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Seeing all predefined macros
Create a file test.c that has one line in it:
int main(void) {}
Then compile with this command:
gcc -dM -E test.c
Even easier (I got an e-mail tip on this)
gcc -dM -E -
(Type in the above, press ENTER, then, in Unix, press CTRL-D, or from the Windows CMD line, press CTRL-Z or F6 followed by the ENTER key.)
(These work with any gcc port.)
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