fix zig

Signed-off-by: Cocoa <i@uwucocoa.moe>

Author: cocoa-xu

cc_toolchain/aarch64-linux-musl.cmake

@@ -5,7 +5,7 @@ set(CMAKE_SYSTEM_NAME Linux)
 set(CMAKE_SYSTEM_PROCESSOR aarch64)
 set(TARGET_SYS aarch64-linux-musl)
 include(${CMAKE_CURRENT_LIST_DIR}/zig.toolchain.cmake)
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC -std=c++17")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
 
 set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
 set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)

cc_toolchain/riscv64-linux-musl.cmake

@@ -5,7 +5,7 @@ set(CMAKE_SYSTEM_NAME Linux)
 set(CMAKE_SYSTEM_PROCESSOR riscv64)
 set(TARGET_SYS riscv64-linux-musl)
 include(${CMAKE_CURRENT_LIST_DIR}/zig.toolchain.cmake)
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC -std=c++17")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
 
 set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
 set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)

cc_toolchain/zig.toolchain.cmake

@@ -89,7 +89,7 @@ if(TARGET_SYS AND NOT ZIG_INIT)
 
   set(CMAKE_CXX_COMPILER_FORCED 1)
   set(CMAKE_CXX_COMPILER_ID_RUN TRUE)
-  set(CMAKE_CXX_COMPILER ${ZIG_TOOLCHAIN_PATH} c++ "-target ${TARGET_SYS} -fPIC")
+  set(CMAKE_CXX_COMPILER ${ZIG_TOOLCHAIN_PATH} c++ "-target ${TARGET_SYS} -fPIC -std=c++17")
   set(CMAKE_CXX_COMPILER_ID "zig")
   set(CMAKE_CXX_COMPILER_VERSION 12.0)
   set(CMAKE_CXX_COMPILER_TARGET   ${TARGET_SYS})