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用低版本GCC4.9.2编译静态库时报错 error: 'for' loop initial declarations are only allowed in C99 or C11 mode

用低版本GCC4.9.2编译静态库时报错

>gcc -c activityIntensity.c

用低版本GCC4.9.2编译静态库时报错 error: 'for' loop initial declarations are only allowed in C99 or C11 mode

 更改为:

>gcc -c activityIntensity.c -std=c99

成功编译

用低版本GCC4.9.2编译静态库时报错 error: 'for' loop initial declarations are only allowed in C99 or C11 mode