[PATCH] D142404: [docs] Prefer setting LLVM_HOST_TRIPLE instead of LLVM_DEFAULT_TARGET_TRIPLE and LLVM_TARGET_ARCH

[Martin Storsjö via Phabricator via llvm-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rGcb19e3b20d92: [docs] Prefer setting LLVM_HOST_TRIPLE instead of LLVM_DEFAULT_TARGET_TRIPLE… (authored by mstorsjo).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D142404/new/

https://reviews.llvm.org/D142404

Files:
  llvm/docs/HowToCrossCompileLLVM.rst


Index: llvm/docs/HowToCrossCompileLLVM.rst
===================================================================
--- llvm/docs/HowToCrossCompileLLVM.rst
+++ llvm/docs/HowToCrossCompileLLVM.rst
@@ -43,12 +43,16 @@
  * ``-DCMAKE_SYSTEM_NAME=<target-system>``
  * ``-DCMAKE_INSTALL_PREFIX=<install-dir>``
  * ``-DLLVM_NATIVE_TOOL_DIR=<path-to-host-bin>``
- * ``-DLLVM_DEFAULT_TARGET_TRIPLE=arm-linux-gnueabihf``
- * ``-DLLVM_TARGET_ARCH=ARM``
+ * ``-DLLVM_HOST_TRIPLE=arm-linux-gnueabihf``
  * ``-DLLVM_TARGETS_TO_BUILD=ARM``
 
 Note: ``CMAKE_CROSSCOMPILING`` is always set automatically when ``CMAKE_SYSTEM_NAME`` is set. Don't put ``-DCMAKE_CROSSCOMPILING=TRUE`` in your options.
 
+Also note that ``LLVM_HOST_TRIPLE`` specifies the triple of the system
+that the cross built LLVM is going to run on - the flag is named based
+on the autoconf build/host/target nomenclature. (This flag implicitly sets
+other defaults, such as ``LLVM_DEFAULT_TARGET_TRIPLE``.)
+
 If you're compiling with GCC, you can use architecture options for your target,
 and the compiler driver will detect everything that it needs:
 


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