CMake: If target arch cannot be detected, don't throw an error

This only happens when ccache is improperly in use and -dumpmachine
doesn't work. Not on our ARM build platform.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 735e553f7bb5802d4a501d6f17d19eae48f33e78..7e85b40a417d3b894aa59e88657aefb7cd24a21a 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -390,12 +390,12 @@ if(NOT MSVC)
   )
 
   if (RESULT)
-    message(FATAL_ERROR "Failed to detect target architecture: ${RESULT}")
+    message(STATUS "Failed to detect target architecture with compiler ${CMAKE_C_COMPILER}: ${RESULT}")
   endif()
 
-  string(REGEX MATCH "([^-]+).*" ARCH_MATCH ${ARCH})
+  string(REGEX MATCH "([^-]+).*" ARCH_MATCH "${ARCH}")
   if (NOT CMAKE_MATCH_1 OR NOT ARCH_MATCH)
-    message(FATAL_ERROR "Failed to match the target architecture: ${ARCH}")
+    message(STATUS "Failed to match the target architecture: ${ARCH}")
   endif()
 
   set(ARCH ${CMAKE_MATCH_1})