[CMake] Variables not persisting with multiple projects

[Rolf Eike Beer]

Am 2012-08-01 08:53, schrieb Collin Eggert:
> Hello,
>
> I am working with cross-compiling code using CMake.  I am able to get
> the following CMakeLists.txt to work:
>
> # ----------
> SET(CMAKE_TOOLCHAIN_FILE ../toolchain/Prizm.cmake)
>
> project(example1)
> file(GLOB EXAMPLE1_SRC "src/example1/*.c*")
> add_executable(example1 ${EXAMPLE1_SRC})
> # ----------

Don't use file(GLOB) for source files. See the documentation.

> This works just fine, everything is fine when I watch the output of
> `make VERBOSE=1`.  Now, I need to compile multiple targets.  I tried
> the following:
>
> # ----------
> SET(CMAKE_TOOLCHAIN_FILE ../toolchain/Prizm.cmake)
>
> project(example1)
> project(example2)
>
> file(GLOB EXAMPLE1_SRC "src/example1/*.c*")
> file(GLOB EXAMPLE2_SRC "src/example2/*.c*")
>
> add_executable(example1 ${EXAMPLE1_SRC})
> add_executable(example2 ${EXAMPLE2_SRC})
> # ----------
>
> However, when I look at the readout from `make VERBOSE=1`, I notice
> that for one project, CMAKE_C_FLAGS/CMAKE_CXX_FLAGS/etc. are all set
> and are used when compiling.  When it gets the the other project,
> these variables are reset to being empty.  Below is the
> toolchain/Prizm.cmake file:

Just drop the second project call, you don't need it.

eike