diff --git a/.gitignore b/.gitignore
index 88165cf3073fd..bfe14adb6c041 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,10 +3,12 @@ syntax: glob
 ### VisualStudio ###
 
 # Tool Runtime Dir
-.dotnet/
-.dotnet-mono/
-.packages/
-.tools/
+# note: there is no trailing slash so if these are symlinks (which are seen as files,
+#       instead of directories), git will still ignore them.
+.dotnet
+.dotnet-mono
+.packages
+.tools
 
 # User-specific files
 *.suo
diff --git a/eng/native/configurecompiler.cmake b/eng/native/configurecompiler.cmake
index a6e6ba45808d2..a6537bbd9a600 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 bbc7877e8f9fa..8c4ddff8d2390 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 4fb94531d7698..0edbe2ee6d02b 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 49b0064499eb4..44790724ea0c3 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)
diff --git a/src/coreclr/src/dlls/dbgshim/CMakeLists.txt b/src/coreclr/src/dlls/dbgshim/CMakeLists.txt
index ef2d0e360782b..54cedfeb2c29a 100644
--- a/src/coreclr/src/dlls/dbgshim/CMakeLists.txt
+++ b/src/coreclr/src/dlls/dbgshim/CMakeLists.txt
@@ -24,25 +24,16 @@ else(CLR_CMAKE_TARGET_WIN32)
     set(DEF_SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/dbgshim_unixexports.src)
     set(EXPORTS_FILE ${CMAKE_CURRENT_BINARY_DIR}/dbgshim.exports)
     generate_exports_file(${DEF_SOURCES} ${EXPORTS_FILE})
-endif(CLR_CMAKE_TARGET_WIN32)
 
-if(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD OR CLR_CMAKE_HOST_SUNOS)
-    # This option is necessary to ensure that the overloaded delete operator defined inside
-    # of the utilcode will be used instead of the standard library delete operator.
-    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Xlinker -Bsymbolic")
+    if(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD OR CLR_CMAKE_HOST_SUNOS)
+        # This option is necessary to ensure that the overloaded delete operator defined inside
+        # of the utilcode will be used instead of the standard library delete operator.
+        set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Xlinker -Bsymbolic")
+    endif(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD OR CLR_CMAKE_HOST_SUNOS)
 
-    # Add linker exports file option
-    if(CLR_CMAKE_HOST_SUNOS)
-        set(EXPORTS_LINKER_OPTION -Wl,-M,${EXPORTS_FILE})
-    else(CLR_CMAKE_HOST_SUNOS)
-        set(EXPORTS_LINKER_OPTION -Wl,--version-script=${EXPORTS_FILE})
-    endif(CLR_CMAKE_HOST_SUNOS)
-endif(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD OR CLR_CMAKE_HOST_SUNOS)
+    set_exports_linker_option(${EXPORTS_FILE})
 
-if(CLR_CMAKE_HOST_OSX)
-    # Add linker exports file option
-    set(EXPORTS_LINKER_OPTION -Wl,-exported_symbols_list,${EXPORTS_FILE})
-endif(CLR_CMAKE_HOST_OSX)
+endif(CLR_CMAKE_TARGET_WIN32)
 
 add_library_clr(dbgshim SHARED ${DBGSHIM_SOURCES})
 
diff --git a/src/coreclr/src/dlls/mscordac/CMakeLists.txt b/src/coreclr/src/dlls/mscordac/CMakeLists.txt
index c32c8d1cbe25c..94b61b52692f9 100644
--- a/src/coreclr/src/dlls/mscordac/CMakeLists.txt
+++ b/src/coreclr/src/dlls/mscordac/CMakeLists.txt
@@ -71,34 +71,24 @@ else(CLR_CMAKE_HOST_WIN32)
         # Add lib redefines file to DAC
         list(APPEND CLR_DAC_SOURCES libredefines.S)
     endif(CLR_CMAKE_HOST_LINUX)
-endif(CLR_CMAKE_HOST_WIN32)
 
-if(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD OR CLR_CMAKE_HOST_SUNOS)
-    # This option is necessary to ensure that the overloaded delete operator defined inside
-    # of the utilcode will be used instead of the standard library delete operator.
-    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Xlinker -Bsymbolic")
-
-    # The following linked options can be inserted into the linker libraries list to
-    # ensure proper resolving of circular references between a subset of the libraries.
-    set(START_LIBRARY_GROUP -Wl,--start-group)
-    set(END_LIBRARY_GROUP -Wl,--end-group)
-
-    # These options are used to force every object to be included even if it's unused.
-    set(START_WHOLE_ARCHIVE -Wl,--whole-archive)
-    set(END_WHOLE_ARCHIVE -Wl,--no-whole-archive)
-
-    # Add linker exports file option
-    if(CLR_CMAKE_HOST_SUNOS)
-        set(EXPORTS_LINKER_OPTION -Wl,-M,${EXPORTS_FILE})
-    else(CLR_CMAKE_HOST_SUNOS)
-        set(EXPORTS_LINKER_OPTION -Wl,--version-script=${EXPORTS_FILE})
-    endif(CLR_CMAKE_HOST_SUNOS)
-endif(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD OR CLR_CMAKE_HOST_SUNOS)
-
-if(CLR_CMAKE_HOST_OSX)
-    # Add linker exports file option
-    set(EXPORTS_LINKER_OPTION -Wl,-exported_symbols_list,${EXPORTS_FILE})
-endif(CLR_CMAKE_HOST_OSX)
+    if(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD OR CLR_CMAKE_HOST_SUNOS)
+        # This option is necessary to ensure that the overloaded delete operator defined inside
+        # of the utilcode will be used instead of the standard library delete operator.
+        set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Xlinker -Bsymbolic")
+
+        # The following linked options can be inserted into the linker libraries list to
+        # ensure proper resolving of circular references between a subset of the libraries.
+        set(START_LIBRARY_GROUP -Wl,--start-group)
+        set(END_LIBRARY_GROUP -Wl,--end-group)
+
+        # These options are used to force every object to be included even if it's unused.
+        set(START_WHOLE_ARCHIVE -Wl,--whole-archive)
+        set(END_WHOLE_ARCHIVE -Wl,--no-whole-archive)
+    endif(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD OR CLR_CMAKE_HOST_SUNOS)
+
+    set_exports_linker_option(${EXPORTS_FILE})
+endif(CLR_CMAKE_HOST_WIN32)
 
 # Create object library to enable creation of proper dependency of mscordaccore.exp on mscordac.obj and
 # mscordaccore on both the mscordaccore.exp and mscordac.obj.
diff --git a/src/coreclr/src/dlls/mscordbi/CMakeLists.txt b/src/coreclr/src/dlls/mscordbi/CMakeLists.txt
index 39561e10a038d..b87b3eadb6a13 100644
--- a/src/coreclr/src/dlls/mscordbi/CMakeLists.txt
+++ b/src/coreclr/src/dlls/mscordbi/CMakeLists.txt
@@ -39,25 +39,15 @@ else(CLR_CMAKE_HOST_WIN32)
     set(DEF_SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/mscordbi_unixexports.src)
     set(EXPORTS_FILE ${CMAKE_CURRENT_BINARY_DIR}/mscordbi.exports)
     generate_exports_file(${DEF_SOURCES} ${EXPORTS_FILE})
-endif(CLR_CMAKE_HOST_WIN32)
 
-if(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD OR CLR_CMAKE_HOST_SUNOS)
-    # This option is necessary to ensure that the overloaded new/delete operators defined inside
-    # of the utilcode will be used instead of the standard library delete operator.
-    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Xlinker -Bsymbolic")
-
-    # Add linker exports file option
-    if(CLR_CMAKE_HOST_SUNOS)
-        set(EXPORTS_LINKER_OPTION -Wl,-M,${EXPORTS_FILE})
-    else(CLR_CMAKE_HOST_SUNOS)
-        set(EXPORTS_LINKER_OPTION -Wl,--version-script=${EXPORTS_FILE})
-    endif(CLR_CMAKE_HOST_SUNOS)
-endif(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD OR CLR_CMAKE_HOST_SUNOS)
-
-if(CLR_CMAKE_HOST_OSX)
-    # Add linker exports file option
-    set(EXPORTS_LINKER_OPTION -Wl,-exported_symbols_list,${EXPORTS_FILE})
-endif(CLR_CMAKE_HOST_OSX)
+    if(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD OR CLR_CMAKE_HOST_SUNOS)
+        # This option is necessary to ensure that the overloaded new/delete operators defined inside
+        # of the utilcode will be used instead of the standard library delete operator.
+        set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Xlinker -Bsymbolic")
+    endif(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD OR CLR_CMAKE_HOST_SUNOS)
+
+    set_exports_linker_option(${EXPORTS_FILE})
+endif(CLR_CMAKE_HOST_WIN32)
 
 add_library_clr(mscordbi SHARED ${MSCORDBI_SOURCES})
 target_precompile_header(TARGET mscordbi HEADER stdafx.h)
diff --git a/src/coreclr/src/dlls/mscoree/coreclr/CMakeLists.txt b/src/coreclr/src/dlls/mscoree/coreclr/CMakeLists.txt
index 32fb9e26f5b8c..c676198402dac 100644
--- a/src/coreclr/src/dlls/mscoree/coreclr/CMakeLists.txt
+++ b/src/coreclr/src/dlls/mscoree/coreclr/CMakeLists.txt
@@ -42,22 +42,16 @@ else(CLR_CMAKE_HOST_WIN32)
         # These options are used to force every object to be included even if it's unused.
         set(START_WHOLE_ARCHIVE -Wl,--whole-archive)
         set(END_WHOLE_ARCHIVE -Wl,--no-whole-archive)
-
-        if(CLR_CMAKE_TARGET_SUNOS)
-            set(EXPORTS_LINKER_OPTION -Wl,-M,${EXPORTS_FILE})
-        elseif(CLR_CMAKE_TARGET_SUNOS)
-            set(EXPORTS_LINKER_OPTION -Wl,--version-script=${EXPORTS_FILE})
-        endif(CLR_CMAKE_TARGET_SUNOS)
     endif(CLR_CMAKE_TARGET_LINUX OR CLR_CMAKE_TARGET_FREEBSD OR CLR_CMAKE_TARGET_NETBSD OR CLR_CMAKE_TARGET_SUNOS)
 
     if(CLR_CMAKE_TARGET_OSX)
         # These options are used to force every object to be included even if it's unused.
         set(START_WHOLE_ARCHIVE -force_load)
         set(END_WHOLE_ARCHIVE )
-
-        set(EXPORTS_LINKER_OPTION -Wl,-exported_symbols_list,${EXPORTS_FILE})
     endif(CLR_CMAKE_TARGET_OSX)
 
+    set_exports_linker_option(${EXPORTS_FILE})
+
     if(CLR_CMAKE_TARGET_ANDROID AND CLR_CMAKE_HOST_ARCH_ARM)
         set(EXPORTS_LINKER_OPTION "${EXPORTS_LINKER_OPTION} -Wl,--no-warn-shared-textrel")
     endif(CLR_CMAKE_TARGET_ANDROID AND CLR_CMAKE_HOST_ARCH_ARM)
diff --git a/src/coreclr/src/ilasm/CMakeLists.txt b/src/coreclr/src/ilasm/CMakeLists.txt
index 0036ed4f908c7..ae5419514df5f 100644
--- a/src/coreclr/src/ilasm/CMakeLists.txt
+++ b/src/coreclr/src/ilasm/CMakeLists.txt
@@ -113,14 +113,8 @@ if(CLR_CMAKE_HOST_UNIX)
     mscorrc
     coreclrpal
     palrt
+    ${CMAKE_DL_LIBS}
   )
-
-  # FreeBSD and NetBSD implement dlopen(3) in libc
-  if(NOT CLR_CMAKE_TARGET_FREEBSD AND NOT CLR_CMAKE_TARGET_NETBSD)
-    target_link_libraries(ilasm
-      dl
-    )
-  endif(NOT CLR_CMAKE_TARGET_FREEBSD AND NOT CLR_CMAKE_TARGET_NETBSD)
 else()
   target_link_libraries(ilasm
     ${ILASM_LINK_LIBRARIES}
diff --git a/src/coreclr/src/ildasm/exe/CMakeLists.txt b/src/coreclr/src/ildasm/exe/CMakeLists.txt
index 47531ebfad759..fe0892f6bd30f 100644
--- a/src/coreclr/src/ildasm/exe/CMakeLists.txt
+++ b/src/coreclr/src/ildasm/exe/CMakeLists.txt
@@ -104,14 +104,8 @@ if(CLR_CMAKE_HOST_UNIX)
         mscorrc
         coreclrpal
         palrt
+        ${CMAKE_DL_LIBS}
     )
-
-    # FreeBSD and NetBSD implement dlopen(3) in libc
-    if(NOT CLR_CMAKE_TARGET_FREEBSD AND NOT CLR_CMAKE_TARGET_NETBSD)
-        target_link_libraries(ildasm
-            dl
-        )
-    endif(NOT CLR_CMAKE_TARGET_FREEBSD AND NOT CLR_CMAKE_TARGET_NETBSD)
 else()
     target_link_libraries(ildasm
         ${ILDASM_LINK_LIBRARIES}
diff --git a/src/coreclr/src/jit/CMakeLists.txt b/src/coreclr/src/jit/CMakeLists.txt
index a3f0b1aeb2e0d..85d356536e253 100644
--- a/src/coreclr/src/jit/CMakeLists.txt
+++ b/src/coreclr/src/jit/CMakeLists.txt
@@ -321,16 +321,9 @@ else()
   if(CLR_CMAKE_TARGET_LINUX OR CLR_CMAKE_TARGET_FREEBSD OR CLR_CMAKE_TARGET_NETBSD OR CLR_CMAKE_TARGET_SUNOS)
     # This is required to force using our own PAL, not one that we are loaded with.
     set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Xlinker -Bsymbolic")
-
-    if(CLR_CMAKE_TARGET_SUNOS)
-        set(JIT_EXPORTS_LINKER_OPTION -Wl,-M,${JIT_EXPORTS_FILE})
-    else(CLR_CMAKE_TARGET_SUNOS)
-        set(JIT_EXPORTS_LINKER_OPTION -Wl,--version-script=${JIT_EXPORTS_FILE})
-    endif(CLR_CMAKE_TARGET_SUNOS)
-  elseif(CLR_CMAKE_TARGET_OSX)
-    set(JIT_EXPORTS_LINKER_OPTION -Wl,-exported_symbols_list,${JIT_EXPORTS_FILE})
   endif()
 
+  set_exports_linker_option(${JIT_EXPORTS_FILE})
   set(SHARED_LIB_SOURCES ${SOURCES})
 endif()
 
diff --git a/src/coreclr/src/pal/tests/palsuite/CMakeLists.txt b/src/coreclr/src/pal/tests/palsuite/CMakeLists.txt
index 902f125412b12..091da03fba3c0 100644
--- a/src/coreclr/src/pal/tests/palsuite/CMakeLists.txt
+++ b/src/coreclr/src/pal/tests/palsuite/CMakeLists.txt
@@ -20,6 +20,7 @@ if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
 elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
   add_compile_options(-Wno-sign-compare)
   add_compile_options(-Wno-narrowing)
+  add_compile_options(-fno-builtin)
   add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-fpermissive>)
   add_compile_options(-Wno-int-to-pointer-cast)
 endif()
diff --git a/src/coreclr/src/pal/tests/palsuite/exception_handling/pal_sxs/test1/CMakeLists.txt b/src/coreclr/src/pal/tests/palsuite/exception_handling/pal_sxs/test1/CMakeLists.txt
index 2d2d037ca29c6..0db9b289dc806 100644
--- a/src/coreclr/src/pal/tests/palsuite/exception_handling/pal_sxs/test1/CMakeLists.txt
+++ b/src/coreclr/src/pal/tests/palsuite/exception_handling/pal_sxs/test1/CMakeLists.txt
@@ -18,18 +18,9 @@ convert_to_absolute_path(DEF_SOURCES1 ${DEF_SOURCES1})
 set(EXPORTS_FILE1 ${CMAKE_CURRENT_BINARY_DIR}/dlltest1.exports)
 generate_exports_file(${DEF_SOURCES1} ${EXPORTS_FILE1})
 
-if(CLR_CMAKE_TARGET_LINUX OR CLR_CMAKE_TARGET_FREEBSD OR CLR_CMAKE_TARGET_NETBSD)
-    set(EXPORTS_LINKER_OPTION1 -Wl,--version-script=${EXPORTS_FILE1})
-endif(CLR_CMAKE_TARGET_LINUX OR CLR_CMAKE_TARGET_FREEBSD OR CLR_CMAKE_TARGET_NETBSD)
-
-if(CLR_CMAKE_TARGET_OSX)
-    set(EXPORTS_LINKER_OPTION1 -Wl,-exported_symbols_list,${EXPORTS_FILE1})
-endif(CLR_CMAKE_TARGET_OSX)
-
-if(CLR_CMAKE_TARGET_SUNOS)
-    # Add linker exports file option
-    set(EXPORTS_LINKER_OPTION -Wl,-M,${EXPORTS_FILE})
-endif(CLR_CMAKE_TARGET_SUNOS)
+if(CLR_CMAKE_HOST_UNIX)
+  set_exports_linker_option(${EXPORTS_FILE})
+endif(CLR_CMAKE_HOST_UNIX)
 
 set(DLL1SOURCES dlltest1.cpp)
 add_library(paltest_pal_sxs_test1_dll1 SHARED ${DLL1SOURCES})
diff --git a/src/coreclr/tryrun.cmake b/src/coreclr/tryrun.cmake
index 5fdc28a4f204e..fdd9154cacdcd 100644
--- a/src/coreclr/tryrun.cmake
+++ b/src/coreclr/tryrun.cmake
@@ -6,22 +6,21 @@ macro(set_cache_value)
   set(${ARGV0}__TRYRUN_OUTPUT "dummy output" CACHE STRING "Output from TRY_RUN" FORCE)
 endmacro()
 
-if(EXISTS ${CROSS_ROOTFS}/usr/lib/gcc/armv6-alpine-linux-musleabihf OR
+if(EXISTS ${CROSS_ROOTFS}/usr/lib/gcc/armv7-alpine-linux-musleabihf OR
+   EXISTS ${CROSS_ROOTFS}/usr/lib/gcc/armv6-alpine-linux-musleabihf OR
    EXISTS ${CROSS_ROOTFS}/usr/lib/gcc/aarch64-alpine-linux-musl)
-  
-   SET(ALPINE_LINUX 1)
-else()
-   SET(ALPINE_LINUX 0)
-   if(EXISTS ${CROSS_ROOTFS}/bin/freebsd-version)
-       set(FREEBSD 1)
-       set(CMAKE_SYSTEM_NAME FreeBSD)
-       set(CLR_CMAKE_TARGET_OS FreeBSD)
-   else()
-       SET(FREEBSD 0)
-   endif()
+
+  set(ALPINE_LINUX 1)
+elseif(EXISTS ${CROSS_ROOTFS}/bin/freebsd-version)
+  set(FREEBSD 1)
+  set(CMAKE_SYSTEM_NAME FreeBSD)
+  set(CLR_CMAKE_TARGET_OS FreeBSD)
+elseif(EXISTS ${CROSS_ROOTFS}/usr/platform/i86pc)
+  set(ILLUMOS 1)
+  set(CLR_CMAKE_TARGET_OS SunOS)
 endif()
 
-if(TARGET_ARCH_NAME MATCHES "^(armel|arm|arm64|x86)$" OR FREEBSD)
+if(TARGET_ARCH_NAME MATCHES "^(armel|arm|arm64|x86)$" OR FREEBSD OR ILLUMOS)
   set_cache_value(FILE_OPS_CHECK_FERROR_OF_PREVIOUS_CALL_EXITCODE 1)
   set_cache_value(GETPWUID_R_SETS_ERRNO_EXITCODE 0)
   set_cache_value(HAS_POSIX_SEMAPHORES_EXITCODE 0)
@@ -68,11 +67,31 @@ if(TARGET_ARCH_NAME MATCHES "^(armel|arm|arm64|x86)$" OR FREEBSD)
     set_cache_value(HAVE_BROKEN_FIFO_KEVENT_EXITCODE 1)
     set_cache_value(HAVE_PROCFS_MAPS 0)
     set_cache_value(HAVE_PROCFS_STAT 0)
-    set_cache_value(HAVE_PROCFS_STATUS 0)
+    set_cache_value(HAVE_PROCFS_STATUS_EXITCODE 0)
     set_cache_value(GETPWUID_R_SETS_ERRNO 0)
     set_cache_value(UNGETC_NOT_RETURN_EOF 0)
     set_cache_value(HAVE_COMPATIBLE_ILOGBNAN 1)
     set_cache_value(HAVE_FUNCTIONAL_PTHREAD_ROBUST_MUTEXES_EXITCODE 0)
+  elseif(ILLUMOS)
+    set_cache_value(GETPWUID_R_SETS_ERRNO_EXITCODE 1)
+    set_cache_value(HAVE_COMPATIBLE_ACOS_EXITCODE 1)
+    set_cache_value(HAVE_COMPATIBLE_ASIN_EXITCODE 1)
+    set_cache_value(HAVE_COMPATIBLE_ATAN2_EXITCODE 1)
+    set_cache_value(HAVE_COMPATIBLE_POW_EXITCODE 1)
+    set_cache_value(HAVE_COMPATIBLE_ILOGBNAN_EXITCODE 0)
+    set_cache_value(HAVE_COMPATIBLE_LOG10_EXITCODE 1)
+    set_cache_value(HAVE_COMPATIBLE_LOG_EXITCODE 1)
+    set_cache_value(HAVE_LARGE_SNPRINTF_SUPPORT_EXITCODE 1)
+    set_cache_value(HAVE_PROCFS_CTL_EXITCODE 1)
+    set_cache_value(HAVE_PROCFS_STATUS_EXITCODE 1)
+    set_cache_value(HAVE_CLOCK_THREAD_CPUTIME_EXITCODE 1)
+    set_cache_value(SSCANF_CANNOT_HANDLE_MISSING_EXPONENT_EXITCODE 1)
+    set_cache_value(SSCANF_SUPPORT_ll_EXITCODE 1)
+    set_cache_value(UNGETC_NOT_RETURN_EOF_EXITCODE 0)
+    set_cache_value(COMPILER_SUPPORTS_W_CLASS_MEMACCESS 1)
+    set_cache_value(HAVE_SET_MAX_VARIABLE 1)
+    set_cache_value(HAVE_FULLY_FEATURED_PTHREAD_MUTEXES 1)
+    set_cache_value(HAVE_FUNCTIONAL_PTHREAD_ROBUST_MUTEXES_EXITCODE 0)
   endif()
 else()
   message(FATAL_ERROR "Arch is ${TARGET_ARCH_NAME}. Only armel, arm, arm64 and x86 are supported!")
diff --git a/src/installer/corehost/CMakeLists.txt b/src/installer/corehost/CMakeLists.txt
index 2343e3a741888..651a63be0cac9 100644
--- a/src/installer/corehost/CMakeLists.txt
+++ b/src/installer/corehost/CMakeLists.txt
@@ -12,7 +12,7 @@ if(MSVC)
 elseif (CMAKE_CXX_COMPILER_ID MATCHES GNU)
     # Prevents libc from calling pthread_cond_destroy on static objects in
     # dlopen()'ed library which we dlclose() in pal::unload_library.
-    add_compile_options(-fno-use-cxa-atexit)
+    add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-fno-use-cxa-atexit>)
 endif()
 
 add_subdirectory(cli)
diff --git a/src/installer/corehost/build.sh b/src/installer/corehost/build.sh
index 7be41faa3ca3c..2153c58047dbd 100755
--- a/src/installer/corehost/build.sh
+++ b/src/installer/corehost/build.sh
@@ -98,5 +98,4 @@ setup_dirs
 check_prereqs
 
 # Build the installer native components.
-# note the third argument, tryrun_dir is empty for installers
-build_native "$__BuildArch" "$__scriptpath" "" "$__IntermediatesDir" "installer component"
+build_native "$__BuildArch" "$__scriptpath" "$__scriptpath" "$__IntermediatesDir" "installer component"
diff --git a/src/installer/corehost/cli/fxr/standalone/CMakeLists.txt b/src/installer/corehost/cli/fxr/standalone/CMakeLists.txt
index 0a2ea92174b6f..1a2147cff1427 100644
--- a/src/installer/corehost/cli/fxr/standalone/CMakeLists.txt
+++ b/src/installer/corehost/cli/fxr/standalone/CMakeLists.txt
@@ -35,20 +35,7 @@ else(CLR_CMAKE_TARGET_WIN32)
     set(EXPORTS_FILE ${CMAKE_CURRENT_BINARY_DIR}/hostfxr.exports)
     generate_exports_file(${DEF_SOURCES} ${EXPORTS_FILE})
 
-    if(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD)
-        # Add linker exports file option
-        set(EXPORTS_LINKER_OPTION -Wl,--version-script=${EXPORTS_FILE})
-    endif(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD)
-
-    if(CLR_CMAKE_HOST_OSX)
-        # Add linker exports file option
-        set(EXPORTS_LINKER_OPTION -Wl,-exported_symbols_list,${EXPORTS_FILE})
-    endif(CLR_CMAKE_HOST_OSX)
-
-    if(CLR_CMAKE_HOST_SUNOS)
-        # Add linker exports file option
-        set(EXPORTS_LINKER_OPTION -Wl,-M,${EXPORTS_FILE})
-    endif(CLR_CMAKE_HOST_SUNOS)
+    set_exports_linker_option(${EXPORTS_FILE})
 endif(CLR_CMAKE_TARGET_WIN32)
 
 include(../../lib.cmake)
diff --git a/src/installer/corehost/cli/hostpolicy/standalone/CMakeLists.txt b/src/installer/corehost/cli/hostpolicy/standalone/CMakeLists.txt
index d6631543f81b5..88fe378b7a66f 100644
--- a/src/installer/corehost/cli/hostpolicy/standalone/CMakeLists.txt
+++ b/src/installer/corehost/cli/hostpolicy/standalone/CMakeLists.txt
@@ -29,20 +29,7 @@ else(CLR_CMAKE_TARGET_WIN32)
     set(EXPORTS_FILE ${CMAKE_CURRENT_BINARY_DIR}/hostpolicy.exports)
     generate_exports_file(${DEF_SOURCES} ${EXPORTS_FILE})
 
-    if(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD)
-        # Add linker exports file option
-        set(EXPORTS_LINKER_OPTION -Wl,--version-script=${EXPORTS_FILE})
-    endif(CLR_CMAKE_HOST_LINUX OR CLR_CMAKE_HOST_FREEBSD OR CLR_CMAKE_HOST_NETBSD)
-
-    if(CLR_CMAKE_HOST_OSX)
-        # Add linker exports file option
-        set(EXPORTS_LINKER_OPTION -Wl,-exported_symbols_list,${EXPORTS_FILE})
-    endif(CLR_CMAKE_HOST_OSX)
-
-    if(CLR_CMAKE_HOST_SUNOS)
-        # Add linker exports file option
-        set(EXPORTS_LINKER_OPTION -Wl,-M,${EXPORTS_FILE})
-    endif(CLR_CMAKE_HOST_SUNOS)
+    set_exports_linker_option(${EXPORTS_FILE})
 endif(CLR_CMAKE_TARGET_WIN32)
 
 include(../../lib.cmake)
diff --git a/src/installer/corehost/tryrun.cmake b/src/installer/corehost/tryrun.cmake
new file mode 100644
index 0000000000000..eba94aea7cb74
--- /dev/null
+++ b/src/installer/corehost/tryrun.cmake
@@ -0,0 +1,28 @@
+set(CROSS_ROOTFS $ENV{ROOTFS_DIR})
+set(TARGET_ARCH_NAME $ENV{TARGET_BUILD_ARCH})
+
+macro(set_cache_value)
+  set(${ARGV0} ${ARGV1} CACHE STRING "Result from TRY_RUN" FORCE)
+  set(${ARGV0}__TRYRUN_OUTPUT "dummy output" CACHE STRING "Output from TRY_RUN" FORCE)
+endmacro()
+
+if(EXISTS ${CROSS_ROOTFS}/usr/lib/gcc/armv7-alpine-linux-musleabihf OR
+   EXISTS ${CROSS_ROOTFS}/usr/lib/gcc/armv6-alpine-linux-musleabihf OR
+   EXISTS ${CROSS_ROOTFS}/usr/lib/gcc/aarch64-alpine-linux-musl)
+
+  set(ALPINE_LINUX 1)
+elseif(EXISTS ${CROSS_ROOTFS}/bin/freebsd-version)
+  set(FREEBSD 1)
+  set(CMAKE_SYSTEM_NAME FreeBSD)
+  set(CLR_CMAKE_TARGET_OS FreeBSD)
+elseif(EXISTS ${CROSS_ROOTFS}/usr/platform/i86pc)
+  set(ILLUMOS 1)
+endif()
+
+if(TARGET_ARCH_NAME MATCHES "^(armel|arm|arm64|x86)$" OR FREEBSD OR ILLUMOS)
+  if(ILLUMOS)
+    set_cache_value(COMPILER_SUPPORTS_W_CLASS_MEMACCESS 0)
+  endif()
+else()
+  message(FATAL_ERROR "Arch is ${TARGET_ARCH_NAME}. Only armel, arm, arm64 and x86 are supported!")
+endif()
diff --git a/src/libraries/Native/Unix/tryrun.cmake b/src/libraries/Native/Unix/tryrun.cmake
index a1d7384f5a955..84b727f4c2ee2 100644
--- a/src/libraries/Native/Unix/tryrun.cmake
+++ b/src/libraries/Native/Unix/tryrun.cmake
@@ -6,23 +6,21 @@ macro(set_cache_value)
   set(${ARGV0}__TRYRUN_OUTPUT "dummy output" CACHE STRING "Output from TRY_RUN" FORCE)
 endmacro()
 
-if(EXISTS ${CROSS_ROOTFS}/usr/lib/gcc/armv6-alpine-linux-musleabihf OR
+if(EXISTS ${CROSS_ROOTFS}/usr/lib/gcc/armv7-alpine-linux-musleabihf OR
+   EXISTS ${CROSS_ROOTFS}/usr/lib/gcc/armv6-alpine-linux-musleabihf OR
    EXISTS ${CROSS_ROOTFS}/usr/lib/gcc/aarch64-alpine-linux-musl)
-  
-   SET(ALPINE_LINUX 1)
-   SET(FREEBSD 0)
-else()
-   SET(ALPINE_LINUX 0)
-   if(EXISTS ${CROSS_ROOTFS}/bin/freebsd-version)
-       set(FREEBSD 1)
-       set(CMAKE_SYSTEM_NAME FreeBSD)
-       set(CLR_CMAKE_TARGET_OS FreeBSD)
-   else()
-       SET(FREEBSD 0)
-   endif()
+
+  set(ALPINE_LINUX 1)
+elseif(EXISTS ${CROSS_ROOTFS}/bin/freebsd-version)
+  set(FREEBSD 1)
+  set(CMAKE_SYSTEM_NAME FreeBSD)
+  set(CLR_CMAKE_TARGET_OS FreeBSD)
+elseif(EXISTS ${CROSS_ROOTFS}/usr/platform/i86pc)
+  set(ILLUMOS 1)
+  set(CLR_CMAKE_TARGET_OS SunOS)
 endif()
 
-if(TARGET_ARCH_NAME MATCHES "^(armel|arm|arm64|x86)$" OR FREEBSD)
+if(TARGET_ARCH_NAME MATCHES "^(armel|arm|arm64|x86)$" OR FREEBSD OR ILLUMOS)
   set_cache_value(HAVE_CLOCK_MONOTONIC_EXITCODE 0)
   set_cache_value(HAVE_CLOCK_REALTIME_EXITCODE 0)
 
@@ -31,7 +29,8 @@ if(TARGET_ARCH_NAME MATCHES "^(armel|arm|arm64|x86)$" OR FREEBSD)
   else()
     set_cache_value(HAVE_SHM_OPEN_THAT_WORKS_WELL_ENOUGH_WITH_MMAP_EXITCODE 0)
   endif()
-  if (FREEBSD)
+
+  if(FREEBSD)
     set_cache_value(HAVE_SHM_OPEN_THAT_WORKS_WELL_ENOUGH_WITH_MMAP 1)
     set_cache_value(HAVE_CLOCK_MONOTONIC 1)
     set_cache_value(HAVE_CLOCK_REALTIME 1)
diff --git a/src/libraries/System.Data.Odbc/src/System.Data.Odbc.csproj b/src/libraries/System.Data.Odbc/src/System.Data.Odbc.csproj
index b05b0d289d1b2..c3eed38e3b549 100644
--- a/src/libraries/System.Data.Odbc/src/System.Data.Odbc.csproj
+++ b/src/libraries/System.Data.Odbc/src/System.Data.Odbc.csproj
@@ -2,7 +2,7 @@
   <PropertyGroup>
     <NoWarn>$(NoWarn);CA2249</NoWarn>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-    <TargetFrameworks>$(NetCoreAppCurrent)-Windows_NT;netcoreapp2.0-FreeBSD;netcoreapp2.0-Linux;netcoreapp2.0-OSX;netcoreapp2.0-Windows_NT;net461-Windows_NT;netstandard2.0;$(NetCoreAppCurrent)-FreeBSD;$(NetCoreAppCurrent)-Linux;$(NetCoreAppCurrent)-OSX;$(NetCoreAppCurrent)-iOS;$(NetCoreAppCurrent)-tvOS;$(NetFrameworkCurrent)-Windows_NT</TargetFrameworks>
+    <TargetFrameworks>$(NetCoreAppCurrent)-Windows_NT;netcoreapp2.0-FreeBSD;netcoreapp2.0-Linux;netcoreapp2.0-OSX;netcoreapp2.0-Windows_NT;net461-Windows_NT;netstandard2.0;$(NetCoreAppCurrent)-FreeBSD;$(NetCoreAppCurrent)-illumos;$(NetCoreAppCurrent)-Solaris;$(NetCoreAppCurrent)-Linux;$(NetCoreAppCurrent)-OSX;$(NetCoreAppCurrent)-iOS;$(NetCoreAppCurrent)-tvOS;$(NetFrameworkCurrent)-Windows_NT</TargetFrameworks>
     <ExcludeCurrentNetCoreAppFromPackage>true</ExcludeCurrentNetCoreAppFromPackage>
     <ExcludeCurrentFullFrameworkFromPackage>true</ExcludeCurrentFullFrameworkFromPackage>
   </PropertyGroup>
@@ -109,7 +109,7 @@
     <Compile Include="$(CommonPath)Interop\Interop.Odbc.cs"
              Link="Common\Interop\Interop.Odbc.cs" />
   </ItemGroup>
-  <ItemGroup Condition="'$(TargetsLinux)' == 'true' or '$(TargetsFreeBSD)' == 'true'">
+  <ItemGroup Condition="'$(TargetsLinux)' == 'true' or '$(TargetsFreeBSD)' == 'true' or '$(TargetsIllumos)' == 'true' or '$(TargetsSolaris)' == 'true'">
     <Compile Include="$(CommonPath)Interop\Linux\Interop.Libraries.cs"
              Link="Common\Interop\Linux\Interop.Libraries.cs" />
   </ItemGroup>
@@ -169,4 +169,4 @@
   <ItemGroup>
     <None Include="DatabaseSetupInstructions.md" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>