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Short Description of the "Host" (vs. "Unix") Build System
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---------------------------------------------------------
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7-30-96 -kuk-
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questions/comments please mailto:kasemir@atdiv.lanl.gov
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To build EPICS on the WIN32 architecture
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the "old" make-system using Makefile.Unix in each
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subdir and RULES.Host was not suitable because
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it is too much Unix-dependent.
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A "new" system using Makefile.Host and RULES.Host
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was used instead. This "host" system should work
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on all other architectures as well.
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The idea is that ALL architectures should be able to use
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the "host" system in future because.
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The syntax of the 'Host' Makefiles is described
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in 'Sample.Makefile.Host'. Any suggestions for a
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better syntax (in connection whith ideas how to
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implement this in RULES.Host!) are very welcome!
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To use it, only a few changes should be necessary:
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A) In CONFIG.<WIN32, sun4, hp700, ... whatever you are using>:
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1) Set
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BUILD_TYPE=Host
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instead of 'Unix'. This switches you over to using
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Makefile.Host instead of Makefile.Unix.
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2) Set ARCH_CLASS to the correct architecture class.
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(ARCH_CLASS used to be defined in the past, right now
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it seems it's only set for VxWorks targets, not hosts).
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ARCH_CLASS is used to define system-dependent
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CFLAGS, library contents etc. in Makefile.Host,
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so it should describe the general architecture,
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maybe
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WIN32 : this is the only one really supported in Makefile.Host by now
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BSD for sun4,
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SYSV for ??,
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Maybe this "general arch" is not sufficient, so we will
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end up using
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ARCH_CLASS=WIN32, sun4, hp700, ....
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as it used to be.
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3) Make sure that the following (new) macros are defined:
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CP =$(PERL) $(EPICS_BASE)/src/tools/cp.pl
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MV =$(PERL) $(EPICS_BASE)/src/tools/mv.pl
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RM =$(PERL) $(EPICS_BASE)/src/tools/rm.pl -f
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MKDIR=$(PERL) $(EPICS_BASE)/src/tools/mkdir.pl
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RMDIR=$(PERL) $(EPICS_BASE)/src/tools/rm.pl -rf
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or
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CP=cp
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MV=mv
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RM=rm -f
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MKDIR=mkdir
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RMDIR=rm -rf
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EXE=
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OBJ=.o
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4) LINK.c and LINK.cc must now include the target-flag, e.g.:
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LINK.c = $(CC) $(LDFLAGS) -o $@
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because the "-o $@" is also system dependent (it's -Fe$@ for WIN32)
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5) The bin directory for the host based epics tools
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$(EPICS)/base/bin/$(HOST_ARCH)
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must be in your PATH.
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B) Adjust Makefile.Host
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If you are trying to build EPICS now, there might be errors
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because the Makefile.Host files are only tested on WIN32, yet.
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If changes are necessare in some base/src/???/Makefile.Host,
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refer to Sample.Makefile.Host in the base/config dir.
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The current make-system for WIN32
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needs
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* gnumake (OK, sources for WIN32 are available)
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* perl (OK, sources for WIN32 are available)
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