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When Make starts, it uses the makefile specified on the command-line or if not specified, then uses the one found by via specific search rules. Generally, Make defaults to using the file in the working directory named Makefile. GNU Make searches for the first file matching: GNUmakefile, makefile, or Makefile.
Similarly, a variable CPPFLAGS exists with switches to be passed to the C or C++ preprocessor. Similarly, FFLAGS enables the addition of switches for a Fortran compiler. These variables are most commonly used to specify optimization or debugging switches to a compiler, as for example -g , -O2 or ( GCC -specific) -march=athlon .
Buildroot is a set of Makefiles and patches that simplifies and automates the process of building a complete and bootable Linux environment for an embedded system, while using cross-compilation to allow building for multiple target platforms on a single Linux-based development system.
MAKE is an utility helping to serialized shell commands while stating the pre-required elements for each of these commands. As such, running a well conceived makefile allow to reproduce a complexe tree-like network of commands, in the right order, despite several starting points and bricks required for a final output or group of outputs.
Both tools were working examples of a build tool that supported both Unix and Windows, but they suffered from a serious flaw: they required Windows developers to use the command line even though many prefer to use an integrated development environment (IDE) such as Visual Studio.
makedepend was developed as part of MIT's Project Athena.It was used extensively in building X11 and ancillary packages, but has since become superseded by the dependency generation facilities of various compilers, and is now used primarily as a worst-case fallback, e.g. by depcomp and GNU Automake.
qmake is a software build automation tool that generates makefiles for building a codebase. As it generates configuration files for other build tools, it is classified as a meta-build tool. The makefiles that qmake produces are tailored to the particular platform where it is run from based on qmake project files.
Intrinsic functions are often used to explicitly implement vectorization and parallelization in languages which do not address such constructs. Some application programming interfaces (API), for example, AltiVec and OpenMP, use intrinsic functions to declare, respectively, vectorizable and multiprocessing-aware operations during compiling.