Wno-implicit-fallthrough -Wno-noexcept-type -pipe  -Wshadow -Wall -W -Woverloaded-virtual -fsigned-char -pthread -fno-semantic-interposition  -fPIC -fvisibility-inlines-hidden -Werror=date-time -std=c++1z -w -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -fno-strict-aliasing -O3 -DNDEBUG -fvisibility=hidden -fvisibility-inlines-hidden  -fno-exceptions -fno-rtti -std=c++17 -MD -MT interpreter/llvm/src/tools/clang/lib/Lex/CMakeFiles/obj.clangLex.dir/Lexer.cpp.o -MF interpreter/llvm/src/tools/clang/lib/Lex/CMakeFiles/obj.clangLex.dir/Lexer.cpp.o.d -o interpreter/llvm/src/tools/clang/lib/Lex/CMakeFiles/obj.clangLex.dir/Lexer.cpp.o -c /scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/tools/clang/lib/Lex/Lexer.cpp
/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/tools/clang/lib/Lex/Lexer.cpp: In member function 'bool clang::Lexer::SkipBlockComment(clang::Token&, const char*, bool&)':
/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/tools/clang/lib/Lex/Lexer.cpp:2549:34: error: ISO C++ forbids declaration of 'type name' with no type [-fpermissive]
 2549 |              !vec_any_eq(*(const vector unsigned char*)CurPtr, Slashes))
      |                                  ^~~~~~
/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/tools/clang/lib/Lex/Lexer.cpp:2549:28: error: expected primary-expression before 'const'
 2549 |              !vec_any_eq(*(const vector unsigned char*)CurPtr, Slashes))
      |                            ^~~~~
/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/tools/clang/lib/Lex/Lexer.cpp:2549:28: error: expected ')' before 'const'
/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/tools/clang/lib/Lex/Lexer.cpp:2550:21: error: expected ')' before ';' token
 2550 |         CurPtr += 16;
      |                     ^
      |                     )
In file included from /scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/tools/clang/lib/Lex/Lexer.cpp:2469:
/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/tools/clang/lib/Lex/Lexer.cpp:2549:15: note: to match this '('
 2549 |              !vec_any_eq(*(const vector unsigned char*)CurPtr, Slashes))
      |               ^~~~~~~~~~
/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/tools/clang/lib/Lex/Lexer.cpp:2550:21: error: expected ')' before ';' token
 2550 |         CurPtr += 16;
      |                     ^
      |                     )
/scratch/cmsbuild/jenkins_b/workspace/ib-run-pr-tests/testBuildDir/BUILD/slc7_ppc64le_gcc10/lcg/root/6.24.07-12a11ac5dbf21d7c2a6a8cef92c99bc0/root-6.24.07/interpreter/llvm/src/tools/clang/lib/Lex/Lexer.cpp:2548:13: note: to match this '('
 2548 |       while (CurPtr+16 <= BufferEnd &&
      |             ^

[hahnjo]

llvm/llvm-project@3185c30, I will apply the patch to our LLVM 9 and backport to 6.24

[hahnjo]

Oh, already there in 01e3a90. #9426 backports it to 6.24, sorry for missing this so far.

[hahnjo]

Barely missed the 30 minutes, damn 😅

[smuzaffar]

thanks @hahnjo , this indeed fixed the ppc64le GCC 11 build issues