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build: don't attempt to run config.guess on Windows

When cross-compiling LLVM to android from Windows (for LLVMSupport), we would
attempt to execute `config.guess` to determine the host triple since
`CMAKE_SYSTEM_NAME` is not Windows and `CMAKE_C_COMPILER` will be set to GNU or
Clang.  This will fail as `config.guess` is a shell script which cannot be
executed on Windows.  Simply log a warning instead.  The user can specify the
value for this instead in those cases.

llvm-svn: 363420
This commit is contained in:
Saleem Abdulrasool 2019-06-14 16:47:04 +00:00
parent 8ac3784ab2
commit 16f4f43d09

View File

@ -15,16 +15,20 @@ function( get_host_triple var )
set( value "i686-pc-windows-gnu" )
endif()
else( MSVC )
set(config_guess ${LLVM_MAIN_SRC_DIR}/cmake/config.guess)
execute_process(COMMAND sh ${config_guess}
RESULT_VARIABLE TT_RV
OUTPUT_VARIABLE TT_OUT
OUTPUT_STRIP_TRAILING_WHITESPACE)
if( NOT TT_RV EQUAL 0 )
message(FATAL_ERROR "Failed to execute ${config_guess}")
endif( NOT TT_RV EQUAL 0 )
# Defer to dynamic detection of the host AIX version.
string(REGEX REPLACE "-aix[0-9][^-]*" "-aix" value ${TT_OUT})
if(CMAKE_HOST_SYSTEM_NAME STREQUAL Windows)
message(WARNING "unable to determine host target triple")
else()
set(config_guess ${LLVM_MAIN_SRC_DIR}/cmake/config.guess)
execute_process(COMMAND sh ${config_guess}
RESULT_VARIABLE TT_RV
OUTPUT_VARIABLE TT_OUT
OUTPUT_STRIP_TRAILING_WHITESPACE)
if( NOT TT_RV EQUAL 0 )
message(FATAL_ERROR "Failed to execute ${config_guess}")
endif( NOT TT_RV EQUAL 0 )
# Defer to dynamic detection of the host AIX version.
string(REGEX REPLACE "-aix[0-9][^-]*" "-aix" value ${TT_OUT})
endif()
endif( MSVC )
set( ${var} ${value} PARENT_SCOPE )
endfunction( get_host_triple var )