[llvm-bugs] [Bug 45840] New: Unable to build test-suite on Windows because of POSIX dependency

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=45840

            Bug ID: 45840
           Summary: Unable to build test-suite on Windows because of POSIX
                    dependency
           Product: Test Suite
           Version: 10.0
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Programs Tests
          Assignee: unassignedbugs at nondot.org
          Reporter: dpetrov at accesssoftek.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 23464
  --> https://bugs.llvm.org/attachment.cgi?id=23464&action=edit
test-suite build output

Current test-suite documentation https://llvm.org/docs/TestSuiteGuide.html does
not describe setup process for Windows platforms, especially from the build
step. I have tryed to fix it going down through build logs in console but new
errors were appearing. It is unable to setup environment properly now.

Mainly the reason is that the main measurement source file
"..test-suite\tools\timeit.c" depends from POSIX includes like <sys/resource.h>

My suggestions would be to rewrite `timeit.c` in a cross-platform way.

Steps top reproduce:
1. Get test-suite from GitHub according to documentation
2. Run 
mkdir test-suite-build
cd test-suite-build
cmake \
 -DCMAKE_C_COMPILER=<full path to llvm build>/bin/clang.exe \
 -DTEST_SUITE_HOST_CC=<full path to llvm build>/bin/clang.exe \
 -DCMAKE_LINKER=<full path to llvm build>/bin/lld.exe \
 -C../test-suite/cmake/caches/O0.cmake
3. Run
ninja

Output (shortened):
../tools/timeit.c:15:10: fatal error: 'sys/signal.h' file not found
#include <sys/signal.h>
         ^~~~~~~~~~~~~~
1 error generated.

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