[llvm-bugs] [Bug 43386] New: Linux headers are a required but not tested dependency

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=43386

            Bug ID: 43386
           Summary: Linux headers are a required but not tested dependency
           Product: lldb
           Version: 9.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: All Bugs
          Assignee: lldb-dev at lists.llvm.org
          Reporter: eblot.ml at gmail.com
                CC: jdevlieghere at apple.com, llvm-bugs at lists.llvm.org

When building for arm-none-eabi target, from a Linux host, lldb requires the
linux headers file to successfully build.

While this extra dependency may or may not be useful for a baremetal (i.e.
non-Linux based) target, the CMake build infrastructure does not test for the
presence of such headers. This means the LLVM builds fails late in the build
process (file 3404 out of 4232 on my host).

As an enhancement, it would be nice to test for such header files during the
CMake build stage to avoid such a late failure.

Linux headers may not be installed by default on Docker containers, for
example.


FAILED:
tools/lldb/source/Plugins/Process/Linux/CMakeFiles/lldbPluginProcessLinux.dir/NativeProcessLinux.cpp.o
/usr/bin/c++  -DGTEST_HAS_RTTI=0 -DHAVE_ROUND -DLLDB_CONFIGURATION_RELEASE
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-Itools/lldb/source/Plugins/Process/Linux
-I/toolchain/llvm/lldb/source/Plugins/Process/Linux -Itools/lldb/source
-Itools/lldb/include -I/toolchain/llvm/lldb/include -Iinclude
-I/toolchain/llvm/llvm/include -I/usr/include/python3.7m
-I/toolchain/llvm/llvm/../clang/include -Itools/lldb/../clang/include
-I/toolchain/llvm/lldb/source/. -fPIC -fvisibility-inlines-hidden
-Werror=date-time -std=c++11 -Wall -Wextra -Wno-unused-parameter
-Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic
-Wno-long-long -Wimplicit-fallthrough -Wno-maybe-uninitialized
-Wno-class-memaccess -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment
-fdiagnostics-color -ffunction-sections -fdata-sections
-Wno-deprecated-declarations -Wno-unknown-pragmas -Wno-strict-aliasing
-Wno-deprecated-register -Wno-vla-extension -O3 -DNDEBUG    -fno-exceptions
-fno-rtti -MD -MT
tools/lldb/source/Plugins/Process/Linux/CMakeFiles/lldbPluginProcessLinux.dir/NativeProcessLinux.cpp.o
-MF
tools/lldb/source/Plugins/Process/Linux/CMakeFiles/lldbPluginProcessLinux.dir/NativeProcessLinux.cpp.o.d
-o
tools/lldb/source/Plugins/Process/Linux/CMakeFiles/lldbPluginProcessLinux.dir/NativeProcessLinux.cpp.o
-c /toolchain/llvm/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
In file included from
/toolchain/llvm/lldb/source/Plugins/Process/Linux/NativeProcessLinux.h:25,
                 from
/toolchain/llvm/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp:9:
/toolchain/llvm/lldb/source/Plugins/Process/Linux/ProcessorTrace.h:18:10: fatal
error: linux/perf_event.h: No such file or directory
 #include <linux/perf_event.h>
          ^~~~~~~~~~~~~~~~~~~~
compilation terminated.

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