'attribute ignored' message from analyzer

[rizsotto]

hi All,

would like to know is it possible to get the same warning while run the analyzer as it was produce by simple compilation?

when i give this input test.c

typedef int __attribute__((visibility("default"))) bar;

and run Clang against it, i get this warning...

$ clang -c test.c 
test.c:1:28: warning: 'visibility' attribute ignored [-Wignored-attributes]
typedef int __attribute__((visibility("default"))) bar;
                          ^
1 warning generated.

but when i run the analyzer, i got nothing like that

$ clang -### --analyze -x c test.c 

then i execute the last line of this output

$ "clang" "-cc1" ....

and it does not generate the warning. my question would be: is it possible to get that warning by passing some extra flags? or it will never appear during the analysis? thanks for any help.

[rizsotto]

comment from Nikola Smiljanić:

Try playing with -ccc-print-phases. I'm not sure if there's a way to start both analyzer and compiler action. Compiler action is what reports the warning, you can enable just this action with -fsyntax-only. But passing both --analyze and -fsyntax-only doesn't seem to work.

[rizsotto]

no solution here... all i can see that the compiler phase make the warning.

this suppose to generate the warning.

$ clang -ccc-print-phases -x c not_used_attributes.c 
0: input, "not_used_attributes.c", c
1: preprocessor, {0}, cpp-output
2: compiler, {1}, assembler
3: assembler, {2}, object
4: linker, {3}, image

while the analyzer is silent.

$ clang --analyze -ccc-print-phases -x c not_used_attributes.c 
0: input, "not_used_attributes.c", c
1: preprocessor, {0}, cpp-output
2: analyzer, {1}, plist

and syntax check also generate the expected warning.

$ clang -fsyntax-only -ccc-print-phases -x c not_used_attributes.c 
0: input, "not_used_attributes.c", c
1: preprocessor, {0}, cpp-output
2: compiler, {1}, none