CODEWITHSUNDEEP
c++gccmacrosclangmips
Shakal187
Shakal187

Reputation: 173

gcc flag to force use of predefined macros

My problem is following. I'm trying to build a project for mips. And when I download it from it's repository, there is no problem building it, but when I build it when it is a part of a larger project, I receive a folowing error:

error: expected ‘,’ or ‘...’ before numeric constant

I found out that it is a problem because some variable is called mips whereas the same variable is defined as predefined macro in gcc compiler.

#define mips 1

I verified it with:

mipsel-linux-gnu-g++ -dM -E - < /dev/null

So, my question is, does any body know is there a certain compiler flag or whatever, that forces the use of this macro? It is strange that there is no build problem when I download the same code from repository.

Both projects are build with the same toolchain, I already verified that.

Thanks for your help!

Upvotes: 4

Views: 1082

Answers (1)

MSalters
MSalters

Reputation: 179779

"When the -ansi option, or any -std option that requests strict conformance, is given to the compiler, all the system-specific predefined macros outside the reserved namespace are suppressed. The parallel macros, inside the reserved namespace, remain defined."

That is to say, with --ansi you still get __mips__ but not mips.

Upvotes: 3

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