Commit d1f38ba6 authored by Brad King's avatar Brad King

CMakeDetermineCompilerId: Consider UTF-16 encodings of INFO strings

Our compiler identification source encodes `INFO:compiler[...]` and
similar strings in compiled objects or binaries that we then extract to
get information about the compiler.  With most compilers the strings are
encoded in the binaries as a simple byte sequence.  However, some
compilers use other encodings.  For example, the MS CSharp compiler uses
UTF-16LE and a TI compiler uses UTF-16BE.  Try each encoding.

Fixes: #19459
parent e1531442
......@@ -18,7 +18,6 @@ if(NOT CMAKE_CSharp_COMPILER_ID_RUN)
set(CMAKE_CSharp_COMPILER_ID_RUN 1)
# Try to identify the compiler.
set(CMAKE_CSharp_COMPILER_ID_STRINGS_PARAMETERS ENCODING UTF-16LE)
set(CMAKE_CSharp_COMPILER_ID)
include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
CMAKE_DETERMINE_COMPILER_ID(CSharp CSFLAGS CMakeCSharpCompilerId.cs)
......
......@@ -640,10 +640,14 @@ function(CMAKE_DETERMINE_COMPILER_ID_CHECK lang file)
set(ARCHITECTURE_ID)
set(SIMULATE_ID)
set(SIMULATE_VERSION)
file(STRINGS ${file}
CMAKE_${lang}_COMPILER_ID_STRINGS LIMIT_COUNT 38
${CMAKE_${lang}_COMPILER_ID_STRINGS_PARAMETERS}
REGEX ".?I.?N.?F.?O.?:.?[A-Za-z0-9_]+\\[[^]]*\\]")
foreach(encoding "" "ENCODING;UTF-16LE" "ENCODING;UTF-16BE")
file(STRINGS "${file}" CMAKE_${lang}_COMPILER_ID_STRINGS
LIMIT_COUNT 38 ${encoding}
REGEX ".?I.?N.?F.?O.?:.?[A-Za-z0-9_]+\\[[^]]*\\]")
if(NOT CMAKE_${lang}_COMPILER_ID_STRINGS STREQUAL "")
break()
endif()
endforeach()
set(COMPILER_ID_TWICE)
# With the IAR Compiler, some strings are found twice, first time as incomplete
# list like "?<Constant "INFO:compiler[IAR]">". Remove the incomplete copies.
......
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