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[scudo] Skip building scudo standalone if sys/auxv.h can't be found 

Summary:
Since commit c299d1981d scudo
standalone can't be built without including sys/auxv.h.
I do not have that file on my system, and my builds have failed
when trying to simply build "all" runtimes. Assuming that "all"
means "all possible given the current environment" we need to
guard the setting of COMPILER_RT_HAS_SCUDO_STANDALONE=TRUE by
first checking if sys/auxv.h can be found.

Reviewers: pcc, cryptoad

Reviewed By: pcc

Subscribers: mgorny, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D73631
This commit is contained in:
Bjorn Pettersson 2020-01-29 17:19:26 +01:00
parent 33fa6727b7
commit f4ca2ac822
1 changed files with 6 additions and 1 deletions
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7
compiler-rt/cmake/config-ix.cmake
View File

@ -1,6 +1,7 @@
include(CMakePushCheckState)
include(CheckCCompilerFlag)
include(CheckCXXCompilerFlag)
include(CheckIncludeFiles)
include(CheckLibraryExists)
include(CheckSymbolExists)
include(TestBigEndian)
@ -116,6 +117,9 @@ check_cxx_compiler_flag(/wd4800 COMPILER_RT_HAS_WD4800_FLAG)
# Symbols.
check_symbol_exists(__func__ "" COMPILER_RT_HAS_FUNC_SYMBOL)
# Includes.
check_include_files("sys/auxv.h" COMPILER_RT_HAS_AUXV)
# Libraries.
check_library_exists(dl dlopen "" COMPILER_RT_HAS_LIBDL)
check_library_exists(rt shm_open "" COMPILER_RT_HAS_LIBRT)
@ -702,7 +706,8 @@ else()
endif()
#TODO(kostyak): add back Android & Fuchsia when the code settles a bit.
if (SCUDO_STANDALONE_SUPPORTED_ARCH AND OS_NAME MATCHES "Linux")
if (SCUDO_STANDALONE_SUPPORTED_ARCH AND OS_NAME MATCHES "Linux" AND
COMPILER_RT_HAS_AUXV)
set(COMPILER_RT_HAS_SCUDO_STANDALONE TRUE)
else()
set(COMPILER_RT_HAS_SCUDO_STANDALONE FALSE)