--- a/Source/WTF/wtf/Platform.h 2020-04-14 00:51:51.000000000 +0200 +++ b/Source/WTF/wtf/Platform.h 2020-08-02 15:08:02.169747050 +0200 @@ -95,7 +95,12 @@ #define WTF_MIPS_PIC (defined __PIC__) #define WTF_MIPS_ISA(v) (defined WTF_MIPS_ARCH && WTF_MIPS_ARCH == v) #define WTF_MIPS_ISA_AT_LEAST(v) (defined WTF_MIPS_ARCH && WTF_MIPS_ARCH >= v) -#define WTF_MIPS_ARCH_REV __mips_isa_rev +#ifdef __mips_isa_rev +#define WTF_MIPS_ARCH_REV __mips_isa_rev +#else +/* The compiler hasn't defined the isa rev so assume it's MIPS I - V (0) */ +#define WTF_MIPS_ARCH_REV 0 +#endif #define WTF_MIPS_ISA_REV(v) (defined WTF_MIPS_ARCH_REV && WTF_MIPS_ARCH_REV == v) #define WTF_MIPS_DOUBLE_FLOAT (defined __mips_hard_float && !defined __mips_single_float) #define WTF_MIPS_FP64 (defined __mips_fpr && __mips_fpr == 64)