https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65255
Bug ID: 65255
Summary: std::thread does not work for cross compiling on ARM
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: yyc1992 at gmail dot com
Created attachment 34903
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34903&action=edit
PKGBUILD used to compile the cross compiling version of gcc
Duplicate of the problem reported in the comment of #42734. However, IMHO, that
bug was tracking a different issue and it should be better to open a new bug
for this one although the error message produced at runtime are very similar.
See attached file for the script used to compile the cross-compiler
(CHOST=x86_64-unknown-linux-gnu).
Minimum source that produces the problem
```
#include <thread>
int
main()
{
std::thread([] {}).join();
return 0;
}
```
When compiling with `arm-linux-gnueabihf-g++` on x86_64 and run on arm, it
throws an runtime error
```
pure virtual method called
terminate called without an active exception
Aborted (core dumped)
```
However, the error disappeared if run with gdb....
The same source works on the host machine (x86_64), with clang cross compiling
on ARM and with both clang and gcc natively compiled on ARM. Adding `-latomic`
as suggested in #42734 does not help either and is also not needed using the
native compiler on arm.
Command line option used to compile:
gcc cross compile:
arm-linux-gnueabihf-g++ -pthread -std=c++14 -Os -Wall -Wextra thread.cpp -o
thread-arm
clang cross compile:
clang++ --target=arm-linux-gnueabihf -pthread -std=c++14 -Os -Wall -Wextra
thread.cpp -o thread-arm_clang -I
/usr/arm-linux-gnueabihf/include/c++/4.9.2/arm-linux-gnueabihf
gcc native compile (on ARM):
g++ -pthread -std=c++14 -Os -Wall -Wextra thread.cpp -o thread-arm_native
clang native compile (on ARM):
clang++ -pthread -std=c++14 -Os -Wall -Wextra thread.cpp -o
thread-arm_native_clang
I'll try to upload the binaries (if they are allowed) or the output of `objdump
-S` (if I cannot upload binaries).
