CMake: CMake config files are defining CURL_STATICLIB for static builds

This change allows to use the CMake config files generated by Curl's
CMake scripts for static builds of the library.
The symbol CURL_STATIC lib must be defined to compile downstream,
thus the config package is the perfect place to do so.

Fixes #2817
Closes #2823
Reported-by: adnn on github
Reviewed-by: Sergei Nikulov

diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 306ba1a6ea5aa9997c403524af2fe9e0d6532be8..87cbe8174cbc17d6b6d657482af9fb4003d8e312 100644 (file)
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -76,6 +76,10 @@ if(MSVC AND NOT BUILD_SHARED_LIBS)
   set_target_properties(${LIB_NAME} PROPERTIES STATIC_LIBRARY_FLAGS ${CMAKE_EXE_LINKER_FLAGS})
 endif()
 
+if(NOT BUILD_SHARED_LIBS)
+    set_target_properties(${LIB_NAME} PROPERTIES INTERFACE_COMPILE_DEFINITIONS CURL_STATICLIB)
+endif()
+
 target_link_libraries(${LIB_NAME} ${CURL_LIBS})
 
 if(WIN32)