The __STDC_VERSION__ macro may be defined or not depending on the
implementation dialect of C. Test that it is defined before testing
its value.
The CXX tests do not need such a change because they define __cplusplus
in all dialects.
Extend the write_compiler_detection_header interface to allow
specifying a location for supplementary files, and getting the
list of resulting files as a variable.
This commit fixes a bug where it was impossible to specify
/INCREMENTAL to Fortran projects built with Visual Studio.
The problem was due to the fact that .vfproj files expect
the value of this flag to be "linkIncremental{No,Yes},
whereas .vcproj files expect this value to be 0, 1, or 2.
The implementation of this fix adds a new data structure for
Visual Studio linker flags specific to Fortran. This can
easily be extended in the future if more such discrepencies
between C/C++ and Fortran linking are discovered.
The existing versions have been used since commit
v3.1.0-rc1~635^2~8 (cmTarget: Add CXX_STANDARD and CXX_EXTENSION
target properties., 2013-10-13), but further discussions since then
increased the initial minimum compiler versions this feature is
available for.
Clang 3.4 uses C99 by default, and Clang 3.6 uses C11 by default:
http://thread.gmane.org/gmane.comp.compilers.clang.devel/39379
GNU 4.9 uses C90 by default, and GNU 5.0 uses C11 by default:
https://gcc.gnu.org/gcc-5/changes.html
Test that the default compiler settings result in the expected dialect
macros being defined for both C and CXX. Remove the unused main.c
file from the CompileFeatures unit test.
fa1a066a Merge branch 'backport-fix-CMP0054-MSVC' into fix-CMP0054-MSVC
4d52cd36 Avoid if() quoted auto-dereference when checking for "MSVC"
543c4304 Avoid if() quoted auto-dereference when checking for "MSVC"
OS X provides a stub 'java' to inform callers that Java is not present.
When checking the 'java -version' output, look for such a message and if
found pretend 'java' was not found.
Suggested-by: Sean McBride <sean@rogue-research.com>
When CMake is built with CMake 3.1 or later, appropriate -std=
options will be added for GNU and Clang compilers while building
C and CXX code.
This allows taking advantage of 'hidden' language features such
as move-constructors, and allows the standard library to enable
the use of more-advanced features too, where available.
This does not change CMake host compiler requirements.
Re-run if the input file changes or if the output file is removed.
This only works with the Makefile generators currently. The limitation
of the Ninja generator is tracked as issue #15256. The IDE
generators will need larger refactoring as they currently rely on
being able to determine the depends and output files at the start of
generate-time, which is too early for the file(GENERATE) case.
Brad King
Stephen Kelly
Kitware Robot
Zack Galbreath
Nils Gladitz
Fraser Hutchison