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gcc: The GNU Compiler Collection or other suitable C and C++ compilers

Description

This package represents the required C and C++ compilers.

  • GCC (GNU Compiler Collection) versions 8.x to 12.x are supported.
  • Clang (LLVM) is also supported.

The required Fortran compiler is represented by the package gfortran.

You can pass the names of compilers to use to ./configure using the environment variables CC, CXX, and FC, for C, C++, and Fortran compilers, respectively.

For example, if your C compiler is clang, your C++ compiler is clang++, and your Fortran compiler is flang, then you would need to run:

$ ./configure CC=clang CXX=clang++ FC=flang

Vendor and versions of the C and C++ compilers should match.

Users of older Linux distributions (in particular, ubuntu-xenial or older, debian-stretch or older, linuxmint-18 or older) should upgrade their systems before attempting to install Sage from source. Users of ubuntu-bionic, linuxmint-19.x, and opensuse-15.x can install a versioned gcc system package and then use:

$ ./configure CC=gcc-8 CXX=g++-8 FC=gfortran-8

or similar. Users on ubuntu can also install a modern compiler toolchain using the ubuntu-toolchain-r ppa. On ubuntu-trusty, also the package binutils-2.26 is required; after installing it, make it available using export PATH="/usr/lib/binutils-2.26/bin:$PATH". Instead of upgrading their distribution, users of centos-7 can install a modern compiler toolchain using Redhat's devtoolset.

This package uses the non-standard default configure --with-system-gcc=force, giving an error at configure time when no suitable system compilers are configured.

You can override this using ./configure --without-system-gcc. In this case, Sage builds and installs the GNU Compiler Collection, including the C, C++ and Fortran compiler. This is not recommended. You will need suitable C and C++ compilers from which GCC can bootstrap itself. There are some known problems with old assemblers, in particular when building the ecm and fflas_ffpack packages. You should ensure that your assembler understands all instructions for your processor. On Linux, this means you need a recent version of binutils (not provided by an SPKG); on macOS you need a recent version of Xcode.

(Installing the gfortran SPKG becomes a no-op in this case.)

Building Sage from source on Apple Silicon (M1/M2) requires the use of Apple's Command Line Tools, and those tools include a suitable compiler. Sage's gcc SPKG is not suitable for M1/M2; building it will likely fail.

License

GPL version 2 or version 3

Upstream Contact

https://gcc.gnu.org/