debug info for MACRO not produced

[2094601b-373c-43bf-9fad-2557fa9f70d5]

Bugzilla Link	14152
Version	trunk
OS	MacOS X
Blocks	llvm/llvm-bugzilla-archive#24345
Attachments	bitcode file
CC	@adrian-prantl,@echristo,@zygoloid

Extended Description

Consider the test:

$ cat test2.c

define ADD1(x) (x+1)

int n = 0; int main(int argc) { int n = ADD1(argc); return n; }

Macro ADD1 is not mentioned in debug info for test2.c. Are there any plans on adding debug info for macros in clang?

Compilation line: clang -g -O0 test2.c -emit-llvm -o test2.bc -S

Olga Chupina

Software Engineer Intel Compiler Team Intel Corp.

[llvmbot]

mentioned in issue llvm/llvm-bugzilla-archive#24345

[llvmbot]

Debug info macros is already support in dwarf4 format starting from revision 294637.

In order to enable debug info macros you can use -fdebug-macro flag with -g. In fact, this flag will work with all debug info flags other than -g0.

If we want to be compatible with GCC, we need to enable debug info macros when using -g3. To do that, we need to map "-g3" to "-cc1 -debug-info-macro -debug-info-kind=standalone".

I am not planing to do that though.

Regards, Amjad

[echristo]

I'm not planning (and don't know of anyone planning) to do this anytime soon, no.

[lattner]

I don't know of anyone planning to do this, but it is generally only produced when using "-g3" since it bloats generated debug information significantly.