[CMake] FIND_PATH with multiple path in a single variable

[frederic heem]

Alle 17:15, martedì 3 ottobre 2006, Brad King ha scritto:
> frederic heem wrote:
> > Hi,
> > Here is the problem, pkgconfig is used to get the include path, for dbus,
> > its value is "-I/usr/include/dbus-1.0 -I/usr/lib/dbus-1.0/include" and
> > the variable name is DBUS_INCLUDE_DIR_SYSTEM. The following FIND_PATH
> > fails to find the include files:
> > FIND_PATH(DBUS_INCLUDE_DIR dbus/dbus.h
> >   ${DBUS_INCLUDE_DIR_SYSTEM}
> > )
> >
> > Is it a known issue ?
>
> There are a few problems here.  First, paths are specified using the
> PATHS keyword:
>
> FIND_PATH(DBUS_INCLUDE_DIR dbus/dbus.h
>   PATHS ${DBUS_INCLUDE_DIR_SYSTEM}
>   )
>
Done, is it possible to emit a warning or an error if it is missing ? 
> Second, the output of pkgconfig cannot be used directly.  FIND_PATH does
> not recognize the string "-I/usr/include/dbus-1.0
> -I/usr/lib/dbus-1.0/include" as a list of search paths.  You have to use
> STRING(REGEX) to parse out the paths.  Once you have them you don't
> actually need FIND_PATH at all though.  Just set DBUS_INCLUDE_DIRS to
> the result.
>
FIND_PATH is used to make sure the include file exists, pkgconfig just gives 
the directory but doesn't verify if there any file in it. 
> -Brad


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