Refactor CMake build scripts

1. Use FeatureSummary module to show configuration results.

2. Invert option()/find_package() relationship: instead of
calling find_package(... REQUIRED) when option is set, rely on optional
find package call and PackageName_FOUND variable.

3. Refactor handling options that result in simple preprocessor defines
(actually copy the snippet from libtorrent) so that everything is done
in a single function call.

4. Populate target properties in order to get rid of
include_directories() calls.
This commit is contained in:
Eugene Shalygin 2018-06-05 03:03:38 +02:00 committed by sledgehammer999
commit bb893e70c5
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20 changed files with 313 additions and 353 deletions

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@ -99,6 +99,7 @@ list(FIND LibtorrentRasterbar_DEFINITIONS -DTORRENT_USE_OPENSSL LibtorrentRaster
if(LibtorrentRasterbar_ENCRYPTION_INDEX GREATER -1)
find_package(OpenSSL REQUIRED)
set(LibtorrentRasterbar_LIBRARIES ${LibtorrentRasterbar_LIBRARIES} OpenSSL::SSL OpenSSL::Crypto)
list(APPEND LibtorrentRasterbar_INCLUDE_DIRS "${OPENSSL_INCLUDE_DIR}")
set(LibtorrentRasterbar_OPENSSL_ENABLED ON)
endif()
@ -113,10 +114,10 @@ mark_as_advanced(LibtorrentRasterbar_INCLUDE_DIR LibtorrentRasterbar_LIBRARY
LibtorrentRasterbar_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES
LibtorrentRasterbar_ENCRYPTION_INDEX)
if (LibtorrentRasterbar_FOUND AND NOT TARGET LibtorrentRasterbar::LibTorrent)
add_library(LibtorrentRasterbar::LibTorrent UNKNOWN IMPORTED)
if (LibtorrentRasterbar_FOUND AND NOT TARGET LibtorrentRasterbar::torrent-rasterbar)
add_library(LibtorrentRasterbar::torrent-rasterbar UNKNOWN IMPORTED)
set_target_properties(LibtorrentRasterbar::LibTorrent PROPERTIES
set_target_properties(LibtorrentRasterbar::torrent-rasterbar PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
IMPORTED_LOCATION "${LibtorrentRasterbar_LIBRARY}"
INTERFACE_INCLUDE_DIRECTORIES "${LibtorrentRasterbar_INCLUDE_DIRS}"