It is not possible to include headers when compiling as a dependent project.

[Pichas]

Cannot include <sqlite3.h>, <sqlite3mc.h>... headers when compile as dependency.

My cmake file

option(SQLITE3MC_STATIC "Build SQLITE3MC as a static library" ON)
option(SQLITE3MC_BUILD_SHELL "Builds the SQLITE3MC Shell" OFF)
add_subdirectory(SQLite3MultipleCiphers)

add_executable(Proj main.cpp)
target_link_libraries(Proj PRIVATE sqlite3mc_static)

Proposed solution:

Make ${SQLITE3MC_INCLUDEDIRS} as public include directory or add a new option to expose headers

# L306
- target_include_directories(${SQLITE3MC_TARGET} PRIVATE
+target_include_directories(${SQLITE3MC_TARGET} PUBLIC
  ${SQLITE3MC_INCLUDEDIRS}
)

[utelle]

If the library is installed, the required headers are installed as well. Most projects that use SQlite3MC as a dependency usually include the amalgamation sources directly as part of the project.

My experiences with CMake are limited. In the Conan recipe the test application depends on the library and builds without any changes. So, I'm a bit irritated that it doesn't work for you.

[Pichas]

I neither install the library nor use conan, only pure cmake and fetching with FetchContent. The same behaviour if I use it as a git submodule.
Anyway I just create a small patch to apply inside FetchContent function. Thought it would be good to point on this issue.
Thanks!

[utelle]

I made the include directories public in commit 6209db9.