Add support for building libsql-ffi on ARM (#2016)

Closes #2015

Author: penberg

libsql-ffi/build.rs

@@ -486,6 +486,8 @@ fn build_multiple_ciphers(target: &str, out_path: &Path) {
             "x86_64"
         } else if cc.contains("aarch64") {
             "arm64"
+        } else if cc.contains("arm") {
+            "arm"
         } else {
             panic!("Unsupported cross target {}", cc)
         };

libsql-ffi/bundled/SQLite3MultipleCiphers/CMakeLists.txt

@@ -279,7 +279,8 @@ if (CMAKE_SYSTEM_NAME STREQUAL "Linux"
   # Do not set `-maes -msee4.2` when we are on arm which doesn't support
   # this instruction set.
   if (CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64"
-      OR CMAKE_SYSTEM_PROCESSOR STREQUAL "arm64")
+      OR CMAKE_SYSTEM_PROCESSOR STREQUAL "arm64"
+      OR CMAKE_SYSTEM_PROCESSOR STREQUAL "arm")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
   else()
@@ -298,7 +299,9 @@ if (CMAKE_SYSTEM_NAME STREQUAL "Linux"
   set(SHARED_LIB_EXPORT_DEFINITION "__attribute__((visibility(\"default\")))")
 else()
   if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT (
-      CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64" OR CMAKE_SYSTEM_PROCESSOR STREQUAL "arm64"
+      CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64"
+      OR CMAKE_SYSTEM_PROCESSOR STREQUAL "arm64"
+      OR CMAKE_SYSTEM_PROCESSOR STREQUAL "arm"
   ))
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -msse4.2 -maes")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse4.2 -maes")
@@ -307,7 +310,9 @@ else()
 endif()
 
 if (CMAKE_C_COMPILER_ID STREQUAL "Clang" AND NOT (
-      CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64" OR CMAKE_SYSTEM_PROCESSOR STREQUAL "arm64"
+      CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64"
+      OR CMAKE_SYSTEM_PROCESSOR STREQUAL "arm64"
+      OR CMAKE_SYSTEM_PROCESSOR STREQUAL "arm"
   ))
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -msse4.2 -maes -Wno-error=incompatible-function-pointer-types")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse4.2 -maes")