使用arm-none-eabi编译出现枚举32-bit告警

liuning587

大家好！我在使用arm-none-eabi-编译器，编译sylixos源码，连接时会报一个枚举32bit告警，初步看对运行好像没什么影响。请问下这个问题有什么解决方法不？
和 -fno-short-enums参数有关吗？

我用的编译器版本是：gcc version 4.9.3 20150529 (release)


具体告警信息如下：

1. c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/bin/ld.exe: warning: c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/lib\libm.a(lib_a-s_fpclassify.o) uses variable-size enums yet the output is to use 32-bit enums; use of enum values across objects may fail
   
2. c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/bin/ld.exe: warning: c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/lib\libm.a(lib_a-s_ldexp.o) uses variable-size enums yet the output is to use 32-bit enums; use of enum values across objects may fail
   
3. c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/bin/ld.exe: warning: c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/lib\libm.a(lib_a-s_modf.o) uses variable-size enums yet the output is to use 32-bit enums; use of enum values across objects may fail
   
4. c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/bin/ld.exe: warning: c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/lib\libm.a(lib_a-s_scalbn.o) uses variable-size enums yet the output is to use 32-bit enums; use of enum values across objects may fail
   
5. c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/bin/ld.exe: warning: c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/lib\libm.a(lib_a-s_copysign.o) uses variable-size enums yet the output is to use 32-bit enums; use of enum values across objects may fail
   
6. c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/bin/ld.exe: warning: c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/lib\libm.a(lib_a-s_finite.o) uses variable-size enums yet the output is to use 32-bit enums; use of enum values across objects may fail
   
7. c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/bin/ld.exe: warning: c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3\libgcc.a(bpabi.o) uses variable-size enums yet the output is to use 32-bit enums; use of enum values across objects may fail
   
8. c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/bin/ld.exe: warning: c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3\libgcc.a(_divdi3.o) uses variable-size enums yet the output is to use 32-bit enums; use of enum values across objects may fail
   
9. c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/bin/ld.exe: warning: c:/armgcc/bin/../lib/gcc/arm-none-eabi/4.9.3\libgcc.a(_udivdi3.o) uses variable-size enums yet the output is to use 32-bit enums; use of enum values across objects may fail

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