I was able to get CMake to generate the Makefile using the FILE(WRITE) command:
file(WRITE ${MAKE_FILE}
"ARCHS=" ${ARCHS} "\n"
"APPLICATION_NAME = " ${PROJECT_NAME} "\n"
${PROJECT_NAME} "_FILES = " ${IOS_SOURCES} "\n"
${PROJECT_NAME} "_FRAMEWORKS = " ${FRAMEWORK_DEPS} "\n\n"
"include ${THEOS_PATH}/makefiles/common.mk\n"
"include ${THEOS_PATH}/makefiles/application.mk"
)
I also made an empty toolchain so that CMake didn't spend time configuring compilers for my system.
set (CMAKE_SYSTEM_NAME Generic)
# Just point to anything that exists.
# We don't need CMake to generate proper build files.
set(CMAKE_C_COMPILER ${CMAKE_CURRENT_SOURCE_DIR})
set(CMAKE_CXX_COMPILER ${CMAKE_CURRENT_SOURCE_DIR})
# Skip the platform compiler checks
set (CMAKE_CXX_COMPILER_WORKS TRUE)
set (CMAKE_C_COMPILER_WORKS TRUE)