GHS: Add Compiler ID detection

-- Detect GHS compiler and version
   Detect ARCHITECTURE_ID for PPC / ARM / 86 targets
   Detect PLATFORM_ID for Integrity and Integrity178 platforms
   Using defines specified in the documents for the compilers: 201416 PPC / 201754 ARM / 201714 86
-- Fallback C/CXX compiler ID to GHS if not otherwise detected and using GHS MULTI generator
   Works around issue with some GHS compilers not setting __ghs__ compiler define
-- Tweak Compiler ID checking so major id of 002017 is not replaced with 217
-- Prefer try_compile() library targets when testing for working GHS compilers
-- Avoid CMake errors if reading past end of file for checking if file is PE executable

1 files changed, 64 insertions, 21 deletions

diff --git a/Modules/CMakeDetermineCompilerId.cmake b/Modules/CMakeDetermineCompilerId.cmake
index f987d9a..2a0dbd3 100644
--- a/Modules/CMakeDetermineCompilerId.cmake
+++ b/Modules/CMakeDetermineCompilerId.cmake
@@ -52,6 +52,13 @@ function(CMAKE_DETERMINE_COMPILER_ID lang flagvar src)
     endforeach()
   endif()
 
+  # If the compiler is still unknown, fallback to GHS
+  if(NOT CMAKE_${lang}_COMPILER_ID  AND "${CMAKE_GENERATOR}" MATCHES "Green Hills MULTI")
+    set(CMAKE_${lang}_COMPILER_ID GHS)
+    file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
+        "The ${lang} compiler identification is falling back to GHS.\n\n")
+  endif()
+
   # CUDA < 7.5 is missing version macros
   if(lang STREQUAL "CUDA"
      AND CMAKE_${lang}_COMPILER_ID STREQUAL "NVIDIA"
@@ -391,6 +398,40 @@ Id flags: ${testflags} ${CMAKE_${lang}_COMPILER_ID_FLAGS_ALWAYS}
       separate_arguments(CMAKE_${lang}_XCODE_ARCHS)
       set(CMAKE_${lang}_XCODE_ARCHS "${CMAKE_${lang}_XCODE_ARCHS}" PARENT_SCOPE)
     endif()
+  elseif("${CMAKE_GENERATOR}" MATCHES "Green Hills MULTI")
+    set(id_dir ${CMAKE_${lang}_COMPILER_ID_DIR})
+    set(id_src "${src}")
+    if (GHS_PRIMARY_TARGET)
+      set(ghs_primary_target "${GHS_PRIMARY_TARGET}")
+    else()
+      set(ghs_primary_target "${CMAKE_GENERATOR_PLATFORM}_${GHS_TARGET_PLATFORM}.tgt")
+    endif()
+    if ("${GHS_TARGET_PLATFORM}" MATCHES "integrity")
+        set(bsp_name "macro GHS_BSP=${GHS_BSP_NAME}")
+        set(os_dir "macro GHS_OS=${GHS_OS_DIR}")
+    endif()
+    set(command "${CMAKE_MAKE_PROGRAM}" "-commands" "-top" "GHS_default.gpj")
+    configure_file(${CMAKE_ROOT}/Modules/CompilerId/GHS_default.gpj.in
+      ${id_dir}/GHS_default.gpj @ONLY)
+    configure_file(${CMAKE_ROOT}/Modules/CompilerId/GHS_lib.gpj.in
+      ${id_dir}/GHS_lib.gpj @ONLY)
+    execute_process(COMMAND ${command}
+      WORKING_DIRECTORY ${id_dir}
+      OUTPUT_VARIABLE CMAKE_${lang}_COMPILER_ID_OUTPUT
+      ERROR_VARIABLE CMAKE_${lang}_COMPILER_ID_OUTPUT
+      RESULT_VARIABLE CMAKE_${lang}_COMPILER_ID_RESULT
+      )
+    # Match the compiler location line printed out.
+    set(ghs_toolpath "${CMAKE_MAKE_PROGRAM}")
+    string(REPLACE "/gbuild.exe" "/" ghs_toolpath ${ghs_toolpath})
+    string(REPLACE / "\\\\" ghs_toolpath ${ghs_toolpath})
+    if("${CMAKE_${lang}_COMPILER_ID_OUTPUT}" MATCHES "(${ghs_toolpath}[^ ]*)")
+      set(_comp "${CMAKE_MATCH_1}.exe")
+      if(EXISTS "${_comp}")
+        file(TO_CMAKE_PATH "${_comp}" _comp)
+        set(CMAKE_${lang}_COMPILER_ID_TOOL "${_comp}" PARENT_SCOPE)
+      endif()
+    endif()
   else()
     execute_process(
       COMMAND "${CMAKE_${lang}_COMPILER}"
@@ -550,7 +591,7 @@ function(CMAKE_DETERMINE_COMPILER_ID_CHECK lang file)
         set(ARCHITECTURE_ID "${CMAKE_MATCH_1}")
       endif()
       if("${info}" MATCHES "INFO:compiler_version\\[([^]\"]*)\\]")
-        string(REGEX REPLACE "^0+([0-9])" "\\1" COMPILER_VERSION "${CMAKE_MATCH_1}")
+        string(REGEX REPLACE "^0+([0-9]+)" "\\1" COMPILER_VERSION "${CMAKE_MATCH_1}")
         string(REGEX REPLACE "\\.0+([0-9])" ".\\1" COMPILER_VERSION "${COMPILER_VERSION}")
       endif()
       if("${info}" MATCHES "INFO:compiler_version_internal\\[([^]\"]*)\\]")
@@ -602,26 +643,28 @@ function(CMAKE_DETERMINE_COMPILER_ID_CHECK lang file)
     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 ${peoffset} HEX)
-      if(peheader STREQUAL "50450000a201")
-        set(ARCHITECTURE_ID "SH3")
-      elseif(peheader STREQUAL "50450000a301")
-        set(ARCHITECTURE_ID "SH3DSP")
-      elseif(peheader STREQUAL "50450000a601")
-        set(ARCHITECTURE_ID "SH4")
-      elseif(peheader STREQUAL "50450000a801")
-        set(ARCHITECTURE_ID "SH5")
+      if(NOT peoffsethex STREQUAL "")
+        string(SUBSTRING "${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")
+        endif()
       endif()
     endif()