Add support for illumos cross-compilation (#37753)

4 files changed, 36 insertions, 7 deletions

diff --git a/eng/native/configurecompiler.cmake b/eng/native/configurecompiler.cmake
index a6e6ba45808..a6537bbd9a6 100644
--- a/eng/native/configurecompiler.cmake
+++ b/eng/native/configurecompiler.cmake
@@ -577,4 +577,18 @@ else (CLR_CMAKE_HOST_WIN32)
     if (AWK STREQUAL "AWK-NOTFOUND")
         message(FATAL_ERROR "AWK not found")
     endif()
+
+    # detect linker
+    set(ldVersion ${CMAKE_C_COMPILER};-Wl,--version)
+    execute_process(COMMAND ${ldVersion}
+        ERROR_QUIET
+        OUTPUT_VARIABLE ldVersionOutput)
+
+    if("${ldVersionOutput}" MATCHES "GNU ld" OR "${ldVersionOutput}" MATCHES "GNU gold")
+        set(LD_GNU 1)
+    elseif("${ldVersionOutput}" MATCHES "Solaris Link")
+        set(LD_SOLARIS 1)
+    else(CLR_CMAKE_HOST_OSX)
+        set(LD_OSX 1)
+    endif()
 endif(CLR_CMAKE_HOST_WIN32)
diff --git a/eng/native/configureplatform.cmake b/eng/native/configureplatform.cmake
index bbc7877e8f9..8c4ddff8d23 100644
--- a/eng/native/configureplatform.cmake
+++ b/eng/native/configureplatform.cmake
@@ -152,7 +152,7 @@ if(CLR_CMAKE_HOST_OS STREQUAL SunOS)
         COMMAND isainfo -n
         OUTPUT_VARIABLE SUNOS_NATIVE_INSTRUCTION_SET)
 
-    if(SUNOS_NATIVE_INSTRUCTION_SET MATCHES "amd64")
+    if(SUNOS_NATIVE_INSTRUCTION_SET MATCHES "amd64" OR CMAKE_CROSSCOMPILING)
         set(CLR_CMAKE_HOST_UNIX_AMD64 1)
         set(CMAKE_SYSTEM_PROCESSOR "amd64")
     else()
@@ -165,11 +165,11 @@ if(CLR_CMAKE_HOST_OS STREQUAL SunOS)
         ERROR_QUIET)
 
     set(CLR_CMAKE_HOST_SUNOS 1)
-    if(SUNOS_KERNEL_KIND STREQUAL illumos)
+    if(SUNOS_KERNEL_KIND STREQUAL illumos OR CMAKE_CROSSCOMPILING)
         set(CLR_CMAKE_HOST_OS_ILLUMOS 1)
-    else(SUNOS_KERNEL_KIND STREQUAL illumos)
+    else(SUNOS_KERNEL_KIND STREQUAL illumos OR CMAKE_CROSSCOMPILING)
         set(CLR_CMAKE_HOST_OS_SOLARIS 1)
-    endif(SUNOS_KERNEL_KIND STREQUAL illumos)
+    endif(SUNOS_KERNEL_KIND STREQUAL illumos OR CMAKE_CROSSCOMPILING)
 endif(CLR_CMAKE_HOST_OS STREQUAL SunOS)
 
 if(CLR_CMAKE_HOST_OS STREQUAL Windows)
diff --git a/eng/native/configuretools.cmake b/eng/native/configuretools.cmake
index 4fb94531d76..0edbe2ee6d0 100644
--- a/eng/native/configuretools.cmake
+++ b/eng/native/configuretools.cmake
@@ -34,17 +34,18 @@ if(NOT WIN32 AND NOT CLR_CMAKE_TARGET_BROWSER)
       "${TOOLSET_PREFIX}${exec}")
 
     if (EXEC_LOCATION_${exec} STREQUAL "EXEC_LOCATION_${exec}-NOTFOUND")
-      message(FATAL_ERROR "Unable to find toolchain executable for: ${exec}.")
+      message(FATAL_ERROR "Unable to find toolchain executable. Name: ${exec}, Prefix: ${TOOLSET_PREFIX}.")
     endif()
     set(${var} ${EXEC_LOCATION_${exec}} PARENT_SCOPE)
   endfunction()
 
   locate_toolchain_exec(ar CMAKE_AR)
-  locate_toolchain_exec(link CMAKE_LINKER)
   locate_toolchain_exec(nm CMAKE_NM)
 
-  if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
+  if(CMAKE_C_COMPILER_ID MATCHES "GNU")
     locate_toolchain_exec(ranlib CMAKE_RANLIB)
+  else()
+    locate_toolchain_exec(link CMAKE_LINKER)
   endif()
 
   if(NOT CLR_CMAKE_TARGET_OSX AND NOT CLR_CMAKE_TARGET_IOS AND NOT CLR_CMAKE_TARGET_TVOS AND (NOT CLR_CMAKE_TARGET_ANDROID OR CROSS_ROOTFS))
diff --git a/eng/native/functions.cmake b/eng/native/functions.cmake
index 49b0064499e..44790724ea0 100644
--- a/eng/native/functions.cmake
+++ b/eng/native/functions.cmake
@@ -162,6 +162,20 @@ function(preprocess_compile_asm)
   set(${COMPILE_ASM_OUTPUT_OBJECTS} ${ASSEMBLED_OBJECTS} PARENT_SCOPE)
 endfunction()
 
+function(set_exports_linker_option exports_filename)
+    if(LD_GNU OR LD_SOLARIS)
+        # Add linker exports file option
+        if(LD_SOLARIS)
+            set(EXPORTS_LINKER_OPTION -Wl,-M,${exports_filename} PARENT_SCOPE)
+        else()
+            set(EXPORTS_LINKER_OPTION -Wl,--version-script=${exports_filename} PARENT_SCOPE)
+        endif()
+    elseif(LD_OSX)
+        # Add linker exports file option
+        set(EXPORTS_LINKER_OPTION -Wl,-exported_symbols_list,${exports_filename} PARENT_SCOPE)
+    endif()
+endfunction()
+
 function(generate_exports_file)
   set(INPUT_LIST ${ARGN})
   list(GET INPUT_LIST -1 outputFilename)