llvm-project/clang
Fangrui Song 11cb39c5fc [X86][PPC] Support -mlong-double-64
-mlong-double-64 is supported on some ports of gcc (i386, x86_64, and ppc{32,64}).
On many other targets, there will be an error:

    error: unrecognized command line option '-mlong-double-64'

This patch makes the driver option -mlong-double-64 available for x86
and ppc. The CC1 option -mlong-double-64 is available on all targets for
users to test on unsupported targets.

LongDoubleSize is added as a VALUE_LANGOPT so that the option can be
shared with -mlong-double-128 when we support it in clang.

Also, make powerpc*-linux-musl default to use 64-bit long double. It is
currently the only supported ABI on musl and is also how people
configure powerpc*-linux-musl-gcc.

Reviewed By: rnk

Differential Revision: https://reviews.llvm.org/D64067

llvm-svn: 365412
2019-07-09 00:27:43 +00:00
..
INPUTS
bindings [clang][Tooling] Infer target and mode from argv[0] when using JSONCompilationDatabase 2019-06-26 07:39:03 +00:00
cmake cmake: Add CLANG_LINK_CLANG_DYLIB option 2019-07-03 22:45:55 +00:00
docs Treat the range of representable values of floating-point types as [-inf, +inf] not as [-max, +max]. 2019-07-06 21:05:52 +00:00
examples cmake: Add CLANG_LINK_CLANG_DYLIB option 2019-07-03 22:45:55 +00:00
include [X86][PPC] Support -mlong-double-64 2019-07-09 00:27:43 +00:00
lib [X86][PPC] Support -mlong-double-64 2019-07-09 00:27:43 +00:00
runtime [GWP-ASan] Mutex implementation [2]. 2019-05-30 19:45:32 +00:00
test [X86][PPC] Support -mlong-double-64 2019-07-09 00:27:43 +00:00
tools cmake: Add CLANG_LINK_CLANG_DYLIB option 2019-07-03 22:45:55 +00:00
unittests [Syntax] Introduce syntax trees 2019-07-08 17:25:02 +00:00
utils [analyzer] exploded-graph-rewriter: Implement a topology-only mode. 2019-07-08 23:54:14 +00:00
www [cxx2a] P1236R1: the validity of a left shift does not depend on the 2019-06-25 01:45:26 +00:00
.arcconfig
.clang-format
.clang-tidy Disable tidy checks with too many hits 2019-02-01 11:20:13 +00:00
.gitignore Adjust documentation for git migration. 2019-01-29 16:37:27 +00:00
CMakeLists.txt cmake: Add CLANG_LINK_CLANG_DYLIB option 2019-07-03 22:45:55 +00:00
CODE_OWNERS.TXT
INSTALL.txt
LICENSE.TXT Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
ModuleInfo.txt
NOTES.txt
README.txt [NFC] Test commit 2019-06-12 07:50:48 +00:00

README.txt

//===----------------------------------------------------------------------===//
// C Language Family Front-end
//===----------------------------------------------------------------------===//

Welcome to Clang.  This is a compiler front-end for the C family of languages
(C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM
compiler infrastructure project.

Unlike many other compiler frontends, Clang is useful for a number of things
beyond just compiling code: we intend for Clang to be host to a number of
different source-level tools.  One example of this is the Clang Static Analyzer.

If you're interested in more (including how to build Clang) it is best to read
the relevant web sites.  Here are some pointers:

Information on Clang:             http://clang.llvm.org/
Building and using Clang:         http://clang.llvm.org/get_started.html
Clang Static Analyzer:            http://clang-analyzer.llvm.org/
Information on the LLVM project:  http://llvm.org/

If you have questions or comments about Clang, a great place to discuss them is
on the Clang development mailing list:
  http://lists.llvm.org/mailman/listinfo/cfe-dev

If you find a bug in Clang, please file it in the LLVM bug tracker:
  http://llvm.org/bugs/