[SystemZ] Allow configuring default CLANG_SYSTEMZ_ARCH

On Ubuntu, we want to raise default CLANG_SYSTEMZ_ARCH to z13,
thus allow configuring this via CMake.
On Debian, we want to raise it to z196.

Author: Dimitri John Ledkov
Differential Revision: https://reviews.llvm.org/D75914

diff --git a/clang/CMakeLists.txt b/clang/CMakeLists.txt
index 7809d65..c9e76c5 100644 (file)
--- a/clang/CMakeLists.txt
+++ b/clang/CMakeLists.txt
@@ -306,6 +306,10 @@ if (NOT DEFINED MATCHED_ARCH OR "${CMAKE_MATCH_1}" LESS 35)
     "Default architecture for OpenMP offloading to Nvidia GPUs." FORCE)
 endif()
 
+set(CLANG_SYSTEMZ_DEFAULT_ARCH "z10" CACHE STRING
+  "SystemZ Default Arch")
+add_definitions( -DCLANG_SYSTEMZ_DEFAULT_ARCH="${CLANG_SYSTEMZ_DEFAULT_ARCH}")
+
 set(CLANG_VENDOR ${PACKAGE_VENDOR} CACHE STRING
   "Vendor-specific text for showing with version information.")
 

diff --git a/clang/lib/Driver/ToolChains/Arch/SystemZ.cpp b/clang/lib/Driver/ToolChains/Arch/SystemZ.cpp
index 4d87110..b263fb7 100644 (file)
--- a/clang/lib/Driver/ToolChains/Arch/SystemZ.cpp
+++ b/clang/lib/Driver/ToolChains/Arch/SystemZ.cpp
@@ -47,7 +47,7 @@ std::string systemz::getSystemZTargetCPU(const ArgList &Args) {
 
     return std::string(CPUName);
   }
-  return "z10";
+  return CLANG_SYSTEMZ_DEFAULT_ARCH;
 }
 
 void systemz::getSystemZTargetFeatures(const Driver &D, const ArgList &Args,