Commit bd827f98 authored by Patrick Gansterer's avatar Patrick Gansterer

WIN: Use COFF file header header for architecture detection (#14083)

Read the machine field from the COFF file header to get the exact
target architecture for ARM and SHx on the Windows platform.
parent 1768014d
......@@ -341,6 +341,35 @@ function(CMAKE_DETERMINE_COMPILER_ID_CHECK lang file)
endif()
endforeach()
# Detect the exact architecture from the PE header.
if(WIN32)
# The offset to the PE signature is stored at 0x3c.
file(READ ${file} peoffsethex LIMIT 1 OFFSET 60 HEX)
string(SUBSTRING "${peoffsethex}" 0 1 peoffsethex1)
string(SUBSTRING "${peoffsethex}" 1 1 peoffsethex2)
set(peoffsetexpression "${peoffsethex1} * 16 + ${peoffsethex2}")
string(REPLACE "a" "10" peoffsetexpression "${peoffsetexpression}")
string(REPLACE "b" "11" peoffsetexpression "${peoffsetexpression}")
string(REPLACE "c" "12" peoffsetexpression "${peoffsetexpression}")
string(REPLACE "d" "13" peoffsetexpression "${peoffsetexpression}")
string(REPLACE "e" "14" peoffsetexpression "${peoffsetexpression}")
string(REPLACE "f" "15" peoffsetexpression "${peoffsetexpression}")
math(EXPR peoffset "${peoffsetexpression}")
file(READ ${file} peheader LIMIT 6 OFFSET ${peoffset} HEX)
if(peheader STREQUAL "50450000a201")
set(ARCHITECTURE_ID "SH3")
elseif(peheader STREQUAL "50450000a301")
set(ARCHITECTURE_ID "SH3DSP")
elseif(peheader STREQUAL "50450000a601")
set(ARCHITECTURE_ID "SH4")
elseif(peheader STREQUAL "50450000a801")
set(ARCHITECTURE_ID "SH5")
elseif(peheader STREQUAL "50450000c201")
set(ARCHITECTURE_ID "THUMB")
endif()
endif()
# Check if a valid compiler and platform were found.
if(COMPILER_ID AND NOT COMPILER_ID_TWICE)
set(CMAKE_${lang}_COMPILER_ID "${COMPILER_ID}")
......
......@@ -171,13 +171,6 @@ set(_MACHINE_ARCH_FLAG ${MSVC_C_ARCHITECTURE_ID})
if(NOT _MACHINE_ARCH_FLAG)
set(_MACHINE_ARCH_FLAG ${MSVC_CXX_ARCHITECTURE_ID})
endif()
if(WINCE)
if(_MACHINE_ARCH_FLAG MATCHES "ARM")
set(_MACHINE_ARCH_FLAG "THUMB")
elseif(_MACHINE_ARCH_FLAG MATCHES "SH")
set(_MACHINE_ARCH_FLAG "SH4")
endif()
endif()
set (CMAKE_EXE_LINKER_FLAGS_INIT
"${CMAKE_EXE_LINKER_FLAGS_INIT} /machine:${_MACHINE_ARCH_FLAG}")
......
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