Contents
What is sysconfdir?
‘ sysconfdir ‘ The directory for installing read-only data files that pertain to a single machine–that is to say, files for configuring a host. Mailer and network configuration files, /etc/passwd , and so forth belong here.
How do you use variables in Makefile?
A variable is a name defined in a makefile to represent a string of text, called the variable’s value. These values are substituted by explicit request into targets, prerequisites, recipes, and other parts of the makefile. (In some other versions of make , variables are called macros.)
What is Localstatedir?
localstatedir. The directory for installing data files which the programs modify while they run, and that pertain to one specific machine.
What is ?= IN MAKE?
?= indicates to set the KDIR variable only if it’s not set/doesn’t have a value. For example: KDIR ?= “foo” KDIR ?= “bar” test: echo $(KDIR)
What is Gnuinstalldirs?
Define GNU standard installation directories. Provides install directory variables as defined by the GNU Coding Standards.
What is Cmake_install_prefix?
Install directory used by install() . If make install is invoked or INSTALL is built, this directory is prepended onto all install directories. This variable defaults to /usr/local on UNIX and c:/Program Files/${PROJECT_NAME} on Windows.
What is the difference between and in Makefile?
In the former Makefile, a is not evaluated until it’s used elsewhere in the Makefile, while in the latter a is evaluated immediately even though it’s not used.
How do I set #define in Makefile?
Just add -Dxxx=yy on the command line ( xxx the name of the macro and yy the replacement, or just -Dxxx if there is no value). It’s not a Makefile command, it’s part of the compiler command line options. It means, xxx is the name and yy is the value. For example, #define xxx (yy) is -Dxxx=yy .
What is Cmake_install CMake?
cmake -DBUILD_TYPE=Debug -P cmake_install. cmake. DESTDIR. This is an environment variable rather than a CMake variable. It allows you to change the installation prefix on UNIX systems.
What is Cmake_current_list_dir?
CMAKE_CURRENT_LIST_DIR: Full directory of the listfile currently being processed. As CMake processes the listfiles in your project this variable will always be set to the directory where the listfile which is currently being processed (CMAKE_CURRENT_LIST_FILE) is located. The value has dynamic scope.
What kind of files are in the sysconfdir Directory?
‘sysconfdir’ The directory for installing read-only data files that pertain to a single machine–that is to say, files for configuring a host. Mailer and network configuration files, /etc/passwd, and so forth belong here. All the files in this directory should be ordinary ASCII text files.
How to add # define in makefile?
In your makefile you have the compiler command line, something like (simplest example): To get that #define for every myfile.cpp just use -D like so: I would add the compiler flag to set a macro ( -D for GCC) to the standard variable CXXFLAGS so it will be applied to any implicit rule compiler invocations:
Which is the root of a directory in makefile?
Here are the variables Makefiles should use to specify directories to put these various kinds of files in: The root of the directory tree for read-only architecture-independent data files. This should normally be /usr/local/share, but write it as $ (prefix)/share.
Which is the default variable for datadir in Autoconf?
(If you are using Autoconf, write it as ‘ @datarootdir@ ’.) ‘ datadir ’’s default value is based on this variable; so are ‘ infodir ’, ‘ mandir ’, and others. The directory for installing idiosyncratic read-only architecture-independent data files for this program.