https://bugs.llvm.org/show_bug.cgi?id=43982
Bug ID: 43982
Summary: clang -frewrite-includes fails to remove __has_include
if behind a macro.
Product: clang
Version: 9.0
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: emi...@crisal.io
CC: htmldevelo...@gmail.com, llvm-bugs@lists.llvm.org,
neeil...@live.com, richard-l...@metafoo.co.uk
Created attachment 22801
--> https://bugs.llvm.org/attachment.cgi?id=22801&action=edit
test-case.cpp
Minimal test-case attached. STR:
$ touch t.h
$ clang -frewrite-includes -E test-case.cpp > pre-processed.cpp
$ rm t.h
$ clang pre-processed.cpp
t.cpp:10:3: error: use of undeclared identifier 'std'
std::cout << "Hello world" << std::endl;
^
t.cpp:10:33: error: use of undeclared identifier 'std'
std::cout << "Hello world" << std::endl;
This is because:
* The __has_include check is not removed when expanding, and...
* The second <iostream> expansion is suppressed.
This is causing problems when building Firefox on Linux with distributed
compilers, because glibc has started using this pattern:
https://sourceware.org/ml/libc-alpha/2019-06/msg00254.html
I plan to try and submit a glibc workaround, but it'd be great if it wasn't
needed :)
--
You are receiving this mail because:
You are on the CC list for the bug._______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
