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diff --git a/README.configure b/README.configure new file mode 100644 index 0000000000..ed8ae78476 --- /dev/null +++ b/README.configure @@ -0,0 +1,179 @@ + +1. Autoconf support +=================== + +This version of RTEMS is configured with GNU autoconf. RTEMS can be +configured and built either standalone or together with the compiler +tools in the Cygnus one-tree structure. Using autoconf also means +that RTEMS now can be built in a separate build directory. + +2. Installation +=============== + +2.1 Standalone build + +To configure RTEMS for a specific target, run configure in the build +directory. In addition to the standard configure options, the following +RTEMS-specific option are supported: + + --disable-rtems-inlines + --disable-posix + --disable-tests + --enable-rtemsbsp="bsp1 bsp2 ..." + +By default, the RTEMS posix interface is built for targets that support +it. It can be disabled with the --disable-posix option. The --disable-tests +will not configure the RTEMS test suite. This is used only to speed-up +configuration in case building the tests are not necessary. By default, +all bsps for a target are built. There is two ways of changing this: + + + use the --enable-rtemsbsp otion which will set the specified + bsps as the default bsps, or + + set the RTEMSBSP variable during make (see below). + +The cross-compiler is set to $(target)-gcc by default. This can be +overriden by one of the following methods: + + + running make with CC_FOR_TARGET=compiler_to_use. The same applies to + all the target specific tools (AS, AR, NM, OBJCOPY, SIZE, LD), or + + by using the --program-prefix option to configure to specify the + string which will prepended to the tool names. Be sure to include + a trailing "-". For example, to use a m68k-coff toolset, use the + --program-prefix=m68k-coff- option. + +The --target= option configures RTEMS for a specific target architecture. +The following targets are supported: + + (none) will build the host-based version on Linux, + Solaris and HPUX. + + a29k-rtems only standalone, uses non-gnu compiler + i386-rtems + i960-rtems + hppa1_1-rtems + m68k-rtems + mips64orion-rtems + no_cpu-rtems + powerpc-rtems + sparc-rtems + +To build, run make in the build directory. To specify which bsps to build, +add the RTEMSBSP="bsp1 bsp2 .." to the make command. + +Installation is done under $(prefix)/$(target)/rtems. + +As an example, to build and install the mvme136 and dmv152 bsps for m68k do: + + (path_to_rtems_src)/configure --target=m68k-rtems + + make RTEMSBSP="mvme136 dmv152" + + make install RTEMSBSP="mvme136 dmv152" + + +The sample tests are built by 'make all', do a 'make test' to build the full +test suite. + +2.2 Build with Cygnus one-tree release + +To build and install RTEMS with the one-tree structure, just copy the rtems +directory to the tree. The one-tree configure.in and Makefile.in has to be +replaced with the RTEMS-aware versions. The build options are the same as +for the standalone build. + +3. To use the installed RTEMS library +===================================== + +To use the installed RTEMS bsps to build applications, the application +makefile has to include a bsp-specific makefile that will define the +RTEMS variables necessary to find include files and libraries. The +bsp-specific makefile is installed at + + $(prefix)/$(target)/rtmes/$(RTEMS_BSP)/Makefile.inc + +For the erc32 bsp installed at /usr/local/cross, the line would read: + +include /usr/local/cross/sparc-rtems/rtems/erc32/Makefile.inc + + +4. Supported target bsps +======================== + +The following bsps are supported: + +host-based : posix (on linux, solaris and hpux) + +a29k : portsw +i386 : force386 i386ex +i960 : cvme961 +hppa1_1 : simhppa +m68k : efi332 gen68302 idp mvme147 mvme162 dmv152 efi68k gen68360 + mvme136 mvme147s go32 +no_cpu : no_bsp +mips64orion : p4600 p4650 (p4000 port with either R4600 or R4650) +powerpc : papyrus +sparc : erc32 + +5. Makefile structure +===================== + +The makefiles have been re-organised. Most gnu-based bsps now use three +main makefiles: + + custom/default.cfg, + + custom/bsp.cfg and + + ompilers/gcc-target-default.cfg. + +Default.cfg sets the deafult values of certain common build options. + +Bsp.cfg set bsp-specific build options and can also override the +default settings. + +Gcc-target-default.cfg contains the common gcc definitions. Some targets +(a29k, no_cpu, and posix) still use the old structure. + +6. Adding a bsp +=============== + +The top-level configure.in has to be modified if a new target is added +or if a new bsp is to be built by default. The additions required is +basically to add which makefiles are to be created by configure and +to add the target to the selection statement. To re-generate +configure, autoconf-2.12 is needed. + +7. Tested configurations +======================== + +All gnu-based bsps have been built on Linux. +The native (posix) ports have been built and run on Linux ans Solaris. +The sparc port has been tested on SunOS and Linux. + +The following configurations have NOT been tested: + + + Anything on Nextstep, HPUX and Irix. + + The a29k port. + +8. Pre-requisites +================= + +Gawk version 2 or higher. +GNU make version 3.72 or higher. +Bash. +gcc version ??? + +TODO +==== + +The install-if-change script requires bash. On solaris systems, this should +be changed to ksh, since ksh is provided with solaris (bash not). + +A fairly rescent version of gawk is needed to build RTEMS. This should be +changed so that a plain vanilla awk also works. + +'make install' should only install necessary files, not the full +PROJECT_RELEASE directory as now. + +Posix port on solaris-2.5 fails due to undefined built-in functions +(gcc-2.7.2, might be my installation). + +Improve support for 'make CFLAGS=xxx'. + |