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<p class=MsoNormal>I’m confused about the following documentation.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>The CMake FAQ section “How do I use a different
compiler?” states:<o:p></o:p></p>
<p class=MsoNormal>“Set the appropriate CMAKE_FOO_COMPILER variable(s) to
a valid compiler name or full path in a list file using set(). This must be
done before any language is set (ie before any project() or enable_language()
command).”<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I want to conditionally choose the compiler based on
platform. My CMakeList.txt contains code similar to the following:<o:p></o:p></p>
<p class=MsoNormal>cmake_minimum_required (VERSION 2.6)<o:p></o:p></p>
<p class=MsoNormal>if (CMAKE_SYSTEM_NAME STREQUAL "Platform1")<o:p></o:p></p>
<p class=MsoNormal> set (CMAKE_C_COMPILER cc1)<o:p></o:p></p>
<p class=MsoNormal> set (CMAKE_C_FLAGS –XYZ1)<o:p></o:p></p>
<p class=MsoNormal>elseif (CMAKE_SYSTEM_NAME STREQUAL "platform2")<o:p></o:p></p>
<p class=MsoNormal> set (CMAKE_C_COMPILER cc2)<o:p></o:p></p>
<p class=MsoNormal> set (CMAKE_C_FLAGS –XYZ2)<o:p></o:p></p>
<p class=MsoNormal>endif()<o:p></o:p></p>
<p class=MsoNormal>project(test)<o:p></o:p></p>
<p class=MsoNormal>…<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>However, before “project()” is called, the
CMAKE_SYSTEM_NAME appears undefined. When is CMAKE_SYSTEM_NAME defined?<o:p></o:p></p>
<p class=MsoNormal>Is another option available to switch on the system before “project()”
is invoked?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks.<o:p></o:p></p>
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