[Cmake-commits] CMake branch, next, updated. v2.8.3-1325-ge6e1768

[Brad King]

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       via  840f9c055cba5f587e42b9118d0b9924d396275e (commit)
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- Log -----------------------------------------------------------------
http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=e6e176821389f1e97c9badadab1c8225bae40fff
commit e6e176821389f1e97c9badadab1c8225bae40fff
Merge: a3a4906 840f9c0
Author:     Brad King <brad.king at kitware.com>
AuthorDate: Wed Jan 12 08:58:54 2011 -0500
Commit:     CMake Topic Stage <kwrobot at kitware.com>
CommitDate: Wed Jan 12 08:58:54 2011 -0500

    Merge topic 'doc-CheckSymbolExists-enum' into next
    
    840f9c0 Document CheckSymbolExists more clearly (#11685)


http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=840f9c055cba5f587e42b9118d0b9924d396275e
commit 840f9c055cba5f587e42b9118d0b9924d396275e
Author:     Brad King <brad.king at kitware.com>
AuthorDate: Wed Jan 12 08:58:19 2011 -0500
Commit:     Brad King <brad.king at kitware.com>
CommitDate: Wed Jan 12 08:58:19 2011 -0500

    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.

diff --git a/Modules/CheckSymbolExists.cmake b/Modules/CheckSymbolExists.cmake
index 40910f2..2237f35 100644
--- a/Modules/CheckSymbolExists.cmake
+++ b/Modules/CheckSymbolExists.cmake
@@ -1,9 +1,16 @@
-# - Check if the symbol exists in include files
-# CHECK_SYMBOL_EXISTS(SYMBOL FILES VARIABLE)
+# - Check if a symbol exists as a function, variable, or macro
+# CHECK_SYMBOL_EXISTS(<symbol> <files> <variable>)
 #
-#  SYMBOL   - symbol
-#  FILES    - include files to check
-#  VARIABLE - variable to return result
+# Check that the <symbol> is available after including given header
+# <files> and store the result in a <variable>.  Specify the list
+# of files in one argument as a semicolon-separated list.
+#
+# If the header files define the symbol as a macro it is considered
+# available and assumed to work.  If the header files declare the
+# symbol as a function or variable then the symbol must also be
+# available for linking.  If the symbol is a type or enum value
+# it will not be recognized (consider using CheckTypeSize or
+# CheckCSourceCompiles).
 #
 # The following variables may be set before calling this macro to
 # modify the way the check is run:

-----------------------------------------------------------------------

Summary of changes:
 Modules/CheckSymbolExists.cmake |   17 ++++++++++++-----
 1 files changed, 12 insertions(+), 5 deletions(-)


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