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Old 29 November 2019, 09:55   #1
sparhawk
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CMake and vasm

Are there any examples on how to write a cmake script to assemble a bunch of files into a binary?
Not sure if it is very different to create a project which consists only of assembler sources, versus a project which mixes gcc and also links assembler files.
Using gcc is simple enough, but I haven't found any info on how to build vasm sources, so I'm currently looking into how to write my own modules for cmake and it would be nice if there already exists something like that.
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Old 29 November 2019, 10:06   #2
Steril707
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What exactly do you want to accomplish?
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Old 29 November 2019, 11:41   #3
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Szenario 1:
Multiple asm files, built into an executable or library
Szenario 2:
gcc sources files mixed with asm source files.

If I can build a library, then szenario 2 is probably obsolete, because then one could always build a library anyway. Also I guess, if I can build asm files I should also be able to integrate it into a gcc project as well.

I wrote a small assembler source, and ocmpiled it manually, but I don't want to use this approach all the time.
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Old 29 November 2019, 11:45   #4
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It has to be CMake? I do this with gnu make fairly easily.
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Old 29 November 2019, 11:56   #5
sparhawk
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I can also do it with makefile, but I would prefer cmake, as I also use this for gcc builds.
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Old 29 November 2019, 13:50   #6
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Here is my CMakeLists.txt for a small project that mixes gcc and asm which assembles with vasm

Code:
cmake_minimum_required(VERSION 3.13)
project(make C ASM)

set(CMAKE_C_FLAGS_MINSIZEREL "-Os")

if (CMAKE_C_COMPILER STREQUAL "/opt/amiga/gcc6/bin/m68k-amigaos-gcc")
    #add_compile_options(-mcrt=nix13 -D_AMIGA -fbaserel -fomit-frame-pointer -msmall-code -Wall)
    #set(CMAKE_EXE_LINKER_FLAGS "-s -mcrt=nix13 -fbaserel -msmall-code" CACHE INTERNAL "" FORCE)
    add_compile_options(-mcrt=nix13 -fomit-frame-pointer -Wall)
    set(CMAKE_EXE_LINKER_FLAGS "-s -mcrt=nix13" CACHE INTERNAL "" FORCE)
    set(SRC_FILES file.c gomake.c make.c make.h reader.c mysystem.c system0.asm)
    set(XTRA_LIBS /opt/amiga/gcc6/m68k-amigaos/lib/libdebug.a)
    set(CMAKE_ASM_COMPILER /opt/amiga/gcc6/bin/vasmm68k_mot)
    set(CMAKE_ASM_FLAGS "-esc -nosym -kick1hunks -Fhunk")
    set(CMAKE_ASM_COMPILE_OBJECT "<CMAKE_ASM_COMPILER> ${CMAKE_ASM_FLAGS} -o <OBJECT> <SOURCE>")
    FIND_PROGRAM(CRANKER cranker_generic PATHS "/usr/local/bin")
    IF(CRANKER)
        SET(CRANKER_COMMAND ${CRANKER} -f ${CMAKE_CURRENT_BINARY_DIR}/make -o ${CMAKE_CURRENT_BINARY_DIR}/makec)
        SET(CRANKER_LS ls -l makec)
    ENDIF(CRANKER)
ELSE()
    set(SRC_FILES file.c gomake.c make.c make.h reader.c mysystem.c)
endif(CMAKE_C_COMPILER STREQUAL "/opt/amiga/gcc6/bin/m68k-amigaos-gcc")

set(CMAKE_C_STANDARD 11)

add_executable(make ${SRC_FILES})
target_link_libraries(make ${XTRA_LIBS})
include_directories(.)
#add_custom_command(TARGET make POST_BUILD COMMAND ls -l make)
add_custom_command(TARGET make
        POST_BUILD
        COMMAND ${CRANKER_COMMAND}
        COMMAND ls -l make
        COMMAND ${CRANKER_LS}
        )
#set(CMAKE_VERBOSE_MAKEFILE ON)
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Old 29 November 2019, 13:55   #7
sparhawk
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Thanks! Doesn't look so bad then.

Is your system0.asm a kind of crt0 startup code?
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Old 29 November 2019, 14:01   #8
alkis
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Quote:
Originally Posted by sparhawk View Post
Is your system0.asm a kind of crt0 startup code?
Nope, it's http://eab.abime.net/showpost.php?p=1360471&postcount=8
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Old 29 November 2019, 23:06   #9
sparhawk
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Thanks to your help, I finally managed to create cmake project with two source files.
I attached it, in case someting might find this usefull. This project is for pure asm, and wouldn't work with gcc, as it doesn't link the required libraries, so it's pretty bare bone.
Attached Files
File Type: zip VAsmCMake.zip (1.7 KB, 15 views)
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Old 30 November 2019, 21:04   #10
sparhawk
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I uploaded the project now in github.

It includes the above sample project which uses vasm only files, and another which contains an example of gcc C++ mingling with a vasm module.

https://github.com/skeetor/Amiga-programming-examples
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