The return value of sys::getDefaultTargetTriple, which is derived from
-DLLVM_DEFAULT_TRIPLE, is used to construct tool names, default target,
and in the future also to control the search path directly; as such it
should be used textually, without interpretation by LLVM.
Normalization of this value may lead to unexpected results, for example
if we configure LLVM with -DLLVM_DEFAULT_TARGET_TRIPLE=x86_64-linux-gnu,
normalization will transform that value to x86_64--linux-gnu. Driver will
use that value to search for tools prefixed with x86_64--linux-gnu- which
may be confusing. This is also inconsistent with the behavior of the
--target flag which is taken as-is without any normalization and overrides
the value of LLVM_DEFAULT_TARGET_TRIPLE.
Users of sys::getDefaultTargetTriple already perform their own
normalization as needed, so this change shouldn't impact existing logic.
Differential Revision: https://reviews.llvm.org/D46910
llvm-svn: 332750
CMAKE_CL_64 will never be set when cross-compiling with clang-cl, since
CMake relies on an actual VS environment in order to determine it.
Instead, use the size of a void pointer to determine the bit width of
the host compiler (and therefore the host triple), which works for both
native and cross compilation.
Note that, with the impending advent of Windows on AArch64, assuming
that a 64-bit host == x86_64 isn't correct either, but that's something
to be addressed in a follow-up.
Differential Revision: https://reviews.llvm.org/D41155
llvm-svn: 320615
Summary:
The previous output was confusing as it would output "Taget triple:
x86_64-unknown-linux-gnu" even when LLVM_HOST_TRIPLE or
LLVM_DEFAULT_TARGET_TRIPLE were set on the CMake command line
Patch by: Alex Richardson!
Reviewers: beanz
Subscribers: Eugene.Zelenko
Differential Revision: https://reviews.llvm.org/D17067
llvm-svn: 282516
Summary:
This patch is provided in preparation for removing autoconf on 1/26. The proposal to remove autoconf on 1/26 was discussed on the llvm-dev thread here: http://lists.llvm.org/pipermail/llvm-dev/2016-January/093875.html
"I felt a great disturbance in the [build system], as if millions of [makefiles] suddenly cried out in terror and were suddenly silenced. I fear something [amazing] has happened."
- Obi Wan Kenobi
Reviewers: chandlerc, grosbach, bob.wilson, tstellarAMD, echristo, whitequark
Subscribers: chfast, simoncook, emaste, jholewinski, tberghammer, jfb, danalbert, srhines, arsenm, dschuff, jyknight, dsanders, joker.eph, llvm-commits
Differential Revision: http://reviews.llvm.org/D16471
llvm-svn: 258861
dealing in the host triple, be honest about it and document the decision
to default the target triple to the host triple unless overridden.
llvm-svn: 148822
Nico Weber