Programming/Tools/CMake - Revision history

Admin at 13:49, 29 November 2023

2023-11-29T13:49:37Z

← Older revision		Revision as of 13:49, 29 November 2023
Line 62:		Line 62:

	<pre>		<pre>
	cmake_minimum_required(VERSION 3.0)		cmake_minimum_required(VERSION 3.5)
	project(cmake_test_project)		project(cmake_test_project)
	</pre>		</pre>
Line 236:		Line 236:
	First, let us modify <tt>.../my_project/CMakeLists.txt</tt>:		First, let us modify <tt>.../my_project/CMakeLists.txt</tt>:
	<pre>		<pre>
	cmake_minimum_required(VERSION 3.0)		cmake_minimum_required(VERSION 3.5)
	project(cmake_test_project)		project(cmake_test_project)

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	We need to tell the compiler about this file (actually, the directory that contains it) by modifying <tt>.../my_project/CMakeLists.txt</tt> as follows:		We need to tell the compiler about this file (actually, the directory that contains it) by modifying <tt>.../my_project/CMakeLists.txt</tt> as follows:
	<pre>		<pre>
	cmake_minimum_required(VERSION 3.0)		cmake_minimum_required(VERSION 3.5)
	project(cmake_test_project)		project(cmake_test_project)

2023-11-22T17:51:31Z

← Older revision		Revision as of 17:51, 22 November 2023
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	<pre>		<pre>
			cmake_minimum_required(VERSION 3.0)
	project(cmake_test_project)		project(cmake_test_project)
	~~cmake_minimum_required(VERSION 3.0)~~
	</pre>		</pre>

Line 236:		Line 236:
	First, let us modify <tt>.../my_project/CMakeLists.txt</tt>:		First, let us modify <tt>.../my_project/CMakeLists.txt</tt>:
	<pre>		<pre>
			cmake_minimum_required(VERSION 3.0)
	project(cmake_test_project)		project(cmake_test_project)
	~~cmake_minimum_required(VERSION 3.0)~~

	message(STATUS "* Building my_project from ${PROJECT_SOURCE_DIR} *")		message(STATUS "* Building my_project from ${PROJECT_SOURCE_DIR} *")
Line 428:		Line 428:
	We need to tell the compiler about this file (actually, the directory that contains it) by modifying <tt>.../my_project/CMakeLists.txt</tt> as follows:		We need to tell the compiler about this file (actually, the directory that contains it) by modifying <tt>.../my_project/CMakeLists.txt</tt> as follows:
	<pre>		<pre>
			cmake_minimum_required(VERSION 3.0)
	project(cmake_test_project)		project(cmake_test_project)
	~~cmake_minimum_required(VERSION 3.0)~~

	message(STATUS "* Building my_project from ${PROJECT_SOURCE_DIR} *")		message(STATUS "* Building my_project from ${PROJECT_SOURCE_DIR} *")

2020-12-28T12:49:09Z

@@ Line 471: / Line 471: @@
 = Adding a static library =
 We have mentioned some reasons why header-only libraries may not be a good idea in some situations.
 Let us modify <tt>.../my_project/build/include/sphere.h</tt> so it contains declarations rather than definitions:
@@ Line 598: / Line 604: @@
 Volume of sphere = 179.594376
 </pre>

2020-12-28T12:32:32Z

← Older revision		Revision as of 12:32, 28 December 2020
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	ubuntu@ip-172-31-24-17:~/my_project/build$		ubuntu@ip-172-31-24-17:~/my_project/build$
	</pre>		</pre>

			Notice that the resulting static library is called <tt>liblib_sphere.a</tt>. We shouldn't have named the library <tt>lib_sphere</tt> in <tt>CMakeLists.txt</tt>: the prefix <tt>lib</tt> is automatically prepended, the suffix <tt>.a</tt> is automatically appended.

	Let's test the executable:		Let's test the executable:

2020-12-28T12:26:38Z

← Older revision		Revision as of 12:26, 28 December 2020
Line 470:		Line 470:
	For C++ templates, including the definitions in the header is the only way to compile, since the compiler needs to know the full definition of the templates in order to instantiate.		For C++ templates, including the definitions in the header is the only way to compile, since the compiler needs to know the full definition of the templates in order to instantiate.

	= Adding a library =		= Adding a static library =

	We have mentioned some reasons why header-only libraries may not be a good idea in some situations.		We have mentioned some reasons why header-only libraries may not be a good idea in some situations.

2020-12-28T12:26:09Z

← Older revision		Revision as of 12:26, 28 December 2020
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	-- Generating done		-- Generating done
	-- Build files have been written to: /home/ubuntu/my_project/build		-- Build files have been written to: /home/ubuntu/my_project/build
			$ make clean
	$ make		$ make
	Scanning dependencies of target bin_main		Scanning dependencies of target bin_main

2020-12-28T12:15:32Z

← Older revision		Revision as of 12:15, 28 December 2020
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	</pre>		</pre>

	As the error suggests, the directory <tt>.../my_project/src/</tt>, which we have added to <tt>.../my_project/CMakeLists.txt</tt> must contain (another) <tt>CMakeLists.txt</tt> file. CMake ~~has~~ a hierarchical configuration system. For now, let us simply		As the error suggests, the directory <tt>.../my_project/src/</tt>, which we have added to <tt>.../my_project/CMakeLists.txt</tt> must contain (another) <tt>CMakeLists.txt</tt> file. CMake uses a hierarchical configuration system. For now, let us simply
	<pre>		<pre>
	$ touch ../src/CMakeLists.txt		$ touch ../src/CMakeLists.txt

2020-12-28T12:14:18Z

← Older revision		Revision as of 12:14, 28 December 2020
Line 251:		Line 251:
	<pre>		<pre>
	-- * Building my_project from /home/ubuntu/my_project *		-- * Building my_project from /home/ubuntu/my_project *
	CMake Error at CMakeLists.txt:6 (add_subdirectory):		CMake Error at CMakeLists.txt:5 (add_subdirectory):
	The source directory		The source directory

2020-12-28T12:11:35Z

← Older revision		Revision as of 12:11, 28 December 2020
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	</pre>		</pre>

	However, this <tt>Makefile</tt> doesn't do anything useful. That is because we haven't written any code in our project. Let's add it.		This <tt>Makefile</tt> is rather complex, but we needn't worry: CMake has generated it for us. However, this <tt>Makefile</tt> (at this stage) doesn't do anything useful. That is because we haven't written any code in our project. Let's add it.

	First, let us modify <tt>.../my_project/CMakeLists.txt</tt>:		First, let us modify <tt>.../my_project/CMakeLists.txt</tt>:

2020-12-28T12:08:29Z

← Older revision		Revision as of 12:08, 28 December 2020
Line 75:		Line 75:
	We should see something like this:		We should see something like this:
	<pre>		<pre>
			-- The C compiler identification is GNU 9.3.0
	-- The CXX compiler identification is GNU 9.3.0		-- The CXX compiler identification is GNU 9.3.0
			-- 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
			-- Detecting C compile features
			-- Detecting C compile features - done
	-- Check for working CXX compiler: /usr/bin/c++		-- Check for working CXX compiler: /usr/bin/c++
	-- Check for working CXX compiler: /usr/bin/c++ -- works		-- Check for working CXX compiler: /usr/bin/c++ -- works