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<! Style Sheet Header>
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<html>
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<head>
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<title>configBuildFile.html</title>
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<! End Style Sheet Header -----------Insert Text Here --------------------->
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<center>
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<h1>Project Level BuildFiles</h1>
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<font color=red>S</font>oftware <font color=red>C</font>onfiguration,
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<font color=red>R</font>elease <font color=red>A</font>nd
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<font color=red>M</font>anagement
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</center>
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<hr>
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<h2>Purpose of the BuildFiles</h2>
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At the configuration level the BuildFile is generally used to set up project
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wide defaults and associate src code structure with building rules.
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<p>
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<h2>The main configuration BuildFile</h2>
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The file <em>config/BuildFile</em> is resourced by all others in the entire
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tree. It controls everything else. The most important thing to set here is the
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<ClassPath> tags which associate <a href=#Structural>Structure BuildFiles</a>
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with directory structure. You may also want to set project wide defaults.
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<p>
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<h3>Using the <ClassPath> tag</h3>
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This tag tells SCRAM which BuildFile to associate with a particular location in
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the src tree.<p>
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Format:<br>
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<ClassPath path=<em>[pattern_match]+BuildFileName/../....</em>>
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<p>
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<b>Example</b>
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<font color=green>
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<pre>
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<ClassPath path=+TopLevel/+SubSystem/+Package/src+library>
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<ClassPath path=+TopLevel/+SubSystem/+Package/test+UnitTest>
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</pre>
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</font>
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This will associate the top level src directory with the BuildFile
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<em>config/TopLevel_BuildFile</em> (or config/TopLevel_makefile.mk). Any
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directory in the next level below with <em>config/SubSystem_BuildFile</em>
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, the level below that with <em>config/Package_BuildFile</em>.
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The last element in the path has a pattern matching string before the +, thus
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only directories called <em>src</em> at the 3rd level below the top level
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will be mapped to <em>config/library_BuildFile</em>.
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The second tag in the BuildFile has the same structure except it maps
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directories called <em>test</em> at this level to
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<em>config/UnitTest_BuildFile</em>.
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Any that do not match a ClassPath will be
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mapped to DEFAULT_BuildFile (which must exist).
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<br>
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<p>
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In a case where multiple <ClassPath> tags are defined it is always the last
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one that matches the stated path that is taken.
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<h2>Structure BuildFiles</h2>
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These are the BuildFles that the <ClassPath> tags described above refer to.
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They must exist in the project configuration directory. Their purpose is
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to define default build behaviour and default settings that is to be associated
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with a location. The <Build> tag can be used here to specify build products
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Note that anything outside of tags is standard gmake.
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<p>
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<b>Example <em>library_BuildFile</em></b>
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<font color=green>
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<pre>
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# The called target is the name of the BuildFile
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library : lib
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# take packagename as being one directory up
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packagetemp=$(shell echo $(dir $(ClassDir)) | sed -e 's/\(.*\)\//\1/' )
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packagename=$(notdir $(packagetemp))
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# Pick Up some source files - exclude by setting skip_files in local BuildFile
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# $(LOCALTOP) and $(ClassDir) are defined by SCRAM - use like this point to
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# the current src directory location
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files:=$(notdir $(wildcard $(LOCALTOP)/$(ClassDir)/*.cc))
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files+=$(notdir $(wildcard $(LOCALTOP)/$(ClassDir)/*.c))
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files+=$(notdir $(wildcard $(LOCALTOP)/$(ClassDir)/*.cpp))
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files:=$(filter-out $(skip_files), $(files))
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# Build a library with the same name as the package from files
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<Build class=lib name="$(packagename)" src=$(files) default=shared_debug>
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</pre>
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</font>
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<! Style Sheet Footer ---------------Do not change anything after this line-->
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<hr>
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<table border=1 width=100%>
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<td align=left>
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<a href=mailto:Christopher.Williams@cern.ch
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>Chris Williams</a>
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</td>
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<td align=center>
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Last Updated Thu Jun 15 18:57:17 2000
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</td>
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