Brandon J. Van Every wrote:
I tried various permutations of -P -DMYVAR:STRING=myfilename.scm and
it doesn't work. So I suppose I'll be copying to some local files and
using -E copy_if_different as a final step.
Lacking arguments, I also had to pass variables via a file and then
INCLUDE it. My final solution uses 3 files: CMakeLists.txt,
scm_vars.cmake.in, and scm_regex.cmake.
CMakeLists.txt:
---------------
MACRO(GEN_CSC_SCM)
CONFIGURE_FILE(${Chicken_SOURCE_DIR}/csc_vars.cmake.in
${CMAKE_CURRENT_BINARY_DIR}/csc_vars.cmake)
ADD_CUSTOM_COMMAND(
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/csc.scm
MAIN_DEPENDENCY ${Chicken_SOURCE_DIR}/csc.scm.in
DEPENDS
${CMAKE_CURRENT_BINARY_DIR}/csc_vars.cmake
${Chicken_SOURCE_DIR}/csc_regex.cmake
COMMAND ${CMAKE_COMMAND} -P ${Chicken_SOURCE_DIR}/csc_regex.cmake
)
ENDMACRO(GEN_CSC_SCM)
csc_vars.cmake.in:
------------------
SET(Chicken_SOURCE_DIR ${Chicken_SOURCE_DIR})
SET(CMAKE_CURRENT_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
# SET whatever specific vars are needed
csc_regex.cmake:
----------------
INCLUDE(${CMAKE_SOURCE_DIR}/csc_vars.cmake)
# Now we have some of the usual variables we're expecting to have.
MESSAGE(STATUS "Regexing ${Chicken_SOURCE_DIR}/csc.scm.in to
${CMAKE_CURRENT_BINARY_DIR}/csc.scm")
FILE(READ ${Chicken_SOURCE_DIR}/csc.scm.in input)
# Do the regex here
FILE(WRITE ${CMAKE_CURRENT_BINARY_DIR}/csc.scm "${input}")
It would be a lot cleaner if CONFIGURE_FILE was capable of more
intelligence. Doing regex replacements is an exceedingly common
operation when porting from a ./configure script. I think potential
converts will be a lot happier if they can keep their sed equivalents
inside CMakeLists.txt.
Cheers,
Brandon Van Every
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