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gnu/gcc/gcc-2.2.2/README.MIPS

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+If you use the 1.31 version of the MIPS assembler (such as was shipped
+with Ultrix 3.1), you will need to use the -fno-delayed-branch switch
+when optimizing floating point code.  Otherwise, the assembler will
+complain when the GCC compiler fills a branch delay slot with a
+floating point instruction, such as add.d.
+
+The GCC compiler on the MIPS will put small strings into the short
+data area, rather than the read-only data section.  This is so that
+references to the strings only take one instruction, instead of the
+normal two instructions.
+
+Users have reported some problems with version 2.0 of the MIPS
+compiler tools (Ultrix 4.1).  Version 2.10 seems to work (Ultrix 4.2).