Compilation issues with libsycl-fallback in libdevice

[Natrocx]

Items in libdevice seem to be missing standard c++ headers as indicated by the following message:

FAILED: lib/libsycl-glibc.o
cd /home/natrocx/apps/dpc++/llvm/build/tools/libdevice && /home/natrocx/apps/dpc++/llvm/build/bin/clang-12 -fsycl -c -Wno-sycl-strict -Wno-undefined-internal -sycl-std=2017 -fsycl-targets=spir64_x86_64-unknown-unknown-sycldevice,spir64_gen-unknown-unknown-sycldevice,spir64_fpga-unknown-unknown-sycldevice,spir64-unknown-unknown-sycldevice /home/natrocx/apps/dpc++/llvm/libdevice/glibc_wrapper.cpp -o /home/natrocx/apps/dpc++/llvm/build/lib/libsycl-glibc.o
In file included from /home/natrocx/apps/dpc++/llvm/libdevice/glibc_wrapper.cpp:9:
/home/natrocx/apps/dpc++/llvm/libdevice/wrapper.h:16:10: fatal error: 'cstddef' file not found
#include <cstddef>
         ^~~~~~~~~
1 error generated.

[9/49] Generating ../../lib/libsycl-fallback-cassert.o
FAILED: lib/libsycl-fallback-cassert.o
cd /home/natrocx/apps/dpc++/llvm/build/tools/libdevice && /home/natrocx/apps/dpc++/llvm/build/bin/clang-12 -fsycl -c -Wno-sycl-strict -Wno-undefined-internal -sycl-std=2017 -fsycl-targets=spir64_x86_64-unknown-unknown-sycldevice,spir64_gen-unknown-unknown-sycldevice,spir64_fpga-unknown-unknown-sycldevice,spir64-unknown-unknown-sycldevice /home/natrocx/apps/dpc++/llvm/libdevice/fallback-cassert.cpp -o /home/natrocx/apps/dpc++/llvm/build/lib/libsycl-fallback-cassert.o
In file included from /home/natrocx/apps/dpc++/llvm/libdevice/fallback-cassert.cpp:9:
/home/natrocx/apps/dpc++/llvm/libdevice/wrapper.h:16:10: fatal error: 'cstddef' file not found
#include <cstddef>
         ^~~~~~~~~
1 error generated.

[10/49] Generating ../../lib/libsycl-fallback-cassert.spv
FAILED: lib/libsycl-fallback-cassert.spv
cd /home/natrocx/apps/dpc++/llvm/build/tools/libdevice && /home/natrocx/apps/dpc++/llvm/build/bin/clang-12 -S -fsycl-device-only -fno-sycl-use-bitcode -Wno-sycl-strict -Wno-undefined-internal -sycl-std=2017 /home/natrocx/apps/dpc++/llvm/libdevice/fallback-cassert.cpp -o /home/natrocx/apps/dpc++/llvm/build/lib/libsycl-fallback-cassert.spv
In file included from /home/natrocx/apps/dpc++/llvm/libdevice/fallback-cassert.cpp:9:
/home/natrocx/apps/dpc++/llvm/libdevice/wrapper.h:16:10: fatal error: 'cstddef' file not found
#include <cstddef>
         ^~~~~~~~~
1 error generated.

[11/49] Generating ../../lib/libsycl-fallback-complex.spv
FAILED: lib/libsycl-fallback-complex.spv
cd /home/natrocx/apps/dpc++/llvm/build/tools/libdevice && /home/natrocx/apps/dpc++/llvm/build/bin/clang-12 -S -fsycl-device-only -fno-sycl-use-bitcode -Wno-sycl-strict -Wno-undefined-internal -sycl-std=2017 /home/natrocx/apps/dpc++/llvm/libdevice/fallback-complex.cpp -o /home/natrocx/apps/dpc++/llvm/build/lib/libsycl-fallback-complex.spv
/home/natrocx/apps/dpc++/llvm/libdevice/fallback-complex.cpp:13:10: fatal error: 'cmath' file not found
#include <cmath>
         ^~~~~~~
1 error generated.

[12/49] Generating ../../lib/libsycl-fallback-complex-fp64.o
FAILED: lib/libsycl-fallback-complex-fp64.o
cd /home/natrocx/apps/dpc++/llvm/build/tools/libdevice && /home/natrocx/apps/dpc++/llvm/build/bin/clang-12 -fsycl -c -Wno-sycl-strict -Wno-undefined-internal -sycl-std=2017 -fsycl-targets=spir64_x86_64-unknown-unknown-sycldevice,spir64_gen-unknown-unknown-sycldevice,spir64_fpga-unknown-unknown-sycldevice,spir64-unknown-unknown-sycldevice /home/natrocx/apps/dpc++/llvm/libdevice/fallback-complex-fp64.cpp -o /home/natrocx/apps/dpc++/llvm/build/lib/libsycl-fallback-complex-fp64.o
/home/natrocx/apps/dpc++/llvm/libdevice/fallback-complex-fp64.cpp:13:10: fatal error: 'cmath' file not found
#include <cmath>
         ^~~~~~~
1 error generated.

[13/49] Generating ../../lib/libsycl-fallback-complex.o
FAILED: lib/libsycl-fallback-complex.o
cd /home/natrocx/apps/dpc++/llvm/build/tools/libdevice && /home/natrocx/apps/dpc++/llvm/build/bin/clang-12 -fsycl -c -Wno-sycl-strict -Wno-undefined-internal -sycl-std=2017 -fsycl-targets=spir64_x86_64-unknown-unknown-sycldevice,spir64_gen-unknown-unknown-sycldevice,spir64_fpga-unknown-unknown-sycldevice,spir64-unknown-unknown-sycldevice /home/natrocx/apps/dpc++/llvm/libdevice/fallback-complex.cpp -o /home/natrocx/apps/dpc++/llvm/build/lib/libsycl-fallback-complex.o
/home/natrocx/apps/dpc++/llvm/libdevice/fallback-complex.cpp:13:10: fatal error: 'cmath' file not found
#include <cmath>
         ^~~~~~~
1 error generated.

[14/49] Generating ../../lib/libsycl-fallback-complex-fp64.spv
FAILED: lib/libsycl-fallback-complex-fp64.spv
cd /home/natrocx/apps/dpc++/llvm/build/tools/libdevice && /home/natrocx/apps/dpc++/llvm/build/bin/clang-12 -S -fsycl-device-only -fno-sycl-use-bitcode -Wno-sycl-strict -Wno-undefined-internal -sycl-std=2017 /home/natrocx/apps/dpc++/llvm/libdevice/fallback-complex-fp64.cpp -o /home/natrocx/apps/dpc++/llvm/build/lib/libsycl-fallback-complex-fp64.spv
/home/natrocx/apps/dpc++/llvm/libdevice/fallback-complex-fp64.cpp:13:10: fatal error: 'cmath' file not found
#include <cmath>
         ^~~~~~~
1 error generated.

This is a fresh build with gcc 8; building with clang or other versions fails before that.

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This issue is stale because it has been open 180 days with no activity. Remove stale label or comment or this will be automatically closed in 30 days.

[bader]

@Natrocx, sorry for the long delay.

Items in libdevice seem to be missing standard c++ headers as indicated by the following message:

Most likely it's caused by standard library configuration on the system. DPC++ detects the standard library installed on the system (usually libstdc++) and uses it to build SYCL code (i.e. libsycl-fallback in this case).

This is a fresh build with gcc 8;

Please, make sure that libstdc++ is installed as prescribed by GetStartedGuide.

Are you still seeing this issue?

[github-actions]

This issue is stale because it has been open 180 days with no activity. Remove stale label or comment or this will be automatically closed in 30 days.

[github-actions]

This issue was closed because it has been stalled for 30 days with no activity. Please, re-open if the issue still exists.