问题
I'm trying to compile a client using hiredis in C on Mac OS X.
I've installed hiredis with:
brew install hiredis
But still get the error:
fatal error: 'hiredis.h' file not found
My hiredis.h is however in:
/usr/local/include/hiredis/hiredis.c
How do I tell the compiler this?
I'm compiling with:
gcc test.c -o test
回答1:
In your question you said hiredis.h is in /usr/local/include/hiredis/hiredis.c, which doesn't really make any sense.
Assuming you meant that your hiredis.h is in /usr/local/include/hiredis. You can do like:
gcc test.c -I/usr/local/include/hiredis -o test
Read about -I in this SO post.
UPDATE:
As mentioned by @EricPostpischil in comments, its a better idea to just include like:
#include < hiredis/hiredis.h>
I am still not sure if /usr/local/include is in default include path. If it is, well no need to do anything, just compile like:
gcc test.c -o test
and if it isn't,
gcc test.c -I/usr/local/include -o test
回答2:
If you have installed hiredis with homebrew, you can see what's in the package like this:
brew ls --verbose hiredis
/usr/local/Cellar/hiredis/0.14.0/INSTALL_RECEIPT.json
/usr/local/Cellar/hiredis/0.14.0/CHANGELOG.md
/usr/local/Cellar/hiredis/0.14.0/.brew/hiredis.rb
...
...
/usr/local/Cellar/hiredis/0.14.0/lib/libhiredis.dylib
/usr/local/Cellar/hiredis/0.14.0/lib/pkgconfig/hiredis.pc <--- PKG-CONFIG
/usr/local/Cellar/hiredis/0.14.0/lib/libhiredis.a
/usr/local/Cellar/hiredis/0.14.0/lib/libhiredis.0.14.dylib
...
...
And, as you can see, it gives you a pkg-config file with all the settings in it that you need. So, you might as well install pkg-config and do it properly!
brew install pkg-config
Now, if you want to know the C compiler flags for hiredis, you do:
pkg-config --cflags hiredis
-D_FILE_OFFSET_BITS=64 -I/usr/local/Cellar/hiredis/0.14.0/include/hiredis
And if you want to know the linker settings, you do:
pkg-config --libs hiredis
-L/usr/local/Cellar/hiredis/0.14.0/lib -lhiredis
And so, your compile-link command becomes very simple and updates itself when you update the packages:
gcc-9 $(pkg-config --cflags --libs hiredis) -o program program.c
来源：https://stackoverflow.com/questions/57607796/compile-hiredis-in-c-on-mac-os-x