29ab3bd5f2
Original-commit: flang-compiler/f18@f57451d8d4 Reviewed-on: https://github.com/flang-compiler/f18/pull/84 Tree-same-pre-rewrite: false
1.6 KiB
f18
Selection of the C/C++ compiler
F18 requires a C++17 compiler. The code has been tested with g++ 7.2.0, g++ 7.3.0, g++ 8.1.0, and clang 6.0 (using g++ 7.3.0 or 8.1.0 headers, each with small patches).
For a proper installation, we assume that the PATH and LD_LIBRARY_PATH environment variables are properly set to use gcc, g++ and the associated libraries.
cmake will require that the environment variables CC and CXX are properly set (else it would search for the 'cc' and 'c++' commands which are likely /usr/bin/cc and /usr/bin/c++). That can be done now or while calling cmake.
export CC=gcc
export CXX=g++
Installation of LLVM & CLANG 6.0
F18 depends on the LLVM & CLANG libraries even when clang is not used as C++ compiler.
If those libraries are not provided by your system, then you may want to follow the build instructions at https://clang.llvm.org/get_started.html .
Installation of F18
######## Choose the installation directory
F18_PREFIX=...
######## Get Flang sources in $ROOT/f18
cd $ROOT
git clone https://github.com/ThePortlandGroup/f18.git
######## And build f18 in a dedicated directory
######## Reminder: If LLVM & Clang were not installed in a standard
######## location, then you may also have to specify it via the
######## CMAKE_MODULE_PATH or CMAKE_PREFIX_PATH variables.
mkdir $ROOT/f18-build
cd $ROOT/f18-build
CC=gcc CXX=g++ cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=$F18_PREFIX $ROOT/f18
make -j 8
make install