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Diffstat (limited to 'Help/prop_dir/COMPILE_DEFINITIONS.rst')
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diff --git a/Help/prop_dir/COMPILE_DEFINITIONS.rst b/Help/prop_dir/COMPILE_DEFINITIONS.rst new file mode 100644 index 0000000..bc5f754 --- /dev/null +++ b/Help/prop_dir/COMPILE_DEFINITIONS.rst @@ -0,0 +1,39 @@ +COMPILE_DEFINITIONS +------------------- + +Preprocessor definitions for compiling a directory's sources. + +The COMPILE_DEFINITIONS property may be set to a semicolon-separated +list of preprocessor definitions using the syntax VAR or VAR=value. +Function-style definitions are not supported. CMake will +automatically escape the value correctly for the native build system +(note that CMake language syntax may require escapes to specify some +values). This property may be set on a per-configuration basis using +the name COMPILE_DEFINITIONS_<CONFIG> where <CONFIG> is an upper-case +name (ex. "COMPILE_DEFINITIONS_DEBUG"). This property will be +initialized in each directory by its value in the directory's parent. + +CMake will automatically drop some definitions that are not supported +by the native build tool. The VS6 IDE does not support definition +values with spaces (but NMake does). + +Disclaimer: Most native build tools have poor support for escaping +certain values. CMake has work-arounds for many cases but some values +may just not be possible to pass correctly. If a value does not seem +to be escaped correctly, do not attempt to work-around the problem by +adding escape sequences to the value. Your work-around may break in a +future version of CMake that has improved escape support. Instead +consider defining the macro in a (configured) header file. Then +report the limitation. Known limitations include: + +:: + + # - broken almost everywhere + ; - broken in VS IDE 7.0 and Borland Makefiles + , - broken in VS IDE + % - broken in some cases in NMake + & | - broken in some cases on MinGW + ^ < > \" - broken in most Make tools on Windows + +CMake does not reject these values outright because they do work in +some cases. Use with caution. |