toolchain-funcs.exlib

Overview

toolchain-funcs.exlib is an exlib used to get common information about the toolchain being used to compile the package. This includes things such as the C compiler being used (gcc/clang), GCC version, and so on.

Functions

cc-has-defined(), cxx-has-defined()

Used to check if the C/CXX compiler at $CC/$CXX has a certain value defined.

It runs the compiler in question in a mode that ensures that it only dumps the internal definitions that are passed to all things the compiler compiles, and it contains some definitions such as the OS type, architecture type, the compiler implementation, and other details which may be desired by source code being compiled.

Usage

cc-has-defined __clang__ && echo compiling with clang.

cxx-has-defined __clang__ && echo compiling with clang++.

cc-is-clang(), cc-is-gcc(), cxx-is-clang(), cxx-is-gcc()

Used to check what implementation we support as system compiler is being used.

These are just simple checks that take advantage of the aforementioned cc-has-defined/cxx-has-defined functions to check for definitions which are set by clang and gcc.

Usage

! cc-is-gcc && die "This package should only be compiled with gcc."

! cxx-is-gcc && die "This package should only be compiled with g++."

gcc-fullversion(), gxx-fullversion()

Returns the full version of the C/CXX compiler being used.

Example Output

5.2.0

Usage

if [[ $(gcc-fullversion) == 5.2.0 ]];then
    echo "Wow, you've got a shiny new compiler there"
fi

gcc-version(), gxx-version()

Basically the same as gcc-fullversion, but only outputs the major and minor versions.

Example Output

5.2

gcc-major-version(), gxx-major-version()

Basically the same as gcc-version, but only returns the major.

gcc-minor-version(), gxx-major-version()

Basically the same as gcc-version, but only returns the minor.

gcc-major-version(), gxx-major-version()

Returns only the micro (the 0 in 5.2.0) from gcc-fullversion.

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Copyright 2015 Kylie McClain