cmake: host-gcc: Detect libgcc for all archs

This commit updates the build system to always detect the libgcc path
for the host platforms regardless of the target architecture.

The native_posix_64 target previously used the x32 ABI (`-mx32`) and
the multilib for this ABI was not commonly available in the x86-64 host
toolchains.

That is no longer the case because native_posix_64 had been updated to
use the x86-64 ABI (`-m64`).

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

cmake/compiler/host-gcc/target.cmake

@@ -18,20 +18,15 @@ else()
 endif()
 find_program(CMAKE_CXX_COMPILER ${cplusplus_compiler}     CACHE INTERNAL " " FORCE)
 
-# The x32 version of libgcc is usually not available (can't trust gcc
-# -mx32 --print-libgcc-file-name) so don't fail to build for something
-# that is currently not needed. See comments in compiler/gcc/target.cmake
-if (CONFIG_X86)
-  # Convert to list as cmake Modules/*.cmake do it
-  STRING(REGEX REPLACE " +" ";" PRINT_LIBGCC_ARGS "${CMAKE_C_FLAGS}")
-  # This libgcc code is partially duplicated in compiler/*/target.cmake
-  execute_process(
-    COMMAND ${CMAKE_C_COMPILER} "${PRINT_LIBGCC_ARGS}" --print-libgcc-file-name
-    OUTPUT_VARIABLE LIBGCC_FILE_NAME
-    OUTPUT_STRIP_TRAILING_WHITESPACE
-    )
-  assert_exists(LIBGCC_FILE_NAME)
-endif()
+# Convert to list as cmake Modules/*.cmake do it
+STRING(REGEX REPLACE " +" ";" PRINT_LIBGCC_ARGS "${CMAKE_C_FLAGS}")
+# This libgcc code is partially duplicated in compiler/*/target.cmake
+execute_process(
+  COMMAND ${CMAKE_C_COMPILER} "${PRINT_LIBGCC_ARGS}" --print-libgcc-file-name
+  OUTPUT_VARIABLE LIBGCC_FILE_NAME
+  OUTPUT_STRIP_TRAILING_WHITESPACE
+  )
+assert_exists(LIBGCC_FILE_NAME)
 
 set(NOSTDINC "")