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+%************************************************************************
+%* *
+\section[mkworld-plat-mipsriscos]{Configuration stuff for MIPS machines running RISCos}
+%* *
+%************************************************************************
+
+Derived from the Paul DuBois's configuration stuff.
+
+NOTES:
+
+The MIPS RISC/os modifications are for MIPS machines running RISC/os 4.0
+or later.
+
+To make makefiles for RISC/os you MUST set your environment
+variable JMAKEINCLUDE:
+ setenv JMAKEINCLUDE "-I. -Dmipsriscos -DSYSTYPE_SYSV"
+ (or) setenv JMAKEINCLUDE "-I. -Dmipsriscos -DSYSTYPE_BSD"
+as appropriate. Cpp does not set these on RISC/os; cc does, but cc is not used
+with jmake.
+
+For RISC/os it is important that the compiler, linker, include files and
+libraries be compatible with each other. This can mostly be taken care of
+by specifying the -systype {sysv,bsd43} option in the definition of CcCmd,
+which will alert the compiler which versions of itself, the linker and
+libraries are to be used, and for the most part, the proper include files.
+This works whether your PATH setting causes /bin/cc or /usr/bsd43/bin/cc
+to be found first. (-systype cannot be specified in StandardCppDefines,
+because those get passed to makedepend, and makedepend gets confused
+because -systype takes a following argument.)
+
+If installed versions of jmake or makedepend are used, it is important
+that they have been compiled in the same environment as that used to
+compile this project, or you will get sysv/bsd conflicts. It may be
+best to compile them for both environments and install in /usr/bin and
+/bsd43/usr/bin as appropriate.
+
+The compiled version of makedepend works properly subject to the above
+caveat, and is much faster than the script version. The script version
+(define UseCCMakeDepend) always works and needs no special hacking to know
+about compilation environment, but it's slower. It also generates warnings
+about "--" and -O which can be ignored. util/makedepend/Jmakefile was hacked
+from the X11R4 release to recognize how to set INCLUDEDIR properly for RISC/os.
+
+The Jmakefiles contain commands to format the man pages and install them as
+required; however since RISC/os does not include nroff this will typically
+not be effective. If you have the BSD or DWB packages installed, you may
+be in better shape.
+
+\begin{code}
+/*
+ SET VERSION NUMBERS BEFORE MAKING MAKEFILES
+*/
+
+#define OSMajorVersion 4
+#define OSMinorVersion 51
+
+#define CCompilerMajorVersion 2
+#define CCompilerMinorVersion 11
+
+
+#define BootstrapCFlags -Dmipsriscos
+
+/*
+ For BSD environment, need -ltermcap for v?printf. It's not in
+ the BSD C library! (Yet.)
+*/
+
+#define InstallCmd /etc/mipsinstall
+#define InstFileFlags -f
+
+#ifndef UsrLibDir
+#if SystemV
+#define UsrLibDir /usr/lib
+#else
+#define UsrLibDir /usr/bsd43/usr/lib
+#endif
+#endif
+
+#ifndef IncludeRoot
+#if SystemV
+#define IncludeRoot /usr/include
+#else
+#define IncludeRoot /usr/include/bsd43
+#endif
+#endif
+
+#define HasVarargs YES
+/*
+ Make sure to use signal semantics that are consistent with
+ the compilation environment.
+*/
+#if SystemV
+#define HasVoidSignalReturn YES
+#else
+#define HasVoidSignalReturn NO
+#endif
+
+/* does this work? or can it be done better? ToDo */
+BUILDPLATFORM=HostPlatform
+\end{code}