fixes for asciidoc

This commit is contained in:
ttroy50
2015-11-22 01:36:29 +00:00
parent d373b5a8fd
commit f3113829b7
7 changed files with 330 additions and 32 deletions

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:toc:
:toc-placement!:
toc::[]
[[hello-cmake]]
Hello CMake
-----------
Shows a very basic hello world example.
[[concepts]]
Concepts
~~~~~~~~
[[minimum-cmake-version]]
Minimum CMake version
^^^^^^^^^^^^^^^^^^^^^
[source,cmake]
When creating a project using CMake, you can specify the minimum version
of CMake that is supported.
----
cmake_minimum_required(VERSION 2.6)
----
[[projects]]
Projects
^^^^^^^^
A CMake build can include a project name to make referencing certain
variables easier when using multiple projects.
[source,cmake]
----
project (hello_cmake)
----
[[creating-an-executable]]
Creating an Executable
^^^^^^^^^^^^^^^^^^^^^^
The +add_executable()+ command specifies that an executable should be
build from the specified source files, in this example main.cpp. The
first argument to the +add_executable()+ function is the name of the
executable to be built, and the second argument is the list of source files to compile.
[source,cmake]
----
add_executable(hello_cmake main.cpp)
----
[NOTE]
====
A shorthand that some people use is to have the project name and
executable name the same. This allows you to specify the CMakeLists.txt
as follows,
[source,cmake]
----
cmake_minimum_required(VERSION 2.6)
project (hello_cmake)
add_executable(${PROJECT_NAME} main.cpp)
----
In this example, the +project()+ function, will create a variable
+${PROJECT_NAME}+ with the value hello_cmake. This can then be passed to
the +add_executable()+ function to output a 'hello_cmake' executable.
====
[[building-the-example]]
Building the Example
~~~~~~~~~~~~~~~~~~~~
[source,bash]
----
$ mkdir build
$ cd build
$ cmake ..
-- The C compiler identification is GNU 4.8.4
-- The CXX compiler identification is GNU 4.8.4
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Configuring done
-- Generating done
-- Build files have been written to: /workspace/cmake-examples/01-basic/hello_cmake/build
$ make
Scanning dependencies of target hello_cmake
[100%] Building CXX object CMakeFiles/hello_cmake.dir/hello_cmake.cpp.o
Linking CXX executable hello_cmake
[100%] Built target hello_cmake
$ ./hello_cmake
Hello CMake!
----

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:toc:
:toc-placement!:
toc::[]
[[hello-cmake]]
Hello CMake
-----------
Shows a hello world example, which uses a different folder for source and include
files.
[[concepts]]
Concepts
~~~~~~~~
[[directory-paths]]
Directory Paths
^^^^^^^^^^^^^^^
CMake syntax specifies a number of https://cmake.org/Wiki/CMake_Useful_Variables[variables]
which can be used to help find useful directories in your project or source tree.
Some of these include:
[cols=",",options="header",]
|=======================================================================
|Variable |Info
|CMAKE_SOURCE_DIR |The root source directory
|CMAKE_CURRENT_SOURCE_DIR |The current source directory if using
sub-projects and directories
|PROJECT_SOURCE_DIR |The source director of the current cmake project.
|CMAKE_BINARY_DIR |The root binary / build directory. This is the
directory you run the cmake command from
|CMAKE_CURRENT_BINARY_DIR |The build directory you are currently in.
|PROJECT_BINARY_DIR |The build directory for the current project.
|=======================================================================
[[including-directories]]
Including Directories
^^^^^^^^^^^^^^^^^^^^^
When you have different include folders, you can make your compiler aware of them using the
+include_directories()+ function. This will add these directories to the
compiler with the -I flag e.g. `-I/directory/path`
[source,cmake]
----
include_directories(
${PROJECT_SOURCE_DIR}/inc
)
----
[[setting-source-files]]
Source Files Variable
^^^^^^^^^^^^^^^^^^^^
Creating a variable which includes the source files allows you to be
clearer about these files and easily add them to multiple commands, for example,
the +add_executable()+ function.
[source,cmake]
----
# Create a sources variable with a link to all cpp files to compile
set(SOURCES
src/Hello.cpp
src/main.cpp
)
add_executable(${PROJECT_NAME} ${SOURCES})
----
[NOTE]
====
An alternative to setting specific file names in the +SOURCES+ variable is
to use a GLOB command to find files using wildcard pattern matching.
[source,cmake]
----
file(GLOB SOURCES "src/*.cpp")
----
====
[[building-the-example]]
Building the Example
~~~~~~~~~~~~~~~~~~~~
[source,bash]
----
$ mkdir build
$ cd build
$ cmake ..
-- The C compiler identification is GNU 4.8.4
-- The CXX compiler identification is GNU 4.8.4
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/matrim/workspace/cmake-examples/01-basic/hello_headers/build
$ make
Scanning dependencies of target hello_headers
[ 50%] Building CXX object CMakeFiles/hello_headers.dir/src/Hello.cpp.o
[100%] Building CXX object CMakeFiles/hello_headers.dir/src/main.cpp.o
Linking CXX executable hello_headers
[100%] Built target hello_headers
$ ./hello_headers
Hello Headers!
----
[[verbose-output]]
Verbose Output
^^^^^^^^^^^^^^
In the previous examples, when running the make command the output only
shows the status of the build. To see the full output for debugging
purposes you can add +VERBOSE=1+ flag when running make.
The VERBOSE output is show below, and a examination of the output shows
the include directories being added to the c++ compiler command.
[source,bash]
----
$ make clean
$ make VERBOSE=1
/usr/bin/cmake -H/home/matrim/workspace/cmake-examples/01-basic/hello_headers -B/home/matrim/workspace/cmake-examples/01-basic/hello_headers/build --check-build-system CMakeFiles/Makefile.cmake 0
/usr/bin/cmake -E cmake_progress_start /home/matrim/workspace/cmake-examples/01-basic/hello_headers/build/CMakeFiles /home/matrim/workspace/cmake-examples/01-basic/hello_headers/build/CMakeFiles/progress.marks
make -f CMakeFiles/Makefile2 all
make[1]: Entering directory `/home/matrim/workspace/cmake-examples/01-basic/hello_headers/build'
make -f CMakeFiles/hello_headers.dir/build.make CMakeFiles/hello_headers.dir/depend
make[2]: Entering directory `/home/matrim/workspace/cmake-examples/01-basic/hello_headers/build'
cd /home/matrim/workspace/cmake-examples/01-basic/hello_headers/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/matrim/workspace/cmake-examples/01-basic/hello_headers /home/matrim/workspace/cmake-examples/01-basic/hello_headers /home/matrim/workspace/cmake-examples/01-basic/hello_headers/build /home/matrim/workspace/cmake-examples/01-basic/hello_headers/build /home/matrim/workspace/cmake-examples/01-basic/hello_headers/build/CMakeFiles/hello_headers.dir/DependInfo.cmake --color=
make[2]: Leaving directory `/home/matrim/workspace/cmake-examples/01-basic/hello_headers/build'
make -f CMakeFiles/hello_headers.dir/build.make CMakeFiles/hello_headers.dir/build
make[2]: Entering directory `/home/matrim/workspace/cmake-examples/01-basic/hello_headers/build'
/usr/bin/cmake -E cmake_progress_report /home/matrim/workspace/cmake-examples/01-basic/hello_headers/build/CMakeFiles 1
[ 50%] Building CXX object CMakeFiles/hello_headers.dir/src/Hello.cpp.o
/usr/bin/c++ -I/home/matrim/workspace/cmake-examples/01-basic/hello_headers/inc -o CMakeFiles/hello_headers.dir/src/Hello.cpp.o -c /home/matrim/workspace/cmake-examples/01-basic/hello_headers/src/Hello.cpp
/usr/bin/cmake -E cmake_progress_report /home/matrim/workspace/cmake-examples/01-basic/hello_headers/build/CMakeFiles 2
[100%] Building CXX object CMakeFiles/hello_headers.dir/src/main.cpp.o
/usr/bin/c++ -I/home/matrim/workspace/cmake-examples/01-basic/hello_headers/inc -o CMakeFiles/hello_headers.dir/src/main.cpp.o -c /home/matrim/workspace/cmake-examples/01-basic/hello_headers/src/main.cpp
Linking CXX executable hello_headers
/usr/bin/cmake -E cmake_link_script CMakeFiles/hello_headers.dir/link.txt --verbose=1
/usr/bin/c++ CMakeFiles/hello_headers.dir/src/Hello.cpp.o CMakeFiles/hello_headers.dir/src/main.cpp.o -o hello_headers -rdynamic
make[2]: Leaving directory `/home/matrim/workspace/cmake-examples/01-basic/hello_headers/build'
/usr/bin/cmake -E cmake_progress_report /home/matrim/workspace/cmake-examples/01-basic/hello_headers/build/CMakeFiles 1 2
[100%] Built target hello_headers
make[1]: Leaving directory `/home/matrim/workspace/cmake-examples/01-basic/hello_headers/build'
/usr/bin/cmake -E cmake_progress_start /home/matrim/workspace/cmake-examples/01-basic/hello_headers/build/CMakeFiles 0
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:toc:
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toc::[]
[[static-analysis]]
Static Analysis
---------------
@@ -20,4 +25,3 @@ analysis tool. However standalone tools also exist.
The examples here include using the following tools:
* http://cppcheck.sourceforge.net/[CppCheck]

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@@ -1,12 +1,21 @@
:toc:
:toc-placement!:
toc::[]
[[cppcheck-static-analysis]]
CppCheck Static Analysis
------------------------
This example is for calling the
This example shows how to call the
http://cppcheck.sourceforge.net/[CppCheck] tool to do static analysis.
It shows how to add cppcheck with a target for each sub-projects and
also how to generate an overall "make analysis" target to do static
It includes code to
* Find the cppcheck binary
* Add cppcheck with a target for each sub-projects
* Generate an overall `make analysis` target to do static
analysis on all sub-projects.
[[requirements]]
@@ -33,19 +42,23 @@ Adding Custom Package Modules
Adding a custom module
++++++++++++++++++++++
The cmake/modules/FindCppCheck.cmake file contains the code to find and
add variables for a custom package module. Custom modules can be used to
include::cmake/modules/FindCppCheck.cmake
The `cmake/modules/FindCppCheck.cmake` file contains the code to initialise a
custom package module. Custom modules can be used to
find programs, libraries and header files to include in your program.
[source,cmake]
The following is a breakdown of the file:
[source,cmake,numbered]
----
find_program(CPPCHECK_BIN NAMES cppcheck)
----
Search the path for the program "cppcheck" and store the result in the
CPPCHECK_BIN variable
Search the path for the cppcheck binary. Once found store the result in the
+CPPCHECK_BIN+ variable
[source,cmake]
[source,cmake,numbered]
----
set (CPPCHECK_THREADS "-j 4" CACHE STRING "The -j argument to have cppcheck use multiple threads / cores")
@@ -58,14 +71,14 @@ Set some custom arguments that can be later passed to cppcheck.
----
include(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(
CPPCHECK
DEFAULT_MSG
CPPCHECK
DEFAULT_MSG
CPPCHECK_BIN
CPPCHECK_THREADS
CPPCHECK_ARG)
mark_as_advanced(
CPPCHECK_BIN
CPPCHECK_BIN
CPPCHECK_THREADS
CPPCHECK_ARG)
----
@@ -84,7 +97,7 @@ set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/modules
${CMAKE_MODULE_PATH})
----
The $\{CMAKE_MODULE_PATH} points towards a folder which contains custom
The variable +${CMAKE_MODULE_PATH}+ points towards a folder which contains custom
cmake modules.
To then add the package module you can call
@@ -111,7 +124,7 @@ set(ALL_ANALYSIS_TARGETS "${ALL_ANALYSIS_TARGETS}" PARENT_SCOPE)
add_analysis macro
^^^^^^^^^^^^^^^^^^
The add_analysis macro in cmake/analysis.cmake is the core idea for this
The +add_analysis()+ macro in `cmake/analysis.cmake` is the core idea for this
example. If cppcheck is available then a list of arguments are compiled
and added to a custom command that calls cppcheck on the sources. These
are then added to a custom target.
@@ -124,7 +137,7 @@ foreach(dir ${dirs})
endforeach()
----
Find the include files from and calls to include_directories() in the
Find the include files from and calls to +include_directories()+ in the
same project.
[source,cmake]
@@ -134,19 +147,19 @@ set(ALL_ANALYSIS_TARGETS "${ALL_ANALYSIS_TARGETS}" PARENT_SCOPE)
----
Export the target name into a variable that can later be used to add a
global "make analysis" target.
global `make analysis` target.
[source,cmake]
----
if (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VESION} GREATER 2.7)
separate_arguments(tmp_args UNIX_COMMAND ${CPPCHECK_ARG})
else ()
# cmake 2.6 has different arguments
string(REPLACE " " ";" tmp_args ${CPPCHECK_ARG})
# cmake 2.6 has different arguments
string(REPLACE " " ";" tmp_args ${CPPCHECK_ARG})
endif ()
----
Change the CPPCHECK_ARG so that the can be added to command correctly in
Change the +CPPCHECK_ARG+ so that the can be added to command correctly in
the custom command.
[source,cmake]
@@ -174,7 +187,7 @@ you have provided. The sources that are analysed come from a _sources
variable. This should be the name of the variable which holds your list
of source files.
To call the add_analysis marco add the following to your projects
To call the +add_analysis()+ marco add the following to your projects
CMakeLists.txt file:
[source,cmake]
@@ -188,20 +201,20 @@ Creating a target to call other targets
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
In the root CMakeLists.txt a custom target is created, which will call
all other analysis targets. This allows you to call "make analysis" and
all other analysis targets. This allows you to call `make analysis` and
scan all sub projects.
To achieve this 2 things should be added to the root CMakeLists.txt
First add an empty variable ALL_ANALYSIS_TARGETS before calling your
add_subdirectories() function.
First add an empty variable +ALL_ANALYSIS_TARGETS+ before calling your
+add_subdirectories()+ function.
[source,cmake]
----
set (ALL_ANALYSIS_TARGETS)
----
Second add the following after your add_subdirectories() call.
Second add the following after your +add_subdirectories()+ call.
[source,cmake]
----
@@ -236,7 +249,7 @@ $ cmake ..
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Found CPPCHECK: /usr/bin/cppcheck
-- Found CPPCHECK: /usr/bin/cppcheck
adding cppcheck analysys target for subproject1
adding cppcheck analysys target for subproject2
analysis analysis targets are subproject1_analysis;subproject2_analysis
@@ -244,7 +257,7 @@ analysis analysis targets are subproject1_analysis;subproject2_analysis
-- Generating done
-- Build files have been written to: /home/matrim/workspace/cmake-examples/04-static-analysis/cppcheck/build
$ make analysis
$ make analysis
Scanning dependencies of target subproject1_analysis
Running cppcheck: subproject1
Checking main1.cpp...
@@ -277,8 +290,8 @@ main2.cpp includes an out-of-bounds error which shows the error.
------------------------------------------------------------------------------------
By default cppcheck only prints warnings and exits with a successful
exit code. If the $\{CPPCHECK_ARG} variable is set with
"--error-exitcode=1", the make analysis will finish early as follows.
exit code. If the +${CPPCHECK_ARG}+ variable is set with
`--error-exitcode=1`, the make analysis will finish early as follows.
[source,bash]
----
@@ -312,8 +325,8 @@ sub folders, such as below:
│   │   │   ├── main.cpp
------------------------------
You must add the following to the src/CMakeLists.txt file to correctly
generate the "make analysis" target
You must add the following to the `src/CMakeLists.txt` file to correctly
generate the `make analysis` target
[source,cmake]
----

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:toc:
:toc-placement!:
toc::[]
[[cmake-examples]]
cmake-examples
--------------
@@ -31,4 +36,3 @@ Some specific examples may require other tools including:
* boost `$ sudo apt-get libboost-all-dev`
* protobuf `$ sudo apt-get install libprotobuf-dev`
* cppcheck `$ sudo apt-get install cppcheck`