[cfe-dev] Function declaration not seen

[Richard Smith]

On Mon, Mar 31, 2014 at 2:03 PM, Andrea D'Amore <and.damore at macports.org>wrote:

> Hello,
> I'm building neovim [1] on OS X 10.9.2 using clang from XCode 5.1, the
> --version output is:
>   > clang --version
>   Apple LLVM version 5.1 (clang-503.0.38) (based on LLVM 3.4svn)
>   Target: x86_64-apple-darwin13.1.0
>   Thread model: posix
>
> When building the repo at the specific revision in [2] I'm getting the
> following error when makefile tries to compile src/os/input.c:
>
> ### START OF PASTE
> [ 95%] Building C object src/CMakeFiles/nvim.dir/os/input.c.o
> cd /tmp/neovim-git/build/src && /usr/bin/cc  -DHAVE_CONFIG_H -g
> -I/opt/local/include -I/tmp/neovim-git/.deps/usr/include
> -I/tmp/neovim-git/.deps/usr/include/luajit-2.0
> -I/tmp/neovim-git/build/config -I/tmp/neovim-git/src
> -I/tmp/neovim-git/src/proto    -Werror -Wall -Wextra -pedantic
> -Wno-unused-parameter -std=gnu99 -o CMakeFiles/nvim.dir/os/input.c.o
> -c /tmp/neovim-git/src/os/input.c
> /tmp/neovim-git/src/os/input.c:194:3: error: implicit declaration of
> function 'settmode' is invalid in C99
> [-Werror,-Wimplicit-function-declaration]
>   settmode(TMODE_COOK);
>   ^
> /tmp/neovim-git/src/os/input.c:194:3: note: did you mean 'setmode'?
> /usr/include/unistd.h:695:7: note: 'setmode' declared here
> void    *setmode(const char *) __DARWIN_ALIAS_STARTING(__MAC_10_6,
> __IPHONE_2_0, __DARWIN_ALIAS(setmode));
>          ^
> 1 error generated.
> make[3]: *** [src/CMakeFiles/nvim.dir/os/input.c.o] Error 1
> make[2]: *** [src/CMakeFiles/nvim.dir/all] Error 2
> make[1]: *** [all] Error 2
> make: *** [nvim] Error 2
> ### END OF PASTE
>
>
> Function   void setterm(int)   is correctly declared in src/term.h and
> defined in src/term.c, also input.c is including src/term.h but if
> -I/opt/local/include comes before -I/tmp/neovim-git/src clang cannot
> see the setterm() declaration at all, also it suggest that it may be a
> typo for seterm() in unistd.h instead.
>
> If I move  -I/opt/local/include   after   -I/tmp/neovim-git/src   then
> input.c source file is correctly compiled.
>
> Is it correct for clang to not check in directories specified with
> following -I args for an exact match for the function prototype?
> Is the likeness of   seterm()   name tricking clang?
>

If there's a term.h in /opt/local/include, and input.c says

  #include "term.h"

then it's correct for Clang to find that one. #include only includes one
file, not all files on all include paths with the specified name.


> Best regards
>
> [1] http://neovim.org/
> [2] https://github.com/neovim/neovim/tree/54782ecf
>
> --
> Andrea
> _______________________________________________
> cfe-dev mailing list
> cfe-dev at cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
>
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