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README.rst 0 → 100644
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==========
Vala CMake
==========
:Author:
Jakob Westhoff
:Version:
Draft
Overview
========
Vala CMake is a collection of macros for the CMake_ build system to allow the
creation and management of projects developed using the Vala_ programming
language or its "Genie" flavor (less tested).
Installation
============
To use the Vala macros in your own project you need to copy the macro files to
an arbitrary folder in your projects directory and reference them in your
``CMakeLists.txt`` file.
Assuming the macros are stored under ``cmake/vala`` in your projects folder you
need to add the following information to your base ``CMakeLists.txt``::
list(APPEND CMAKE_MODULE_PATH
${CMAKE_SOURCE_DIR}/cmake/vala
)
After the new module path as been added you can simply include the provided
modules or use the provided find routines.
Finding Vala
============
The find module for vala works like any other Find module in CMake.
You can use it by simply calling the usual ``find_package`` function. Default
parameters like ``REQUIRED`` and ``QUIETLY`` are supported.
::
find_package(Vala REQUIRED)
After a successful call to the find_package function the following variables
will be set:
VALA_FOUND
Whether the vala compiler has been found or not
VALA_EXECUTABLE
Full path to the valac executable if it has been found
VALA_VERSION
Version number of the available valac
Precompiling Vala sources
=========================
CMake is mainly supposed to handle c or c++ based projects. Luckily every vala
program is translated into plain c code using the vala compiler, followed by
normal compilation of the generated c program using gcc.
The macro ``vala_precompile`` uses that fact to create c files from your .vala
sources for further CMake processing.
The first parameter provided is a variable, which will be filled with a list of
c files outputted by the vala compiler. This list can than be used in
conjunction with functions like ``add_executable`` or others to create the
necessary compile rules with CMake.
The initial variable is followed by a list of .vala files to be compiled.
Please take care to add every vala file belonging to the currently compiled
project or library as Vala will otherwise not be able to resolve all
dependencies.
The following sections may be specified afterwards to provide certain options
to the vala compiler:
PACKAGES
A list of vala packages/libraries to be used during the compile cycle. The
package names are exactly the same, as they would be passed to the valac
"--pkg=" option.
OPTIONS
A list of optional options to be passed to the valac executable. This can be
used to pass "--thread" for example to enable multi-threading support.
DIRECTORY
Specify the directory where the output source files will be stored. If
ommitted, the source files will be stored in CMAKE_CURRENT_BINARY_DIR.
CUSTOM_VAPIS
A list of custom vapi files to be included for compilation. This can be
useful to include freshly created vala libraries without having to install
them in the system.
GENERATE_VAPI
Pass all the needed flags to the compiler to create an internal vapi for
the compiled library. The provided name will be used for this and a
<provided_name>.vapi file will be created.
GENERATE_HEADER
Let the compiler generate a header file for the compiled code. There will
be a header file as well as an internal header file being generated called
<provided_name>.h and <provided_name>_internal.h
The following call is a simple example to the vala_precompile macro showing an
example to every of the optional sections::
vala_precompile(VALA_C
source1.vala
source2.vala
source3.vala
PACKAGES
gtk+-2.0
gio-1.0
posix
OPTIONS
--thread
CUSTOM_VAPIS
some_vapi.vapi
GENERATE_VAPI
myvapi
GENERATE_HEADER
myheader
)
Most important is the variable VALA_C which will contain all the generated c
file names after the call. The easiest way to use this information is to tell
CMake to create an executable out of it.
::
add_executable(myexecutable ${VALA_C})
Building a debug build
======================
In the section OPTIONS add the '-g' option. This will instruct the Vala compiler
to include the Vala source code line information in the compiled binary. Add the
'--save-temps' option to keep the temporary C source files.
When running cmake add '-DCMAKE_BUILD_TYPE=Debug' option. After building the
program, it can then be debugged with ``gdb`` or ``nemiver``.
Further reading
===============
The `Pdf Presenter Console`__ , which is a vala based project of mine, makes
heavy usage of the here described macros. To look at a real world example of
these macros the mentioned project is the right place to take a look. The svn
trunk of it can be found at::
svn://pureenergy.cc/pdf_presenter_console/trunk
__ http://westhoffswelt.de/projects/pdf_presenter_console.html
Acknowledgments
===============
Thanks go out to Florian Sowade, a fellow local PHP-Usergroupie, who helped me
a lot with the initial version of this macros and always answered my mostly
dumb CMake questions.
.. _CMake: http://cmake.org
.. _Vala: http://live.gnome.org/Vala
.. _Genie: http://live.gnome.org/Genie
..
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##
# Find module for the Vala compiler (valac)
#
# This module determines wheter a Vala compiler is installed on the current
# system and where its executable is.
#
# Call the module using "find_package(Vala) from within your CMakeLists.txt.
#
# The following variables will be set after an invocation:
#
# VALA_FOUND Whether the vala compiler has been found or not
# VALA_EXECUTABLE Full path to the valac executable if it has been found
# VALA_VERSION Version number of the available valac
# VALA_USE_FILE Include this file to define the vala_precompile function
##
##
# Copyright 2009-2010 Jakob Westhoff. All rights reserved.
# Copyright 2010-2011 Daniel Pfeifer
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY JAKOB WESTHOFF ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL JAKOB WESTHOFF OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# The views and conclusions contained in the software and documentation are those
# of the authors and should not be interpreted as representing official policies,
# either expressed or implied, of Jakob Westhoff
##
# Search for the valac executable in the usual system paths
# Some distributions rename the valac to contain the major.minor in the binary name
find_program(VALA_EXECUTABLE NAMES valac valac-0.20 valac-0.18 valac-0.16 valac-0.14 valac-0.12 valac-0.10)
mark_as_advanced(VALA_EXECUTABLE)
# Determine the valac version
if(VALA_EXECUTABLE)
execute_process(COMMAND ${VALA_EXECUTABLE} "--version"
OUTPUT_VARIABLE VALA_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE)
string(REPLACE "Vala " "" VALA_VERSION "${VALA_VERSION}")
endif(VALA_EXECUTABLE)
# Handle the QUIETLY and REQUIRED arguments, which may be given to the find call.
# Furthermore set VALA_FOUND to TRUE if Vala has been found (aka.
# VALA_EXECUTABLE is set)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Vala
REQUIRED_VARS VALA_EXECUTABLE
VERSION_VAR VALA_VERSION)
set(VALA_USE_FILE "${CMAKE_CURRENT_LIST_DIR}/UseVala.cmake")
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##
# Compile vala files to their c equivalents for further processing.
#
# The "vala_precompile" function takes care of calling the valac executable on
# the given source to produce c files which can then be processed further using
# default cmake functions.
#
# The first parameter provided is a variable, which will be filled with a list
# of c files outputted by the vala compiler. This list can than be used in
# conjuction with functions like "add_executable" or others to create the
# neccessary compile rules with CMake.
#
# The following sections may be specified afterwards to provide certain options
# to the vala compiler:
#
# SOURCES
# A list of .vala files to be compiled. Please take care to add every vala
# file belonging to the currently compiled project or library as Vala will
# otherwise not be able to resolve all dependencies.
#
# PACKAGES
# A list of vala packages/libraries to be used during the compile cycle. The
# package names are exactly the same, as they would be passed to the valac
# "--pkg=" option.
#
# OPTIONS
# A list of optional options to be passed to the valac executable. This can be
# used to pass "--thread" for example to enable multi-threading support.
#
# DEFINITIONS
# A list of symbols to be used for conditional compilation. They are the same
# as they would be passed using the valac "--define=" option.
#
# CUSTOM_VAPIS
# A list of custom vapi files to be included for compilation. This can be
# useful to include freshly created vala libraries without having to install
# them in the system.
#
# GENERATE_VAPI
# Pass all the needed flags to the compiler to create a vapi for
# the compiled library. The provided name will be used for this and a
# <provided_name>.vapi file will be created.
#
# GENERATE_HEADER
# Let the compiler generate a header file for the compiled code. There will
# be a header file as well as an internal header file being generated called
# <provided_name>.h and <provided_name>_internal.h
#
# The following call is a simple example to the vala_precompile macro showing
# an example to every of the optional sections:
#
# find_package(Vala "0.12" REQUIRED)
# include(${VALA_USE_FILE})
#
# vala_precompile(VALA_C
# SOURCES
# source1.vala
# source2.vala
# source3.vala
# PACKAGES
# gtk+-2.0
# gio-1.0
# posix
# DIRECTORY
# gen
# OPTIONS
# --thread
# CUSTOM_VAPIS
# some_vapi.vapi
# GENERATE_VAPI
# myvapi
# GENERATE_HEADER
# myheader
# )
#
# Most important is the variable VALA_C which will contain all the generated c
# file names after the call.
##
##
# Copyright 2009-2010 Jakob Westhoff. All rights reserved.
# Copyright 2010-2011 Daniel Pfeifer
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY JAKOB WESTHOFF ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL JAKOB WESTHOFF OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# The views and conclusions contained in the software and documentation are those
# of the authors and should not be interpreted as representing official policies,
# either expressed or implied, of Jakob Westhoff
##
include(CMakeParseArguments)
function(vala_precompile output)
cmake_parse_arguments(ARGS "" "DIRECTORY;GENERATE_HEADER;GENERATE_VAPI"
"SOURCES;PACKAGES;OPTIONS;DEFINITIONS;CUSTOM_VAPIS" ${ARGN})
if(ARGS_DIRECTORY)
get_filename_component(DIRECTORY ${ARGS_DIRECTORY} ABSOLUTE)
else(ARGS_DIRECTORY)
set(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
endif(ARGS_DIRECTORY)
include_directories(${DIRECTORY})
set(vala_pkg_opts "")
foreach(pkg ${ARGS_PACKAGES})
list(APPEND vala_pkg_opts "--pkg=${pkg}")
endforeach(pkg ${ARGS_PACKAGES})
set(vala_define_opts "")
foreach(def ${ARGS_DEFINTIONS})
list(APPEND vala_define_opts "--define=${def}")
endforeach(def ${ARGS_DEFINTIONS})
set(in_files "")
set(out_files "")
foreach(src ${ARGS_SOURCES} ${ARGS_UNPARSED_ARGUMENTS})
list(APPEND in_files "${CMAKE_CURRENT_SOURCE_DIR}/${src}")
string(REPLACE ".vala" ".c" src ${src})
string(REPLACE ".gs" ".c" src ${src})
set(out_file "${DIRECTORY}/${src}")
list(APPEND out_files "${DIRECTORY}/${src}")
endforeach(src ${ARGS_SOURCES} ${ARGS_UNPARSED_ARGUMENTS})
set(custom_vapi_arguments "")
if(ARGS_CUSTOM_VAPIS)
foreach(vapi ${ARGS_CUSTOM_VAPIS})
if(${vapi} MATCHES ${CMAKE_SOURCE_DIR} OR ${vapi} MATCHES ${CMAKE_BINARY_DIR})
list(APPEND custom_vapi_arguments ${vapi})
else (${vapi} MATCHES ${CMAKE_SOURCE_DIR} OR ${vapi} MATCHES ${CMAKE_BINARY_DIR})
list(APPEND custom_vapi_arguments ${CMAKE_CURRENT_SOURCE_DIR}/${vapi})
endif(${vapi} MATCHES ${CMAKE_SOURCE_DIR} OR ${vapi} MATCHES ${CMAKE_BINARY_DIR})
endforeach(vapi ${ARGS_CUSTOM_VAPIS})
endif(ARGS_CUSTOM_VAPIS)
set(vapi_arguments "")
if(ARGS_GENERATE_VAPI)
list(APPEND out_files "${DIRECTORY}/${ARGS_GENERATE_VAPI}.vapi")
set(vapi_arguments "--vapi=${ARGS_GENERATE_VAPI}.vapi")
# Header and internal header is needed to generate internal vapi
if (NOT ARGS_GENERATE_HEADER)
set(ARGS_GENERATE_HEADER ${ARGS_GENERATE_VAPI})
endif(NOT ARGS_GENERATE_HEADER)
endif(ARGS_GENERATE_VAPI)
set(header_arguments "")
if(ARGS_GENERATE_HEADER)
list(APPEND out_files "${DIRECTORY}/${ARGS_GENERATE_HEADER}.h")
list(APPEND out_files "${DIRECTORY}/${ARGS_GENERATE_HEADER}_internal.h")
list(APPEND header_arguments "--header=${DIRECTORY}/${ARGS_GENERATE_HEADER}.h")
list(APPEND header_arguments "--internal-header=${DIRECTORY}/${ARGS_GENERATE_HEADER}_internal.h")
endif(ARGS_GENERATE_HEADER)
add_custom_command(OUTPUT ${out_files}
COMMAND
${VALA_EXECUTABLE}
ARGS
"-C"
${header_arguments}
${vapi_arguments}
"-b" ${CMAKE_CURRENT_SOURCE_DIR}
"-d" ${DIRECTORY}
${vala_pkg_opts}
${vala_define_opts}
${ARGS_OPTIONS}
${in_files}
${custom_vapi_arguments}
DEPENDS
${in_files}
${ARGS_CUSTOM_VAPIS}
)
set(${output} ${out_files} PARENT_SCOPE)
endfunction(vala_precompile)
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