On 2018-03-02 01:54, Magnus Ihse Bursie wrote:


I actually don't know of any cases where CFLAGS ordering is relevant. (LIBS is another issue) It's good to be aware of such issues, so please enlighten me. :-)
If you have a flag that enables a feature and the corresponding disabling flag of the same, like -Wfoo -Wno-foo, then the latter overrides the former. Change the order and you get the opposite behavior.

-I directories are searched in order so if the same header name is found in multiple directories, you get differences.

/Erik

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