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Check*CompilerFlag: Document use of CMAKE_REQUIRED_DEFINITIONS (#14309)

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Explain how CMAKE_REQUIRED_DEFINITIONS is set before calling the
check_*_source_compiles macros.
This commit is contained in:
Brad King 2013-07-25 08:25:15 -04:00
parent 828ddb6813
commit 3e79d656da
2 changed files with 7 additions and 5 deletions
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5
Modules/CheckCCompilerFlag.cmake
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@ -2,9 +2,10 @@
# CHECK_C_COMPILER_FLAG(<flag> <var>)
# <flag> - the compiler flag
# <var> - variable to store the result
# This internally calls the check_c_source_compiles macro.
# This internally calls the check_c_source_compiles macro and
# sets CMAKE_REQUIRED_DEFINITIONS to <flag>.
# See help for CheckCSourceCompiles for a listing of variables
# that can modify the build.
# that can otherwise modify the build.
#=============================================================================
# Copyright 2006-2011 Kitware, Inc.

7
Modules/CheckCXXCompilerFlag.cmake
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@ -2,9 +2,10 @@
# CHECK_CXX_COMPILER_FLAG(<flag> <var>)
# <flag> - the compiler flag
# <var> - variable to store the result
# This internally calls the check_cxx_source_compiles macro. See help
# for CheckCXXSourceCompiles for a listing of variables that can
# modify the build.
# This internally calls the check_cxx_source_compiles macro and
# sets CMAKE_REQUIRED_DEFINITIONS to <flag>.
# See help for CheckCXXSourceCompiles for a listing of variables
# that can otherwise modify the build.
#=============================================================================
# Copyright 2006-2010 Kitware, Inc.