llvm/flang
Tim Keith 9727b06813 [flang] Support for USE statements.
When a USE statement is encountered, find the scope corresponding to the
module. This is now stored in the ModuleDetails of the module symbol.
useModuleScope_ tracks this while processing the USE. Currently only
modules defined in the same file work because we don't have module files.

At the end of a USE that isn't a use-only, add all public names that
were not renamed.

AddUse() handles recording of a USE by creating a local symbol with
UseDetails that tracks the use-symbol in the module and the location of
the USE (for error messages). If an ambiguous USE is detected, the
UseDetails are replaced by UseErrorDetails. This tracks the locations of
all the uses so that they can be referenced in a diagnostic.

Detect attempts to re-declare use-associated symbols as well as changing
their attributes (except for ASYNCHRONOUS and VOLATILE).

Add missing checks for access-stmt in scoping units other than modules.

Add tests for the new errors.

Reorganize the MessageHandler::Say() overloadings to prevent them from
becoming too numerous.

Original-commit: flang-compiler/f18@cc0523134c
Reviewed-on: https://github.com/flang-compiler/f18/pull/79
2018-05-03 15:57:56 -07:00
..
documentation [flang] Add copyright notices. 2018-05-01 12:50:34 -07:00
include/flang [flang] Add copyright notices. 2018-05-01 12:50:34 -07:00
lib [flang] Support for USE statements. 2018-05-03 15:57:56 -07:00
test/semantics [flang] Support for USE statements. 2018-05-03 15:57:56 -07:00
tools [flang] Manual backport of sch_llvm branch 2018-05-03 14:54:53 +02:00
.clang-format [flang] Improve include file sorting. 2018-04-12 12:23:20 -07:00
.gitignore [flang] Add MinSizeRel to .gitignore. 2018-03-29 11:19:37 -07:00
CMakeLists.txt [flang] Manual backport of sch_llvm branch 2018-05-03 14:54:53 +02:00
README.md [flang] misc changes in response to pul-request comments 2018-05-04 11:18:34 +02:00

f18

Selection of the C/C++ compiler

F18 requires a C++17 compiler. As of today, the code was only tested with g++ 7.2.0, g++ 7.3.0 and clang 6.0.

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 environement variables CC and CXX are properly set (else it will search for use the 'cc' and 'c++' program 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 of 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 it in a dedicated directory
######## Reminder: If LLVM & Clang where 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 4
make install