On 15. Aug, 2009, at 14:00, Darius Blaszyk wrote:
On Sat, 2009-08-15 at 11:05 +0200, Michael Wild wrote:
On 15. Aug, 2009, at 10:21, Darius Blaszyk wrote:
My application links an object file in. This objectfile is not a c+
+ -
code file but some other file that needs to be linked in. The
problem I
have now is that each time I change this file I need to run the
linker
from a shell script manually and only then I can issue a make
command.
Is there a way to automate that? In other words can cmake do an
execute_process before attempting to compile my application if I
issue a
make?
Regards, Darius
Have a look at ADD_CUSTOM_COMMAND(TARGET PRE_LINK ...)
Michael
I did a test, but the make process complained "Cannot find source file
myobj.o". Which seems to be logical because the .o file needs to be
created first by ADD_CUSTOM_COMMAND.
What I have now is:
ADD_CUSTOM_COMMAND(TARGET mytest_gui PRE_LINK COMMAND ld -r -b
binary -o
mytest_glade.o mytest.glade)
ADD_CUSTOM_COMMAND(TARGET mytest_gui PRE_LINK COMMAND objcopy
--rename-section .data=.rodata,alloc,load,readonly,data,contents
mytest_glade.o mytest_glade.o)
ADD_EXECUTABLE(mytest_gui main.cpp mytest_glade.o)
TARGET_LINK_LIBRARIES(mytest_gui ${GTKMM_LIBRARIES})
This obviously does not work because of a missing mytest_glade.o, but
how to circumvent that?
Darius
Well then, how do you create the mytest_glade.o in the first place
(say, without CMake)?
Besides, you are adding two custom commands in the PRE_LINK stage to a
target, both operating on the same file. However, their execution
order is not specified. Am I assuming correctly, that you are using
the "ld -r -b" command to create a "resource file" from the glade file
which you then link into your binary (I never do such "crazy" stuff,
hence the question)? I probably would do that like this:
-- >8 --
set( GLADE_BIN_RSRC ${CMAKE_CURRENT_BINARY_DIR}$
{CMAKE_FILES_DIRECTORY}/mytest_gui.dir/mytest_glade.o )
add_custom_command( OUTPUT ${GLADE_BIN_RSRC}
COMMAND ld -r -b binary -o ${GLADE_BIN_RSRC} $
{CMAKE_CURRENT_SOURCE_DIR}/mytest.glade
COMMAND objcopy --rename-
section .data=.rodata,alloc,load,readonly,data,contents $
{GLADE_BIN_RSRC} ${GLADE_BIN_RSRC}
DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/mytest.glade
COMMENT "Creating resource file ${GLADE_BIN_RSRC}
VERBATIM
)
add_executable( mytest_gui main.cpp ${GLADE_BIN_RSRC} )
-- 8< --
This specifies a single rule how to generate the mytest_glade.o file
from the mytest.glade and then simply adds it to the add_executable
call. CMake now knows that mytest_gui depends on mytest_glade.o, and
also how to create it from mytest.glade.
HTH and works
Michael
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