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Avoid opportunistic linkage against libdb and libicu.
diff -u -r ../libical-3.0.1/CMakeLists.txt ./CMakeLists.txt
--- ../libical-3.0.1/CMakeLists.txt 2017-11-19 14:32:53.000000000 +0000
+++ ./CMakeLists.txt 2017-12-08 23:54:59.745527096 +0000
@@ -154,47 +154,6 @@
set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS True)
endif()
-# libicu is highly recommended for RSCALE support
-# libicu can be found at http://www.icu-project.org
-# RSCALE info at http://tools.ietf.org/html/rfc7529
-find_package(ICU)
-set_package_properties(ICU PROPERTIES
- TYPE RECOMMENDED
- PURPOSE "For RSCALE (RFC7529) support"
-)
-add_feature_info(
- "RSCALE support (RFC7529)"
- ICU_FOUND
- "build in RSCALE support"
-)
-if(ICU_FOUND)
- set(REQUIRES_PRIVATE_ICU "Requires.private: icu-i18n") #for libical.pc
- set(HAVE_LIBICU 1)
- if(ICU_MAJOR_VERSION VERSION_GREATER 50)
- set(HAVE_ICU_DANGI TRUE)
- else()
- set(HAVE_ICU_DANGI FALSE)
- endif()
-endif()
-if(ICU_I18N_FOUND)
- set(HAVE_LIBICU_I18N 1)
-endif()
-
-# compile in Berkeley DB support
-find_package(BDB)
-set_package_properties(BDB PROPERTIES
- TYPE OPTIONAL
- PURPOSE "For Berkeley DB storage support"
-)
-add_feature_info(
- "Berkeley DB storage support"
- BDB_FOUND
- "build in support for Berkeley DB storage"
-)
-if(BDB_FOUND)
- set(HAVE_BDB True)
-endif()
-
# MSVC specific definitions
if(WIN32)
if(MSVC)