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efce9dbfe2
Adds the FindRequiredPackage() macro that wraps the functionality of the standard find_package() macro.
44 lines
1.5 KiB
CMake
44 lines
1.5 KiB
CMake
# A wrapper macro around the standard CMake find_package macro that
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# facilitates displaying better error messages by default, or even
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# accepting custom error messages on a per package basis.
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#
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# If a package is not found, then the MISSING_PREREQS variable gets
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# set to true and either a default or custom error message appended
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# to MISSING_PREREQ_DESCS.
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#
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# The caller can use these variables to display a list of any missing
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# packages and abort the build/configuration if there were any.
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#
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# Use as follows:
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#
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# include(FindRequiredPackage)
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# FindRequiredPackage(Perl)
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# FindRequiredPackage(FLEX "You need to install flex (Fast Lexical Analyzer)")
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#
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# if (MISSING_PREREQS)
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# foreach (prereq ${MISSING_PREREQ_DESCS})
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# message(SEND_ERROR ${prereq})
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# endforeach ()
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# message(FATAL_ERROR "Configuration aborted due to missing prerequisites")
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# endif ()
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macro(FindRequiredPackage packageName)
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find_package(${packageName})
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string(TOUPPER ${packageName} canonPackageName)
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if (NOT ${canonPackageName}_FOUND)
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set(MISSING_PREREQS true)
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set(customDesc)
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foreach (descArg ${ARGN})
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set(customDesc "${customDesc} ${descArg}")
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endforeach ()
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if (customDesc)
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# append the custom error message that was provided as an argument
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list(APPEND MISSING_PREREQ_DESCS ${customDesc})
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else ()
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list(APPEND MISSING_PREREQ_DESCS
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" Could not find prerequisite package '${packageName}'")
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endif ()
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endif ()
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endmacro(FindRequiredPackage)
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