[Bug target/16350] gcc only understands little endian ARM systems
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16350 Sam Thursfield changed: What|Removed |Added CC||sam.thursfield at codethink ||dot co.uk --- Comment #30 from Sam Thursfield 2013-01-09 11:36:46 UTC --- I hit this bug trying to build a GCC 4.6.2 that defaulted to ARMv7-a big-endian. Correct code would only be produced if "-mbig-endian" was passed during linking so that the --be8 flag was passed to the linker, but this meant that the compiler on my target system defaulted to producing code that didn't work on the target system -- not pretty. This particular issue has been fixed in 4.7.3 and later, however: 2012-07-25 Bharathi Seshadri Jim Wilson * config/arm/bpabi.h (BE8_LINK_SPEC): Set according to TARGET_BIG_ENDIAN_DEFAULT. >From http://gcc.gnu.org/git/gcc.git: commit c6e19dd6c296449f6d9e54d630f8198acf103d24 Author: wilson Date: Wed Jul 25 20:13:46 2012 + Pass -be8 by default for armv7-a when configured big-endian. config/arm/bpabi.h (BE8_LINK_SPEC): Set according to TARGET_BIG_ENDIAN_DEFAULT. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@189867 138bc75d-0d04-0410-961f-82ee72b054a4 Backporting this patch to 4.6.2 means that I now have a compiler that produces correct code just from appending "eb" to the CPU in the target triplet and configuring GCC with the correct --with-arch= flag.
[Bug target/16350] gcc only understands little endian ARM systems
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16350 --- Comment #31 from Sam Thursfield 2013-01-09 11:46:59 UTC --- Ignore the comment about GCC 4.7.3, which doesn't even exist. Looks like the fix is only in trunk so far.
[Bug libstdc++/82033] New: C++11 library doesn't work on AIX if GCC is built with --disable-bootstrap
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82033
Bug ID: 82033
Summary: C++11 library doesn't work on AIX if GCC is
built with --disable-bootstrap
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: sam.thursfield at codethink dot co.uk
Target Milestone: ---
Host: powerpc-ibm-aix7.1.0.0
Target: powerpc-ibm-aix7.1.0.0
Build: powerpc-ibm-aix7.1.0.0
Here's a simple testcase:
```
#include
#include
#include
using namespace std;
void task1(string msg)
{
cout << "task1 says: " << msg;
}
int main()
{
std::thread t1(task1, "Hello");
t1.join();
}
```
This builds fine using `g++ -std=c++11 -pthread`. *Unless* you built the
compiler with `--disable-bootstrap`. In that case, it fails:
```threadtest.cpp: In function 'int main()':
threadtest.cpp:16:10: error: 'thread' is not a member of 'std'
std::thread t1(task1, "Hello");
^~
threadtest.cpp:16:10: note: suggested alternative: 'tera'
std::thread t1(task1, "Hello");
^~
tera
threadtest.cpp:19:5: error: 't1' was not declared in this scope
t1.join();
^~
threadtest.cpp:19:5: note: suggested alternative: 'tm'
t1.join();
^~
tm
```
[Bug libstdc++/82033] C++11 library doesn't work on AIX if GCC is built with --disable-bootstrap
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82033 --- Comment #2 from Sam Thursfield --- Sorry, I really thought I'd tracked down the correct cause before reporting the bug, but it seems something else I'm doing is breaking the library.
[Bug libstdc++/82033] C++11 library doesn't work on AIX if GCC is built with --disable-bootstrap
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82033 Sam Thursfield changed: What|Removed |Added Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #3 from Sam Thursfield --- This was me jumping to conclusions, sorry.
[Bug libstdc++/82033] C++11 library doesn't work on AIX if GCC is built with --disable-bootstrap
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82033 --- Comment #4 from Sam Thursfield --- For posterity, the actual cause of my issue was passing `--disable-multilib` to configure. It's pretty clear why this broke some threading stuff -- 'pthread' is a whole separate set of libs on AIX.
