Commit Graph

35 Commits

Author SHA1 Message Date
Sebastian Leske 908c74399a Help: Document that the CHECK_* macros create cache variables
Otherwise callers may expect to be able to re-use result variables.
2014-09-11 08:55:26 -04:00
Brad King 4ffec8f666 Check*: Add compatibility hack for old VXL code
The cleanup in commit 4f2fcce4 (Check*: Allow result variables to
contain regex special characters, 2014-07-31) broke old VXL code that
abuses the old "if(MATCHES)" implementation by using

  SET( ${VARIABLE} ${VARIABLE} )

to reset a check result variable.  Add a compatibility hack to the
CheckFunctionExists, CheckIncludeFileCXX, and CheckSymbolExists modules
to re-run their checks when the result variable is set to its own name.
Use STREQUAL instead of MATCHES so that special characters still work.
2014-08-18 10:59:08 -04:00
Brad King 4f2fcce4b9 Check*: Allow result variables to contain regex special characters (#14923)
Prior to the existence of the if(DEFINED) condition, many of our Check
modules implemented the condition with a hack that takes advantage of
the auto-dereference behavior of the if() command to detect if a
variable is defined.  The hack has the form:

 if("${VAR} MATCHES "^${VAR}$")

where "${VAR}" is a macro argument reference.  However, this does not
work when the variable named in the macro argument contains characters
that have special meaning in regular expressions, such as '+'.  Run the
command

 git grep -E 'if\("\$\{.*\}" MATCHES "\^\$\{.*\}\$"\)' -- Modules/Check*

to identify lines with this problem.  Use if(NOT DEFINED) instead.
2014-07-31 09:48:41 -04:00
Clinton Stimpson 4c0cc9ab91 Check*.cmake : Add CMAKE_REQUIRED_QUIET flag.
Setting this flag can silence messages from the Check*.cmake modules.
This can be used by Find*.cmake modules when they are in silent mode.
2014-03-29 20:14:23 -06:00
Daniele E. Domenichelli 15610bb5b1 Drop use of configure_file IMMEDIATE option
Since commit 7d47c693 (Drop compatibility with CMake < 2.4, 2013-10-08)
we no longer need to use the configure_file IMMEDIATE option to support
compatibility modes less than 2.0.
2013-11-13 10:12:17 -05:00
Kitware Robot f051814ed0 Convert builtin help to reStructuredText source files
Run the convert-help.bash script to convert documentation:

 ./convert-help.bash "/path/to/CMake-build/bin"

Then remove it.
2013-10-15 14:12:03 -04:00
Stephen Kelly 236133e79e Handle targets in the LINK_LIBRARIES of try_compile.
Imported targets are re-exported so that they can be used by the
try_compile generated code with target_link_libraries.

This makes the use of the cmake_expand_imported_targets macro
obsolete. The macro is not able to expand the generator expressions
which may appear in the IMPORTED_LINK_INTERFACE_LIBRARIES content.
Instead it just sees them as 'not a target'.
2013-02-22 08:35:39 -05:00
Stephen Kelly 4ad02332aa Remove period at the end of the check message.
Other messages don't have one.
2012-09-29 18:44:41 +02:00
Kitware Robot 9db3116226 Remove CMake-language block-end command arguments
Ancient versions of CMake required else(), endif(), and similar block
termination commands to have arguments matching the command starting the
block.  This is no longer the preferred style.

Run the following shell code:

for c in else endif endforeach endfunction endmacro endwhile; do
    echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/'
done >convert.sed &&
git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' |
egrep -z -v '^(Utilities/cm|Source/kwsys/)' |
egrep -z -v 'Tests/CMakeTests/While-Endwhile-' |
xargs -0 sed -i -f convert.sed &&
rm convert.sed
2012-08-13 14:19:16 -04:00
Kitware Robot 77543bde41 Convert CMake-language commands to lower case
Ancient CMake versions required upper-case commands.  Later command
names became case-insensitive.  Now the preferred style is lower-case.

Run the following shell code:

cmake --help-command-list |
grep -v "cmake version" |
while read c; do
    echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g'
done >convert.sed &&
git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' |
egrep -z -v '^(Utilities/cm|Source/kwsys/)' |
xargs -0 sed -i -f convert.sed &&
rm convert.sed
2012-08-13 14:19:16 -04:00
Alex Neundorf 35c48e1270 Check*.cmake: Expand imported targets in CMAKE_REQUIRED_LIBRARIES
Add the function cmake_expand_imported_targets() to expand imported
targets in a list of libraries into their on-disk file names for a
particular configuration.  Adapt the implementation from KDE's
HANDLE_IMPORTED_TARGETS_IN_CMAKE_REQUIRED_LIBRARIES which has been in
use for over 2 years.  Call the function from all the Check*.cmake
macros to handle imported targets named in CMAKE_REQUIRED_LIBRARIES.

Alex
2012-02-21 15:38:15 -05:00
Rolf Eike Beer 813eca6416 CheckSymbolExists: force the compiler to keep the referenced symbol
Otherwise the compiler may optimize out the reference to the symbol as the
previous version was not really using this. This leads to symbols that are
only in a header but not in the given libraries to be reported as present.

This came up on the first try to fix bug 11333 as "gcc -O3" would optimize
out the reference to pthread_create() so the correct library the symbol is in
was not detected.

The new test code was suggested by Brad King.
2012-01-16 20:27:40 +01:00
David Cole 6b3993b0bf CheckSymbolExists: Use IMMEDIATE flag for configure_file (#11333)
The test "complex" sets the variable CMAKE_BACKWARDS_COMPATIBILITY
to 1.4. When that variable is set, configure_file does not default
to IMMEDIATE mode processing. And so, the output file likely does
not exist yet by the time the next line in the CMakeLists.txt file
is processed. When that next line is "try_compile" on that file,
this is a problem.

Fix the problem by explicitly using IMMEDIATE in the configure_file
call.

This problem was quite mysterious, as it only showed up on the
"complex" test, when the previous commit introduced a CheckSymbolExists
call into the FindThreads module. Which is not even explicitly included
in the "complex" test... FindThreads gets included indirectly only
as a side effect of setting CMAKE_BACKWARDS_COMPATIBILITY to 1.4 and
even then it's included indirectly by auto-inclusion of
CMakeBackwardCompatibilityC.cmake...

Wow. Just wow.
2011-08-22 15:50:03 -04:00
Alex Neundorf 6b71bf8876 Remove debug output from CheckSymbolExists
...which shouldn't have been committed.

Alex
2011-07-29 23:27:28 +02:00
Alex Neundorf 757a6a091c Add CheckCXXSymbolExists.cmake, so this can be used also for C++
This commit splits check_symbol_exists() so that the actual
implementation can be also used by check_cxx_symbol_exists()

Alex
2011-07-08 21:09:32 +02:00
Brad King 4995b267b7 Update CheckSymbolExists copyright year
Reflect that commit 840f9c05 (Document CheckSymbolExists more clearly,
2011-01-12) changed the file in 2011.
2011-01-17 14:10:55 -05:00
Brad King 840f9c055c Document CheckSymbolExists more clearly (#11685)
The check works for macros, functions, and variables, but not for types
or enumeration values.  Clearly describe the behavior of the check with
respect to each symbol type.
2011-01-12 08:58:19 -05:00
Todd Gamblin 2cde67a781 Modules: Fix spelling 'To distributed' -> 'To distribute' 2010-08-09 08:48:31 -04:00
Brad King 3a666595c9 Convert CMake non-find modules to BSD License
This adds copyright/license notification blocks CMake's non-find
modules.  Most of the modules had no notices at all.  Some had notices
referring to the BSD license already.  This commit normalizes existing
notices and adds missing notices.
2009-09-28 11:46:51 -04:00
Ken Martin 8e9a6beccc ENH: centralized locaiton of CMakeFiles setting 2006-06-14 12:28:32 -04:00
Andy Cedilnik 01a55559dd ENH: Make modules use configure instead of file write 2006-02-23 09:58:07 -05:00
Brad King f0a1da00c1 ENH: Made Check* modules more consistent and well documented. Added CMAKE_REQUIRED_DEFINITIONS option. 2006-02-09 19:23:18 -05:00
Brad King 0ddf06e952 ENH: Pay attention to CMAKE_REQUIRED_INCLUDES. 2006-02-09 14:28:01 -05:00
Ken Martin 4bdca3b404 ENH: put CmakeTmp into CMakeFiles 2006-01-12 13:49:32 -05:00
Ken Martin d2689c95a1 ENH: some style fixes for the book 2005-12-15 10:41:19 -05:00
Bill Hoffman b7fa820118 ENH: add documentation support for modules 2005-12-14 13:51:08 -05:00
Ken Martin 0a5b9db60b DOC: better documentaiton 2005-11-02 13:51:59 -05:00
Ken Martin c6b011e35e ENH: put cmake files intoa CMakeFiles subdir to clean up bin tree 2005-07-29 09:19:25 -04:00
Andy Cedilnik d6ebc123f7 ENH: Extra new line after output 2003-07-17 14:55:45 -04:00
Andy Cedilnik a17587c244 ENH: Replace WRITE_FILE with FILE(WRITE and FILE(APPEND. Replace MAKE_DIRECTORY with FILE(MAKE_DIRECTORY, replace STRING(ASCII things 2003-07-11 14:14:03 -04:00
Andy Cedilnik 4e66ef8fe1 New design of CheckSymbolExists pretty much replaces all other ones.
For example:

CHECK_HEADER_EXISTS("type.h" HAVE_TYPE_H)
is:
CHECK_SYMBOL_EXISTS(main "type.h" HAVE_TYPE_H)

CHECK_LIBRARY_EXISTS("nsl"    gethostname  HAVE_LIBNSL)
would be
SET(CMAKE_REQUIRED_LIBRARIES "nsl")
CHECK_SYMBOL_EXISTS(gethostname "netdb.h" HAVE_LIBNSL)

...
2003-03-28 13:42:34 -05:00
Andy Cedilnik 4a2d04f42a Prevent CMake from putting ; in the file 2003-03-16 20:33:51 -05:00
Andy Cedilnik e71b03cbf0 Fix update date and cleanup 2003-02-28 12:42:50 -05:00
Andy Cedilnik 9ca8035fc6 Fix return value problem 2003-02-17 10:30:13 -05:00
Andy Cedilnik d87595ede3 Add macro for checking if symbol exists 2003-01-12 22:28:32 -05:00