On 07/01/2016 11:13 AM, Julien Schueller wrote:
I'm using find_package in no-module mode with the PATHS option to
provide a hard-coded guess to a path where a sublibrary 'hmat' was
previously found,
and with the NO_DEFAULT_PATH to not find it first in system directories.
find_package (HMAT REQUIRED NO_MODULE PATHS
<hmat-prefix>/lib/cmake/hmat NO_DEFAULT_PATH)
So far so good. Now I want to cross-compile with the usual toolchain file:
set (CMAKE_FIND_ROOT_PATH /usr/i686-w64-mingw32)
set (CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set (CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set (CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
...
This works wonderfully too.
But now I add CMAKE_FIND_ROOT_PATH_MODE_PACKAGE to ONLY in my
toolchain file to prevent detecting native libraries
set (CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
And now find_package fails to find my package!
I'm puzzled as I did not find in the doc something that explains why
the PATHS is ignored (step #8 in find_package):
https://cmake.org/cmake/help/v3.5/command/find_package.html#command:find_package
The given path "<hmat-prefix>/lib/cmake/hmat" is prefixed by the paths
in CMAKE_FIND_ROOT_PATH.
Which means that (given ONLY) cmake only looks for the package in
"/usr/i686-w64-mingw32/<hmat-prefix>/lib/cmake/hmat".
You might want to e.g. add <hmat-prefix> to CMAKE_FIND_ROOT_PATH and use
PATHS / instead.
Nils
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