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Merge pull request #328 from rolk/328_warn

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Issue a CMake warning if client project is incompatible
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Bård Skaflestad 2013-08-21 13:03:53 -07:00
commit 7b882ceaca
1 changed files with 8 additions and 0 deletions
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8
cmake/Modules/ConfigVars.cmake
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@ -75,6 +75,14 @@ function (configure_vars obj syntax filename verb)
set (_prev_verbatim TRUE)
else ("${_var}" MATCHES "^/[/*]")
# write a CMake statements that warns if the value has changed
if ("${syntax}" STREQUAL "CMAKE")
set (_db "\${") # to avoid parsing problems
file (APPEND "${filename}" "if (DEFINED ${_var} AND NOT \"${_db}${_var}}\" STREQUAL \"${${_var}}\")\n")
file (APPEND "${filename}" "\tmessage (WARNING \"Incompatible value \\\"${_db}${_var}}\\\" of variable \\\"${_var}\\\"\")\n")
file (APPEND "${filename}" "endif ()\n")
endif ()
# check for empty variable; variables that are explicitly set to false
# is not included in this clause