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Tools like autoconf's ./configure script will usually pick them up from the environment and write them into the generated Makefiles. Some package install scripts, like SDL, allow CFLAGS settings to override their normal settings (instead of append to them), so setting CFLAGS can cause harm in this case.
A makefile can define and use macros. Macros are usually referred to as variables when they hold simple string definitions, like CC = clang. Macros in makefiles may be overridden in the command-line arguments passed to the Make utility. Environment variables are also available as macros.
Each Makefile.am contains, among other things, useful variable definitions for the compiled software, such as compiler and linker flags, dependencies and their versions, etc. The generated " Makefile.in "s are portable and compliant with the Makefile conventions in the GNU Coding Standards , and may be used by configure scripts to generate a ...
makedepend is invoked with a list of sourcefiles: . makedepend [options] foo.c bar.c ... However, it is more often invoked as a target from a makefile, typically under the depend target, such that make depend will invoke makedepend on all source files in the project.
Displays and modifies environment variables: expr: Evaluates expressions factor: Factors numbers: false: Does nothing, but exits unsuccessfully groups: Prints the groups of which the user is a member hostid: Prints the numeric identifier for the current host id: Prints real or effective UID and GID: link: Creates a link to a file logname: Print ...
The GNU Autotools, also known as the GNU Build System, is a suite of build automation tools designed to support building source code and packaging the resulting binaries. It supports building a codebase for multiple target systems without customizing or modifying the code.
The Department of Government Efficiency’s embed into the federal government has raised a host of concerns, transforming a debate over how to cut government waste into a confrontation over ...
In makefiles, a common target clobber means complete cleanup of all unnecessary files and directories produced by previous invocations of the make command. [4] It is a more severe target than clean and is commonly used to uninstall software. Some make-related commands invoke "make clobber" during their execution.