forked from Imagelibrary/rtems
9572c41d09
This is an attempt to work-around a couple of nasty bugs in librdbg's
Makefiles and configuration:
Configure and build RTEMS as below:
configure --enable-networking --enable-rdbg --target=i386-rtems
make RTEMS_BSP=i386ex
After a few minutes you will notice that building aborts in librdbg ....
Analysis:
1) librdbg is tried to be built, though librdbg is not supported and the
required directory hierarchy librdbg/i386/i386ex/ is not existant.
The cause for this is incorrect setting of HAS_RDBG in most
make/custom/*.cfg files (except pc386.cfg). At the moment all
custom/*.cfg files (except pc386.cfg) in general are required to contain
HAS_RDBG=no. However, having HAS_NETWORKING=no in most custom/*.cfg
files and the toplevel configure script suppress building librdbg for
all CPUs except of i386.
=> The i386ex BSP falls though this scheme and librdbg is tried to be
build (CPU=i386 and HAS_NETWORKING=yes).
2) The Makefile.ins below lib/librdbg in general support i386/pc386 only
and are not capable to be used for multiple CPUs or BSPs (RPCGEN
generates it's target and bsp-specific files into librdbg/, therefore no
other CPU or BSP can ever be built afterwards). This problem is hidden
until now, because only a single CPU/BSP pair (i386/pc386) is really
supported.
3) The Makefile.ins below lib/librdbg can delete source files due to
improper handling of source files (make clean removes the *.x files in
the source-tree when configuring inside of the source-tree).
The patch below tries to work-around these problems for the i386ex and
the pc386 BSPs. This work-around is rather fragile (it applies rpcgen
-D, I don't know how portable this is) and incomplete (all custom/*.cfg
except of pc386.cfg should contain HAS_RDBG=no), nevertheless it should
work.
81 lines
2.3 KiB
INI
81 lines
2.3 KiB
INI
#
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# Config file for the force386 BSP
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#
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# $Id$
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#
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include $(RTEMS_ROOT)/make/custom/default.cfg
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RTEMS_CPU=i386
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RTEMS_CPU_MODEL=i386_fp
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# This is the actual bsp directory used during the build process.
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RTEMS_BSP_FAMILY=force386
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# This contains the compiler options necessary to select the CPU model
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# and (hopefully) optimize for it.
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#
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CPU_CFLAGS =
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# optimize flag: typically -0, could use -O4 or -fast
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# -O4 is ok for RTEMS
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CFLAGS_OPTIMIZE_V=-O4 -fomit-frame-pointer
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# This target does NOT support the TCP/IP stack so ignore requests
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# to enable it.
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HAS_NETWORKING=no
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# This BSP does not support librdbg
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HAS_RDBG=no
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# This section makes the target dependent options file.
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# NDEBUG (C library)
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# if defined asserts do not generate code. This is commonly used
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# as a command line option.
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#
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# RTEMS_TEST_NO_PAUSE (RTEMS tests)
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# do not pause between screens of output in the rtems tests
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#
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# RTEMS_DEBUG (RTEMS)
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# If defined, debug checks in RTEMS and support library code are enabled.
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define make-target-options
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@echo "/* #define NDEBUG 1 */ " >>$@
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@echo "#define RTEMS_TEST_NO_PAUSE 1" >>$@
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@echo "/* #define RTEMS_DEBUG 1 */" >>$@
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endef
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# Here is the rule to actually build a $(ARCH)/foo.exe
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# It also builds $(ARCH)/foo.sr and $(ARCH)/foo.nm
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# Usage ref: src/tests/sptest/sp1/Makefile
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# The following are definitions of make-exe which will work using ld as
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# is currently required. It is expected that as of gcc 2.8, the end user
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# will be able to override parts of the compilers specs and link using gcc.
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ifeq ($(RTEMS_USE_GCC272),yes)
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define make-exe
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$(LD) $(LDFLAGS) -N -T $(LINKCMDS) -o $(basename $@).nxe \
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$(START_FILE) $(LINK_OBJS) --start-group $(LINK_LIBS) --end-group
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$(OBJCOPY) -O srec $(basename $@).nxe $(basename $@).i
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$(SED) -e 's/.$$//' -e '/^S0/d' $(basename $@).i | \
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$(PACKHEX) > $(basename $@).exe
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$(NM) -g -n $(basename $@).nxe > $(basename $@).num
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$(SIZE) $(basename $@).nxe
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endef
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else
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define make-exe
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$(CC) $(CPPFLAGS) $(CFLAGS) $(CFLAGS_LD) -o $(basename $@).nxe \
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$(LINK_OBJS) $(LINK_LIBS)
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$(OBJCOPY) -O srec $(basename $@).nxe $(basename $@).i
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$(SED) -e 's/.$$//' -e '/^S0/d' $(basename $@).i | \
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$(PACKHEX) > $(basename $@).exe
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$(NM) -g -n $(basename $@).nxe > $(basename $@).num
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$(SIZE) $(basename $@).nxe
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endef
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endif
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# Miscellaneous additions go here
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