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Home » Language IDEs » C / C++ IDE (CDT) » #ifdef Symbol are not responding to -Dsymbol settings through Properties(#ifdef Symbol are not responding to -Dsymbol settings through Properties)

#ifdef Symbol are not responding to -Dsymbol settings through Properties [message #1431021]

Thu, 25 September 2014 01:38

Eclipse User

I am having difficulty getting conditional compilation to work on Keppler Eclipse/CDT on an Ubuntu 13.04 PC. The -D symbols entered in Properties > C/C++ Build > Settings > GCC C++ Compiler > Preprocessor and ..Settings > GCC C Compiler > Symbols do not seem to have any effect on #ifdefs in the code, nor do they appear as -DSymbol in the console output of a build.

I should mention the C code has some C++ I/O, so "*.c", "*.h" as c++ sources have been added in Properties > C/C++ General filters.

Any ideas as to what I am missing?

Re: #ifdef Symbol are not responding to -Dsymbol settings through Properties [message #1432149 is a reply to message #1431021]

Fri, 26 September 2014 14:00

Eclipse User

Doh!

Solved the #ifdef problem:
Properties C/C++ General > Indexer:
* check "Enable specific project settings"
* check "use active build configuration"

Not sure why the default settings were set to "use a fixed build configuration", which caused the problem when I switched to build configuration with different symbols defined. These were ignored.

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