[runtimes] Add the libc project to the list of runtimes.

This is possible as the default libc build now works under runtimes build.

Differential Revision: https://reviews.llvm.org/D99101

Author: Siva Chandra

llvm/runtimes/CMakeLists.txt

@@ -7,7 +7,7 @@
 # build, see runtimes/CMakeLists.txt, except that we currently check whether
 # compiler-rt is being built to determine whether to first build builtins
 # or not so we need that information in this file as well.
-set(LLVM_ALL_RUNTIMES "compiler-rt;libcxx;libcxxabi;libunwind;openmp")
+set(LLVM_ALL_RUNTIMES "compiler-rt;libc;libcxx;libcxxabi;libunwind;openmp")
 set(LLVM_ENABLE_RUNTIMES "" CACHE STRING
   "Semicolon-separated list of runtimes to build (${LLVM_ALL_RUNTIMES}), or \"all\".")
 if(LLVM_ENABLE_RUNTIMES STREQUAL "all" )
@@ -166,6 +166,12 @@ endif()
 # for all variables that will apply to runtimes.
 foreach(entry ${runtimes})
   get_filename_component(projName ${entry} NAME)
+  if(projName STREQUAL "libc")
+    # For now, we will use the name "llvmlibc" for the libc project as it is
+    # not a full libc yet. Also, if we leave it as is, the "lib" prefix gets
+    # stripped below and the targets endup having the name "c", "check-c" etc.
+    set(projName "llvmlibc")
+  endif()
   string(REPLACE "-" "_" canon_name ${projName})
   string(TOUPPER ${canon_name} canon_name)
   list(APPEND prefixes ${canon_name})

runtimes/CMakeLists.txt

@@ -2,7 +2,7 @@
 cmake_minimum_required(VERSION 3.13.4)
 project(Runtimes C CXX ASM)
 
-set(LLVM_ALL_RUNTIMES "compiler-rt;libcxx;libcxxabi;libunwind;openmp")
+set(LLVM_ALL_RUNTIMES "compiler-rt;libc;libcxx;libcxxabi;libunwind;openmp")
 set(LLVM_ENABLE_RUNTIMES "" CACHE STRING
   "Semicolon-separated list of runtimes to build (${LLVM_ALL_RUNTIMES}), or \"all\".")
 if(LLVM_ENABLE_RUNTIMES STREQUAL "all" )