[CMake] CMAKE_EXPORT_COMPILE_COMMANDS, compile_commands.json content

[Martin Weber]

Hi all,

in the generated compile_commands.json, what are the quoting rules in the 
command fields?
Apart from the fact that a quotation mark in json inside a value has to be 
escaped as *\"*, do the arguments in the command-field follow the shell-
escape rules or do they reflect the arguments passed to exec(1).

Seeing a line in my compile_commands.json starting with

"command": "/usr/bin/c++ -Dprojectname_ROOT_DIR=\\\"/home/username/workspace/
projectname\\\" 

is confusing. What exactly is the value of macro projectname_ROOT_DIR here? A 
string literal?

OTOH, the same line has

-DvtkFiltersFlowPaths_AUTOINIT=\"1(vtkFiltersParallelFlowPaths)\"

which I do recognize as a macro value of string literal type.

Background: My tool tries to get the macro definition from the  
compile_commands.json file [1]

TIA,
	Martin

[1] https://github.com/15knots/cmake4eclipse/issues/74

-- 
Cd wrttn wtht vwls s mch trsr.