[libc-commits] [libc] [libc] Support configurable errno modes (PR #98287)

Sat Jul 13 10:55:00 PDT 2024

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `libc-x86_64-debian` running on `libc-x86_64-debian` while building `libc` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/43/builds/2045

Here is the relevant piece of the build log for the reference:
```
Step 4 (annotate) failure: 'python ../llvm-zorg/zorg/buildbot/builders/annotated/libc-linux.py ...' (failure)
...
-- Performing Test HAVE_GNU_POSIX_REGEX -- failed to compile
-- Performing Test HAVE_POSIX_REGEX -- success
-- Performing Test HAVE_STEADY_CLOCK -- success
-- Performing Test HAVE_PTHREAD_AFFINITY -- success
-- Configuring done
-- Generating done
-- Build files have been written to: /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian/libc-x86_64-debian/build
@@@BUILD_STEP build libc@@@
Running: ninja libc
[1/363] Building CXX object projects/libc/src/errno/CMakeFiles/libc.src.errno.errno.dir/libc_errno.cpp.o
FAILED: projects/libc/src/errno/CMakeFiles/libc.src.errno.errno.dir/libc_errno.cpp.o 
/usr/bin/clang++ -DLIBC_NAMESPACE=__llvm_libc_19_0_0_git -I/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian/libc-x86_64-debian/build/projects/libc/src/errno -I/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian/libc-x86_64-debian/llvm-project/libc/src/errno -I/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian/libc-x86_64-debian/llvm-project/libc -isystem /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian/libc-x86_64-debian/build/projects/libc/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -fpie -fno-builtin -fno-exceptions -fno-lax-vector-conversions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-rtti -ftrivial-auto-var-init=pattern -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -Wall -Wextra -Werror -Wconversion -Wno-sign-conversion -Wimplicit-fallthrough -Wwrite-strings -Wextra-semi -Wnewline-eof -Wnonportable-system-include-path -Wstrict-prototypes -Wthread-safety -Wglobal-constructors -DLIBC_COPT_PUBLIC_PACKAGING -std=c++17 -MD -MT projects/libc/src/errno/CMakeFiles/libc.src.errno.errno.dir/libc_errno.cpp.o -MF projects/libc/src/errno/CMakeFiles/libc.src.errno.errno.dir/libc_errno.cpp.o.d -o projects/libc/src/errno/CMakeFiles/libc.src.errno.errno.dir/libc_errno.cpp.o -c /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian/libc-x86_64-debian/llvm-project/libc/src/errno/libc_errno.cpp
/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian/libc-x86_64-debian/llvm-project/libc/src/errno/libc_errno.cpp:91:32: error: use of undeclared identifier 'errno'
void Errno::operator=(int a) { errno = a; }
                               ^
/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian/libc-x86_64-debian/llvm-project/libc/src/errno/libc_errno.cpp:92:32: error: use of undeclared identifier 'errno'
Errno::operator int() { return errno; }
                               ^
2 errors generated.
[2/363] Building CXX object projects/libc/src/__support/OSUtil/linux/CMakeFiles/libc.src.__support.OSUtil.linux.linux_util.dir/fcntl.cpp.o
[3/363] Building CXX object projects/libc/src/inttypes/CMakeFiles/libc.src.inttypes.strtoimax.dir/strtoimax.cpp.o
[4/363] Building CXX object projects/libc/src/inttypes/CMakeFiles/libc.src.inttypes.strtoumax.dir/strtoumax.cpp.o
[5/363] Building CXX object projects/libc/src/__support/File/linux/CMakeFiles/libc.src.__support.File.linux.file.dir/file.cpp.o
[6/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.fesetexceptflag.dir/fesetexceptflag.cpp.o
[7/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.feclearexcept.dir/feclearexcept.cpp.o
[8/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.fedisableexcept.dir/fedisableexcept.cpp.o
[9/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.fesetexcept.dir/fesetexcept.cpp.o
[10/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.fesetround.dir/fesetround.cpp.o
[11/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.fegetexceptflag.dir/fegetexceptflag.cpp.o
[12/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.feupdateenv.dir/feupdateenv.cpp.o
[13/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.feholdexcept.dir/feholdexcept.cpp.o
[14/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.fetestexceptflag.dir/fetestexceptflag.cpp.o
[15/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.fetestexcept.dir/fetestexcept.cpp.o
[16/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.fegetexcept.dir/fegetexcept.cpp.o
[17/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.fegetenv.dir/fegetenv.cpp.o
[18/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.feenableexcept.dir/feenableexcept.cpp.o
[19/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.fegetround.dir/fegetround.cpp.o
[20/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.feraiseexcept.dir/feraiseexcept.cpp.o
[21/363] Building CXX object projects/libc/src/__support/File/CMakeFiles/libc.src.__support.File.file.dir/file.cpp.o
[22/363] Building CXX object projects/libc/src/fenv/CMakeFiles/libc.src.fenv.fesetenv.dir/fesetenv.cpp.o
[23/363] Building CXX object projects/libc/src/math/generic/CMakeFiles/libc.src.math.generic.ceilf128.dir/ceilf128.cpp.o
[24/363] Building CXX object projects/libc/src/math/generic/CMakeFiles/libc.src.math.generic.ceil.dir/ceil.cpp.o
[25/363] Building CXX object projects/libc/src/math/generic/CMakeFiles/libc.src.math.generic.canonicalize.dir/canonicalize.cpp.o
[26/363] Building CXX object projects/libc/src/math/generic/CMakeFiles/libc.src.math.generic.canonicalizef128.dir/canonicalizef128.cpp.o
[27/363] Building CXX object projects/libc/src/math/generic/CMakeFiles/libc.src.math.generic.canonicalizef.dir/canonicalizef.cpp.o
[28/363] Building CXX object projects/libc/src/math/generic/CMakeFiles/libc.src.math.generic.ceilf.dir/ceilf.cpp.o
[29/363] Building CXX object projects/libc/src/math/generic/CMakeFiles/libc.src.math.generic.ceill.dir/ceill.cpp.o
[30/363] Building CXX object projects/libc/src/math/generic/CMakeFiles/libc.src.math.generic.canonicalizel.dir/canonicalizel.cpp.o
[31/363] Building CXX object projects/libc/src/math/generic/CMakeFiles/libc.src.math.generic.cospif.dir/cospif.cpp.o

```

https://github.com/llvm/llvm-project/pull/98287