Hello all, I want to modify an existing package witch is a cgo binding around a C library. it’s nearly done and already working, but I want to make it cross-platform and want to change things (or at least understand well) in the starting CFLAGS and LDFLAGS. (I’m on Windows actually) I spend most …

CFLAGS and LDFLAGS are a convention that comes from the predefined rules for Makefiles . I will give a brief example to demonstrate how they work. Unfortunately I don’t have a Windows system handy, and so had to make do with my macOS system. Since the example is for explanation instead of something f…

Thanks a lot @nathankerr for your reply. I will look at the examples tonight… I’m using TDM-GCC, so MinGW-w64. I understand that it should be in compiler documentation and I search this way too. but if you look at my second link, it seems that those flags are “originated from Unix OS family” and n…

TDM-GCC is based on GCC 5.1.0 (assuming that is the latest version), so the gcc 5.1.0 documentation is what you are looking for.

thanks, but already looked there… I found a few tags I recognized for having already seen them on CFLAGS or LDFLAGS in example packages, but except for that, I don’t know what I’m looking for and there’s no section about “CFLAGS” or “LDFLAGS”, so too complicated to find something useful in here. I…

There is no section for CFLAGS or LDFLAGS because these are not concepts gcc cares about. The contents of these variables are just the command line options for the compiler (which I linked to). Compilers are complicated things, so they have lots of options. usb.go is a nice example of setting those…

ok, thanks a lot… will do more try and search with that doc. not on my computer here, so maybe just that simple example for witch I didn’t find info : // #cgo amd64 386 CFLAGS: -DX86=1 and here, I don’t know what is this DX86 one… I found other uses witch make me think it could be related with op…

-DX86=1 defines a macro , X86, as 1.

ok, thanks. you’re right, I need to search more in GCC doc. so, just look rapidly here : https://gcc.gnu.org/onlinedocs/ I can download a PDF documentation an it’s easier to do searches across the whole doc. thanks again. :slight_smile: will try to read some parts of this doc, and will do try & …

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CFLAGS & LDFLAGS documentation somewhere?

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