commit 3a162c3ae8d86d3e7a2573dc9ade28c58907f0ca
author Rainer Orth <ro@gcc.gnu.org> Thu Aug 27 10:59:51 2020 +0200
committer Copybara-Service <copybara-worker@google.com> Thu Sep 03 18:12:38 2020 -0700
tree 0e5bbf98bb4fae33b335c9b156c910f6095e1e69
parent af40624f1ea4b4820950517fc646c0320dbd8e82

[polly][cmake] Don't build LLVMPolly.so without PIC

A build on `sparcv9-sun-solaris2.11` with `-DLLVM_ENABLE_PIC=Off` failed
linking `LLVMPolly.so`:

  [2277/2297] Linking CXX shared module lib/LLVMPolly.so
  FAILED: lib/LLVMPolly.so
  [...]
  ld: fatal: relocation error: R_SPARC_H44: file tools/polly/lib/CMakeFiles/obj.Polly.dir/Analysis/DependenceInfo.cpp.o: symbol .data._ZL16__gthread_active (section): invalid shared object relocation type: ABS44 code model unsupported
  [...]

As on many other targets, one cannot link non-PIC objects into a shared
object on Solaris/sparcv9.

The following patch avoids this by not building the library without PIC.
It allowed the build to finish.

Differential Revision: https://reviews.llvm.org/D85627

GitOrigin-RevId: 26d659bbe08028c0e04ddc3f4c698a995f41a131