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CFLAGS enables the addition of switches for the C compiler, while CXXFLAGS is meant to be used when invoking a C++ compiler. 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.
This may be preferred to makedepend because it reduces the likelihood of the dependencies generated being at odds with the compiler's own behavior. Since compilers accept different flags for dependency generation, and may behave differently in outputting dependency information, it is desirable to use a wrapper script that can invoke the ...
The Intel compiler and several different Intel function libraries have suboptimal performance on AMD and VIA processors. The reason is that the compiler or library can make multiple versions of a piece of code, each optimized for a certain processor and instruction set, for example SSE2, SSE3, etc. The system includes a function that detects ...
Make's dependency ordering and out-of-date checking makes the build process more robust and more efficient. The makefile allowed for better organization of build logic and often fewer build files. Make is widely used in part due to its early inclusion in Unix, starting with PWB/UNIX 1.0, which featured a variety of software development tools. [3]
CMake is a free, cross-platform, software development tool for building applications via compiler-independent instructions. It also can automate testing , packaging and installation . It runs on a variety of platforms and supports many programming languages .
gcc and clang offer the -mno-red-zone flag to disable red-zone optimizations. If the callee is a variadic function , then the number of floating point arguments passed to the function in vector registers must be provided by the caller in the AL register.
The procedure call uses an indirect pointer pair [11] with a flag to cause a trap on the first call so that the dynamic linkage mechanism can add the new procedure and its linkage segment to the Known Segment Table (KST), construct a new linkage segment, put their segment numbers in the caller's linkage section and reset the flag in the ...
The GNU Fortran compiler automatically calls "traditional mode" (see below) cpp before compiling Fortran code if certain file extensions are used. [17] Intel offers a Fortran preprocessor, fpp, for use with the ifort compiler, which has similar capabilities. [18] CPP also works acceptably with most assembly languages and Algol-like languages.