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Fix and document the CMake CGAL_HAS_NO_THREADS option

This commit is contained in:
Laurent Rineau 2021-06-16 17:12:59 +02:00
parent 6652df3298
commit 530616534a
2 changed files with 8 additions and 3 deletions
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7
Documentation/doc/Documentation/Preliminaries.txt
View File

@ -33,8 +33,11 @@ are:
If the macro `CGAL_HAS_THREADS` is not defined, then \cgal assumes it can use
any thread-unsafe code (such as static variables). By default, this macro is not
defined, unless `BOOST_HAS_THREADS` or `_OPENMP` is defined. It is possible
to force its definition on the command line, and it is possible to prevent its default
definition by setting `CGAL_HAS_NO_THREADS` from the command line.
to force its definition in the compiler options, and it is possible to prevent its
default definition by defining the macro `CGAL_HAS_NO_THREADS`.
If you are using CMake, then you can set the CMake option `CGAL_HAS_NO_THREADS` to
`TRUE`. In addition to defining the preprocessor macro CGAL_HAS_NO_THREADS`, it will
also avoid CMake to link with the native threads support library on your system.
\section Preliminaries_cc0x C++14 Support

4
Installation/cmake/modules/CGAL_SetupCGALDependencies.cmake
View File

@ -144,7 +144,9 @@ function(CGAL_setup_CGAL_dependencies target)
if ( RUNNING_CGAL_AUTO_TEST )
target_compile_options(${target} INTERFACE "-Wall")
endif()
if(NOT CGAL_HAS_NO_THREADS)
if(CGAL_HAS_NO_THREADS)
target_compile_definitions(${target} INTERFACE CGAL_HAS_NO_THREADS)
else()
if(NOT TARGET Threads::Threads)
find_package(Threads REQUIRED)
endif()