Commit Graph

10 Commits

Author SHA1 Message Date
Brad King 943fe6e3b4 Revert "try_compile: Honor CMAKE_<LANG>_FLAGS_<CONFIG> changes"
Revert commit v3.6.0-rc1~160^2 (try_compile: Honor
CMAKE_<LANG>_FLAGS_<CONFIG> changes, 2016-04-11).  The behavior it
introduced can break projects that depend on the lack of such behavior.
We will have to introduce a policy or other mechanism to enable the
behavior in a compatible way.  Simply revert it for now.

See issue #16174.
2016-06-28 15:03:45 -04:00
Brad King d256ba078a try_compile: Optionally forward custom platform variables to test project
Add a `CMAKE_TRY_COMPILE_PLATFORM_VARIABLES` variable to specify a list
of custom variables to be forwarded to a `try_compile` test project.
This will be useful for platform information modules or toolchain files
to forward some platform-specific set of variables from the host project
(perhaps set in its cache) to the test project so that it can build the
same way.
2016-05-25 09:36:19 -04:00
Brad King bd581a3733 try_compile: Honor CMAKE_<LANG>_FLAGS_<CONFIG> changes (#16054)
In the `try_compile` source file signature we propagate the caller's
value of `CMAKE_<LANG>_FLAGS` into the test project.  Extend this to
propagate `CMAKE_<LANG>_FLAGS_<CONFIG>` too instead of always using the
default value in the test project.  This will be useful, for example, to
allow the MSVC runtime library to be changed (e.g. `-MDd` => `-MTd`).
2016-04-11 11:25:08 -04:00
Brad King 7f1bd9fe69 try_compile: Add option to control type of target
Create a `CMAKE_TRY_COMPILE_TARGET_TYPE` option to specify use
of `add_library(... STATIC ...)` for the generated test project.
This will be useful for cross-compiling toolchains that cannot
link a binary without custom flags or scripts.
2016-02-19 14:07:38 -05:00
Brad King daf95a3827 try_compile: Test that CMake re-runs on input change
With the Makefile and Ninja generators we expect that touching the input
source file for a try_compile will cause CMake to re-run on the next
build.  Extend the RunCMake.try_compile test with a case covering this.
Also check that CMake does not re-run if nothing has changed.
2015-01-27 11:18:36 -05:00
Brad King 88eb5824da try_compile: Pass linker flags into test project (#14066)
Copy CMAKE_EXE_LINKER_FLAGS into the test project generated by
try_compile, just like we already copy CMAKE_<LANG>_FLAGS.

Add CMake Policy CMP0056 to activate this behavior in a compatible way,
but do not warn by default when the policy is not set since it will
affect all try_compile calls.

Extend the RunCMake.try_compile test with a case covering this behavior
for each policy setting.
2014-12-03 15:30:22 -05:00
Brad King c28715b16c try_compile: Add COPY_FILE_ERROR option to capture failure
When the COPY_FILE operation fails optionally capture the error message
with a COPY_FILE_ERROR option instead of reporting the error
immediately.  This gives callers a chance to do something else or report
the error.

Teach the RunCMake.try_compile test to cover bad argument combinations
involving COPY_FILE_ERROR.  Teach the TryCompile test to cover the case
of a COPY_FILE error message captured by COPY_FILE_ERROR.
2013-07-15 09:16:36 -04:00
Brad King 482f1122ad try_compile: Add signature to allow multiple SOURCES
Extend the signature

 try_compile(RESULT_VAR <bindir> <srcfile> ...)

to allow multiple sources as

 try_compile(RESULT_VAR <bindir> SOURCES <srcfile>... ...)

Process the sources to generate a CMakeLists.txt that enables all needed
languages.

Teach the TryCompile test to try cases with two sources of the same
language and of mixed languages.  Teach RunCMake.try_compile to cover
error cases for the signature.
2013-06-06 14:35:20 -04:00
Brad King d06db7ebe8 try_compile: Refactor argument processing
Process all arguments in a single loop using a simple state machine.
While at it, fix some error message typos.  Also allow LINK_LIBRARIES
with no actual libraries to disable use of the -DLINK_LIBRARIES=...
from the CMAKE_FLAGS.  This was already possible in the old logic if
LINK_LIBRARIES was immediately followed by another keyword argument
instead of the end of the argument list, so allow it in general.
Update the RunCMake.try_compile test cases accordingly.
2013-05-31 10:01:50 -04:00
Brad King b680824a5f try_compile: Add test for bad call error cases
Add a RunCMake.try_compile test to cover cases of bad invocation of the
try_compile command.
2013-05-31 10:00:42 -04:00