Errors while build coreclr on a Azure Linux Ubuntu VM

[saurabh500]

I am using a Azure VM for running some corefx tests.
To run the tests, I need to build the coreclr for Linux by using ./build.sh Release in the CoreClr git clone.

However when I build it, I get the following error after which the build hangs

[ 4%] Building CXX object src/pal/src/CMakeFiles/coreclrpal.dir/synchmgr/synchcontrollers.cpp.o
[ 4%] Building CXX object src/pal/src/CMakeFiles/coreclrpal.dir/synchmgr/synchmanager.cpp.o
[ 4%] Building CXX object src/pal/src/CMakeFiles/coreclrpal.dir/synchmgr/wait.cpp.o
[ 4%] Building CXX object src/pal/src/CMakeFiles/coreclrpal.dir/thread/context.cpp.o
/home/local/REDMOND/sausing/coreclr/src/pal/src/thread/context.cpp:1289:5: error: use of undeclared identifier
'__builtin___clear_cache'
__builtin___clear_cache((char )lpBaseAddress, (char *)((INT_PTR)lpBaseAddress + dwSize));
^
1 error generated.
make[2]: ** [src/pal/src/CMakeFiles/coreclrpal.dir/thread/context.cpp.o] Error 1
make[1]: *** [src/pal/src/CMakeFiles/coreclrpal.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....

The details of the kernel
Linux hotname-linux 3.19.0-31-generic dotnet/coreclr#36~14.04.1-Ubuntu SMP Thu Oct 8 10:21:08 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

I can build coreclr on another Ubuntu baremetal installation.

[sergiy-k]

Hi @saurabh500, are you still hitting this issue?

[saurabh500]

@sergiy-k I am not facing this anymore

Based on my comments on dotnet/coreclr#2130
I checked the VM clang version. It was v 3.4
I have upgraded to v3.5 and I can build coreclr successfully now.

[sergiy-k]

Thank you!