Compilers: Add paths from -print-sysroot to system prefix path

Modules/CMakeASMCompiler.cmake.in

@@ -12,6 +12,7 @@ set(CMAKE_ASM@ASM_DIALECT@_COMPILER_VERSION "@_CMAKE_ASM_COMPILER_VERSION@")
 set(CMAKE_ASM@ASM_DIALECT@_COMPILER_ENV_VAR "@_CMAKE_ASM_COMPILER_ENV_VAR@")
 @_SET_CMAKE_ASM_COMPILER_ID_VENDOR_MATCH@
 @_SET_CMAKE_ASM_COMPILER_ARCHITECTURE_ID@
+@_SET_CMAKE_ASM_COMPILER_SYSROOT@
 
 set(CMAKE_ASM@ASM_DIALECT@_IGNORE_EXTENSIONS h;H;o;O;obj;OBJ;def;DEF;rc;RC)
 set(CMAKE_ASM@ASM_DIALECT@_LINKER_PREFERENCE 0)

Modules/CMakeCCompiler.cmake.in

@@ -15,6 +15,7 @@ set(CMAKE_C_SIMULATE_ID "@CMAKE_C_SIMULATE_ID@")
 set(CMAKE_C_COMPILER_FRONTEND_VARIANT "@CMAKE_C_COMPILER_FRONTEND_VARIANT@")
 set(CMAKE_C_SIMULATE_VERSION "@CMAKE_C_SIMULATE_VERSION@")
 @_SET_CMAKE_C_COMPILER_ARCHITECTURE_ID@
+@_SET_CMAKE_C_COMPILER_SYSROOT@
 @SET_MSVC_C_ARCHITECTURE_ID@
 @SET_CMAKE_XCODE_ARCHS@
 set(CMAKE_AR "@CMAKE_AR@")

Modules/CMakeCUDACompiler.cmake.in

@@ -16,6 +16,7 @@ set(CMAKE_CUDA_SIMULATE_ID "@CMAKE_CUDA_SIMULATE_ID@")
 set(CMAKE_CUDA_COMPILER_FRONTEND_VARIANT "@CMAKE_CUDA_COMPILER_FRONTEND_VARIANT@")
 set(CMAKE_CUDA_SIMULATE_VERSION "@CMAKE_CUDA_SIMULATE_VERSION@")
 @SET_MSVC_CUDA_ARCHITECTURE_ID@
+@_SET_CMAKE_CUDA_COMPILER_SYSROOT@
 
 set(CMAKE_CUDA_COMPILER_ENV_VAR "CUDACXX")
 set(CMAKE_CUDA_HOST_COMPILER_ENV_VAR "CUDAHOSTCXX")

Modules/CMakeCXXCompiler.cmake.in

@@ -17,6 +17,7 @@ set(CMAKE_CXX_SIMULATE_ID "@CMAKE_CXX_SIMULATE_ID@")
 set(CMAKE_CXX_COMPILER_FRONTEND_VARIANT "@CMAKE_CXX_COMPILER_FRONTEND_VARIANT@")
 set(CMAKE_CXX_SIMULATE_VERSION "@CMAKE_CXX_SIMULATE_VERSION@")
 @_SET_CMAKE_CXX_COMPILER_ARCHITECTURE_ID@
+@_SET_CMAKE_CXX_COMPILER_SYSROOT@
 @SET_MSVC_CXX_ARCHITECTURE_ID@
 @SET_CMAKE_XCODE_ARCHS@
 set(CMAKE_AR "@CMAKE_AR@")

Modules/CMakeDetermineASMCompiler.cmake

@@ -134,6 +134,9 @@ if(NOT CMAKE_ASM${ASM_DIALECT}_COMPILER_ID)
       list(GET _all_compileid_matches "-1" CMAKE_ASM${ASM_DIALECT}_COMPILER_ARCHITECTURE_ID)
     endif()
   endif()
+
+  _cmake_find_compiler_sysroot(ASM${ASM_DIALECT})
+
   unset(CMAKE_ASM${ASM_DIALECT}_COMPILER_ID_OUTPUT)
   unset(_all_compileid_matches)
   unset(_compileid)
@@ -211,6 +214,14 @@ foreach(_var
   set(_CMAKE_ASM_${_var} "${CMAKE_ASM${ASM_DIALECT}_${_var}}")
 endforeach()
 
+if(CMAKE_ASM${ASM_DIALECT}_COMPILER_SYSROOT)
+  string(CONCAT _SET_CMAKE_ASM_COMPILER_SYSROOT
+    "set(CMAKE_ASM${ASM_DIALECT}_COMPILER_SYSROOT \"${CMAKE_ASM${ASM_DIALECT}_COMPILER_SYSROOT}\")\n"
+    "set(CMAKE_COMPILER_SYSROOT \"${CMAKE_ASM${ASM_DIALECT}_COMPILER_SYSROOT}\")")
+else()
+  set(_SET_CMAKE_ASM_COMPILER_SYSROOT "")
+endif()
+
 if(CMAKE_ASM${ASM_DIALECT}_COMPILER_ID_VENDOR_MATCH)
   set(_SET_CMAKE_ASM_COMPILER_ID_VENDOR_MATCH
     "set(CMAKE_ASM${ASM_DIALECT}_COMPILER_ID_VENDOR_MATCH [==[${CMAKE_ASM${ASM_DIALECT}_COMPILER_ID_VENDOR_MATCH}]==])")

Modules/CMakeDetermineCCompiler.cmake

@@ -115,6 +115,8 @@ if(NOT CMAKE_C_COMPILER_ID_RUN)
   include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
   CMAKE_DETERMINE_COMPILER_ID(C CFLAGS CMakeCCompilerId.c)
 
+  _cmake_find_compiler_sysroot(C)
+
   # Set old compiler and platform id variables.
   if(CMAKE_C_COMPILER_ID STREQUAL "GNU")
     set(CMAKE_COMPILER_IS_GNUCC 1)
@@ -191,6 +193,14 @@ include(CMakeFindBinUtils)
 include(Compiler/${CMAKE_C_COMPILER_ID}-FindBinUtils OPTIONAL)
 unset(_CMAKE_PROCESSING_LANGUAGE)
 
+if(CMAKE_C_COMPILER_SYSROOT)
+  string(CONCAT _SET_CMAKE_C_COMPILER_SYSROOT
+    "set(CMAKE_C_COMPILER_SYSROOT \"${CMAKE_C_COMPILER_SYSROOT}\")\n"
+    "set(CMAKE_COMPILER_SYSROOT \"${CMAKE_C_COMPILER_SYSROOT}\")")
+else()
+  set(_SET_CMAKE_C_COMPILER_SYSROOT "")
+endif()
+
 if(CMAKE_C_COMPILER_ARCHITECTURE_ID)
   set(_SET_CMAKE_C_COMPILER_ARCHITECTURE_ID
     "set(CMAKE_C_COMPILER_ARCHITECTURE_ID ${CMAKE_C_COMPILER_ARCHITECTURE_ID})")

Modules/CMakeDetermineCUDACompiler.cmake

@@ -70,6 +70,8 @@ if(NOT CMAKE_CUDA_COMPILER_ID_RUN)
 
   include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
   CMAKE_DETERMINE_COMPILER_ID(CUDA CUDAFLAGS CMakeCUDACompilerId.cu)
+
+  _cmake_find_compiler_sysroot(CUDA)
 endif()
 
 set(_CMAKE_PROCESSING_LANGUAGE "CUDA")
@@ -189,6 +191,14 @@ elseif(CMAKE_CUDA_COMPILER_ID STREQUAL "NVIDIA")
   endif()
 endif()
 
+if(CMAKE_CUDA_COMPILER_SYSROOT)
+  string(CONCAT _SET_CMAKE_CUDA_COMPILER_SYSROOT
+    "set(CMAKE_CUDA_COMPILER_SYSROOT \"${CMAKE_CUDA_COMPILER_SYSROOT}\")\n"
+    "set(CMAKE_COMPILER_SYSROOT \"${CMAKE_CUDA_COMPILER_SYSROOT}\")")
+else()
+  set(_SET_CMAKE_CUDA_COMPILER_SYSROOT "")
+endif()
+
 # Determine CMAKE_CUDA_TOOLKIT_INCLUDE_DIRECTORIES
 if(CMAKE_CUDA_COMPILER_ID STREQUAL "NVIDIA")
   set(CMAKE_CUDA_TOOLKIT_INCLUDE_DIRECTORIES)

Modules/CMakeDetermineCXXCompiler.cmake

@@ -110,6 +110,8 @@ if(NOT CMAKE_CXX_COMPILER_ID_RUN)
   include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
   CMAKE_DETERMINE_COMPILER_ID(CXX CXXFLAGS CMakeCXXCompilerId.cpp)
 
+  _cmake_find_compiler_sysroot(CXX)
+
   # Set old compiler and platform id variables.
   if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     set(CMAKE_COMPILER_IS_GNUCXX 1)
@@ -189,6 +191,14 @@ include(CMakeFindBinUtils)
 include(Compiler/${CMAKE_CXX_COMPILER_ID}-FindBinUtils OPTIONAL)
 unset(_CMAKE_PROCESSING_LANGUAGE)
 
+if(CMAKE_CXX_COMPILER_SYSROOT)
+  string(CONCAT _SET_CMAKE_CXX_COMPILER_SYSROOT
+    "set(CMAKE_CXX_COMPILER_SYSROOT \"${CMAKE_CXX_COMPILER_SYSROOT}\")\n"
+    "set(CMAKE_COMPILER_SYSROOT \"${CMAKE_CXX_COMPILER_SYSROOT}\")")
+else()
+  set(_SET_CMAKE_CXX_COMPILER_SYSROOT "")
+endif()
+
 if(CMAKE_CXX_COMPILER_ARCHITECTURE_ID)
   set(_SET_CMAKE_CXX_COMPILER_ARCHITECTURE_ID
     "set(CMAKE_CXX_COMPILER_ARCHITECTURE_ID ${CMAKE_CXX_COMPILER_ARCHITECTURE_ID})")

Modules/CMakeDetermineCompiler.cmake

@@ -118,3 +118,18 @@ macro(_cmake_find_compiler_path lang)
     endif()
   endif()
 endmacro()
+
+function(_cmake_find_compiler_sysroot lang)
+  if(CMAKE_${lang}_COMPILER_ID STREQUAL "GNU")
+    execute_process(COMMAND "${CMAKE_${lang}_COMPILER}" -print-sysroot
+      OUTPUT_STRIP_TRAILING_WHITESPACE
+      OUTPUT_VARIABLE _cmake_sysroot_run_out
+      ERROR_VARIABLE _cmake_sysroot_run_err)
+
+    if(_cmake_sysroot_run_out AND NOT _cmake_sysroot_run_err AND IS_DIRECTORY "${_cmake_sysroot_run_out}/usr")
+      set(CMAKE_${lang}_COMPILER_SYSROOT "${_cmake_sysroot_run_out}/usr" PARENT_SCOPE)
+    else()
+      set(CMAKE_${lang}_COMPILER_SYSROOT "" PARENT_SCOPE)
+    endif()
+  endif()
+endfunction()

Modules/CMakeDetermineFortranCompiler.cmake

@@ -186,6 +186,8 @@ if(NOT CMAKE_Fortran_COMPILER_ID_RUN)
   include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
   CMAKE_DETERMINE_COMPILER_ID(Fortran FFLAGS CMakeFortranCompilerId.F)
 
+  _cmake_find_compiler_sysroot(Fortran)
+
   # Fall back to old is-GNU test.
   if(NOT CMAKE_Fortran_COMPILER_ID)
     execute_process(COMMAND ${CMAKE_Fortran_COMPILER} ${CMAKE_Fortran_COMPILER_ID_FLAGS_LIST} -E "${CMAKE_ROOT}/Modules/CMakeTestGNU.c"
@@ -276,6 +278,14 @@ if(CMAKE_Fortran_XL_CPP)
     "set(CMAKE_Fortran_XL_CPP \"${CMAKE_Fortran_XL_CPP}\")")
 endif()
 
+if(CMAKE_Fortran_COMPILER_SYSROOT)
+  string(CONCAT _SET_CMAKE_Fortran_COMPILER_SYSROOT
+    "set(CMAKE_Fortran_COMPILER_SYSROOT \"${CMAKE_Fortran_COMPILER_SYSROOT}\")\n"
+    "set(CMAKE_COMPILER_SYSROOT \"${CMAKE_Fortran_COMPILER_SYSROOT}\")")
+else()
+  set(_SET_CMAKE_Fortran_COMPILER_SYSROOT "")
+endif()
+
 if(CMAKE_Fortran_COMPILER_ARCHITECTURE_ID)
   set(_SET_CMAKE_Fortran_COMPILER_ARCHITECTURE_ID
     "set(CMAKE_Fortran_COMPILER_ARCHITECTURE_ID ${CMAKE_Fortran_COMPILER_ARCHITECTURE_ID})")

Modules/CMakeFortranCompiler.cmake.in

@@ -8,6 +8,7 @@ set(CMAKE_Fortran_SIMULATE_ID "@CMAKE_Fortran_SIMULATE_ID@")
 set(CMAKE_Fortran_SIMULATE_VERSION "@CMAKE_Fortran_SIMULATE_VERSION@")
 @_SET_CMAKE_Fortran_XL_CPP@
 @_SET_CMAKE_Fortran_COMPILER_ARCHITECTURE_ID@
+@_SET_CMAKE_Fortran_COMPILER_SYSROOT@
 @SET_MSVC_Fortran_ARCHITECTURE_ID@
 set(CMAKE_AR "@CMAKE_AR@")
 set(CMAKE_Fortran_COMPILER_AR "@CMAKE_Fortran_COMPILER_AR@")

Modules/Platform/UnixPaths.cmake

@@ -86,6 +86,10 @@ set(_CMAKE_CUDA_IMPLICIT_INCLUDE_DIRECTORIES_INIT
 
 unset(_cmake_sysroot_compile)
 
+if(CMAKE_COMPILER_SYSROOT)
+  list(PREPEND CMAKE_SYSTEM_PREFIX_PATH "${CMAKE_COMPILER_SYSROOT}")
+endif()
+
 # Enable use of lib32 and lib64 search path variants by default.
 set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB32_PATHS TRUE)
 set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS TRUE)