[libc-commits] [libc] [libc] Enable ifunc support in static startup (PR #182841)

[Schrodinger ZHU Yifan via libc-commits]

SchrodingerZhu wrote:

> LLVM Buildbot has detected a new failure on builder `libc-riscv32-qemu-yocto-fullbuild-dbg` running on `rv32gc-qemu-system` while building `libc` at step 4 "annotate".
> 
> Full details are available at: https://lab.llvm.org/buildbot/#/builders/196/builds/16178
> Here is the relevant piece of the build log for the reference

```
[1/2] Building CXX object libc/startup/linux/riscv/CMakeFiles/libc.startup.linux.riscv.irelative.dir/irelative.cpp.o
FAILED: libc/startup/linux/riscv/CMakeFiles/libc.startup.linux.riscv.irelative.dir/irelative.cpp.o 
/usr/local/bin/clang++ -DLIBC_NAMESPACE=__llvm_libc_21_0_0_git -D_DEBUG -I/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc -I/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/build/libc -isystem /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/build/libc/include -mabi=ilp32d -march=rv32imafdc --target=riscv32-unknown-linux-gnu --sysroot=/opt/riscv/sysroot --gcc-toolchain=/opt/riscv -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -Xclang -fno-pch-timestamp -g -std=gnu++17 --target=riscv32-unknown-linux-gnu -DLIBC_QSORT_IMPL=LIBC_QSORT_QUICK_SORT -DLIBC_COPT_STRING_LENGTH_IMPL=element -DLIBC_COPT_FIND_FIRST_CHARACTER_IMPL=element -DLIBC_ADD_NULL_CHECKS -DLIBC_ERRNO_MODE=LIBC_ERRNO_MODE_DEFAULT -DLIBC_THREAD_MODE=LIBC_THREAD_MODE_PLATFORM -DLIBC_CONF_WCTYPE_MODE=LIBC_WCTYPE_MODE_ASCII -DLIBC_COPT_RAW_MUTEX_DEFAULT_SPIN_COUNT=100 -fpie -ffreestanding -DLIBC_FULL_BUILD -nostdlibinc -idirafter=/usr/include -ffixed-point -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 -fstack-protector-strong -Wall -Wextra -Werror -Wconversion -Wno-sign-conversion -Wdeprecated -Wno-c99-extensions -Wno-gnu-imaginary-constant -Wno-pedantic -Wimplicit-fallthrough -Wwrite-strings -Wextra-semi -Wnewline-eof -Wnonportable-system-include-path -Wstrict-prototypes -Wthread-safety -Wglobal-constructors -fno-stack-protector -MD -MT libc/startup/linux/riscv/CMakeFiles/libc.startup.linux.riscv.irelative.dir/irelative.cpp.o -MF libc/startup/linux/riscv/CMakeFiles/libc.startup.linux.riscv.irelative.dir/irelative.cpp.o.d -o libc/startup/linux/riscv/CMakeFiles/libc.startup.linux.riscv.irelative.dir/irelative.cpp.o -c /home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/startup/linux/riscv/irelative.cpp
/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/startup/linux/riscv/irelative.cpp:19:8: error: unknown type name 'LIBC_INLINE'
   19 | static LIBC_INLINE constexpr unsigned get_r_type(uintptr_t info) {
      |        ^
1 error generated.
ninja: build stopped: subcommand failed.
```

It looks like a missing header problem

https://github.com/llvm/llvm-project/pull/182841