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57 Commits

Author SHA1 Message Date
Siva Chandra Reddy 453c85ff0f [libc] Add implementation of errno and define the other macros of errno.h. 
Reviewers: stanshebs, alexbrachet

Subscribers: mgorny, MaskRay, tschuett, libc-commits

Tags: #libc-project

Differential Revision: https://reviews.llvm.org/D71094
 2019-12-09 13:34:08 -08:00
Siva Chandra Reddy b47f9eb55d [libc] Add a TableGen based header generator. 
Summary:
* The Python header generator has been removed.
* Docs giving a highlevel overview of the header gen scheme have been
  added.

Reviewers: phosek, abrachet

Subscribers: mgorny, MaskRay, tschuett, libc-commits

Tags: #libc-project

Differential Revision: https://reviews.llvm.org/D70197
 2019-11-22 13:02:24 -08:00
Siva Chandra Reddy 9364107cf3 Illustrate a redirector using the example of round function from math.h. 
Setup demonstrated in this patch is only for ELF-ish platforms.

Also note:

1. Use of redirectors is a temporary scheme. They will be removed once
   LLVM-libc has implementations for the redirected functions.
2. Redirectors are optional. One can choose to not include them in the
   LLVM-libc build for their platform.
3. Even with redirectors used, we want to link to the system libc
   dynamically.

Reviewers: dlj, hfinkel, jakehehrlich, phosek, stanshebs, theraven, alexshap

Subscribers: mgorny, libc-commits

Tags: #libc-project

Differential Revision: https://reviews.llvm.org/D69020
 2019-11-01 11:06:12 -07:00
Siva Chandra c1157d1e77 [libc] Do not add unittests if LLVM_INCLUDE_TESTS is OFF. 
Reviewers: nathanchance

Subscribers: mgorny, tschuett, libc-commits

Tags: #libc-project

Differential Revision: https://reviews.llvm.org/D68726

llvm-svn: 374925
 2019-10-15 17:42:28 +00:00
Siva Chandra 7a6d98325c Use arrays on stack and avoid use of new and delete operators. 
Summary: Also fix an error found with LLVM_USE_SANITIZER=Address.

Reviewers: nelhage

Subscribers: libc-commits

Tags: #libc-project

Differential Revision: https://reviews.llvm.org/D68761

llvm-svn: 374374
 2019-10-10 16:06:21 +00:00
Siva Chandra 4380647e79 Add few docs and implementation of strcpy and strcat. 
Summary:
This patch illustrates some of the features like modularity we want
in the new libc. Few other ideas like different kinds of testing, redirectors
etc are not yet present.

Reviewers: dlj, hfinkel, theraven, jfb, alexshap, jdoerfert

Subscribers: mgorny, dexonsmith, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D67867

llvm-svn: 373764
 2019-10-04 17:30:54 +00:00
David L. Jones ec80f531ca Add a director, along with README.txt and LICENSE.txt, for libc. 
llvm-svn: 372036
 2019-09-16 21:39:08 +00:00