[Bug c++/64697] C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 --- Comment #23 from Václav Haisman --- I am not sure what to report. I do not understand the background of linker and relocations enough. Also, I don't have access to Windows and Cygwin any more.
[Bug c++/64697] C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 --- Comment #20 from Václav Haisman --- Still an issue in 2018 with GCC 7.3.0.
[Bug c++/64697] C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 --- Comment #19 from Václav Haisman --- There appears to be some sort of interaction with the `inline` attribute of the `get_ptd()` function. If the `get_ptd()` function is just declared `extern` in `def.hxx` and defined in `def.cxx`, the link error goes away.
[Bug c++/64697] C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 --- Comment #18 from Václav Haisman --- And I have just verified it is still the same with GCC 6.3.0.
[Bug c++/64697] C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 --- Comment #17 from Václav Haisman --- This is still an issue in 2017 with GCC 5.4.0.
[Bug c++/64697] C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 Václav Haisman changed: What|Removed |Added Version|4.9.2 |5.3.0 --- Comment #16 from Václav Haisman --- And this still fails for me with GCC 5.3: `--> ./build.sh + g++ -std=gnu++11 -fvisibility=hidden -c use.cxx def.cxx + g++ -shared -o cygtest.dll use.o def.o use.o:use.cxx:(.text$_ZTWN1N3ptdE[_ZTWN1N3ptdE]+0x15): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd' collect2: error: ld returned 1 exit status .-(~/log4cplus-git/tls-test-case) `--> g++ -v Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-cygwin/5.3.0/lto-wrapper.exe Target: x86_64-pc-cygwin Configured with: /cygdrive/i/szsz/tmpp/gcc/gcc-5.3.0-3.x86_64/src/gcc-5.3.0/configure --srcdir=/cygdrive/i/szsz/tmpp/gcc/gcc-5.3.0-3.x86_64/src/gcc-5.3.0 --prefix=/usr --exec-prefix=/usr --localstatedir=/var --sysconfdir=/etc --docdir=/usr/share/doc/gcc --htmldir=/usr/share/doc/gcc/html -C --build=x86_64-pc-cygwin --host=x86_64-pc-cygwin --target=x86_64-pc-cygwin --without-libiconv-prefix --without-libintl-prefix --libexecdir=/usr/lib --enable-shared --enable-shared-libgcc --enable-static --enable-version-specific-runtime-libs --enable-bootstrap --enable-__cxa_atexit --with-dwarf2 --with-tune=generic --enable-languages=ada,c,c++,fortran,lto,objc,obj-c++ --enable-graphite --enable-threads=posix --enable-libatomic --enable-libcilkrts --enable-libgomp --enable-libitm --enable-libquadmath --enable-libquadmath-support --enable-libssp --enable-libada --enable-libgcj-sublibs --disable-java-awt --disable-symvers --with-ecj-jar=/usr/share/java/ecj.jar --with-gnu-ld --with-gnu-as --with-cloog-include=/usr/include/cloog-isl --without-libiconv-prefix --without-libintl-prefix --with-system-zlib --enable-linker-build-id --with-default-libstdcxx-abi=gcc4-compatible Thread model: posix gcc version 5.3.0 (GCC)
[Bug other/17239] gcc_update not being writable while it is running
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=17239 Václav Haisman changed: What|Removed |Added Version|5.3.0 |4.0.0 --- Comment #3 from Václav Haisman --- Bugzilla is evil. I am reverting the previous unintentional change.
[Bug c++/64697] C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 --- Comment #11 from Václav Zeman --- Created attachment 37638 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37638=edit logs of compilation with -fno-lto (In reply to H.J. Lu from comment #8) > Your compiler doesn't have proper LTO support. Please turn it > off with -fno-lto.
[Bug c++/64697] C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 --- Comment #13 from Václav Haisman --- Created attachment 37643 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37643=edit objdump -r use.o log (In reply to H.J. Lu from comment #12) > Please provide the output of "objdump -r use.o".
[Bug c++/64697] C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 --- Comment #14 from Václav Haisman --- Created attachment 37644 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37644=edit objdump -Ttr def.o log `objdump -Ttr def.o` in advance, just in case it is relevant.
[Bug c++/64697] C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 --- Comment #9 from Václav Zeman --- (In reply to H.J. Lu from comment #8) > Your compiler doesn't have proper LTO support. Please turn it > off with -fno-lto. How/why is it improper?
[Bug c++/64697] C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 --- Comment #6 from Václav Zeman --- Created attachment 37630 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37630=edit logs requested by #5 comment Here is the linking -v output and ld -V output.
[Bug c++/64697] C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 --- Comment #7 from Václav Zeman --- Created attachment 37631 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37631=edit logs after complete recompilation logs after complete recompilation
[Bug c++/35167] problem with function address constant non-type template parameter in template
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35167 Václav Zeman vhaisman at gmail dot com changed: What|Removed |Added Target|i386-portbld-freebsd6.3 | Host|i386-portbld-freebsd6.3 | Version|4.3.0 |4.9.1 Known to fail||4.9.1 Build|i386-portbld-freebsd6.3 | --- Comment #10 from Václav Zeman vhaisman at gmail dot com --- This still fails in 4.9.1.
[Bug c++/60367] Default argument object is not getting constructed
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60367 Václav Zeman vhaisman at gmail dot com changed: What|Removed |Added CC||vhaisman at gmail dot com --- Comment #13 from Václav Zeman vhaisman at gmail dot com --- This bug appears to be affecting 4.7.x series as well. Is there a chance to get this fixed for 4.7 as well? http://stackoverflow.com/questions/28837142/stdmap-argument-with-default-empty-map-segfaults-in-gcc
[Bug c++/64697] New: C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697
Bug ID: 64697
Summary: C++11 thread_local: relocation truncated to fit:
R_X86_64_PC32 against undefined symbol `TLS init
function for N::ptd'
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vhaisman at gmail dot com
I have hit an issue with thread-local storage variables on
Cygwin/AMD64, I do not see it with Cygwin/i686.
I am having linking issues when using `thread_local` keyword in Cygwin
with its GCC 4.8.3 and GCC 4.9.2. This is derived from log4cplus. The
test case is split into three files:
File def.hxx:
#include string
namespace N
{
struct S { std::string str; };
// extern declaration in a header
extern thread_local S * ptd;
// accessing the extern declared ptd here
inline
S * get_ptd ()
{
if (! ptd)
ptd = new S;
return ptd;
}
} // namespace N
File def.cxx:
#include def.hxx
namespace N
{
// definition of ptd
thread_local S * ptd = nullptr;
} // namespace N
~~~
File use.cxx:
#include def.hxx
namespace N
{
__declspec(dllexport)
void * foo ()
{
// invoking inline get_ptd() function to get the value in ptd
return get_ptd ();
}
}
Now, when I compile each .cxx with `g++ -std=gnu++11
-fvisibility=hidden -c use.cxx def.cxx` and then try to link with `g++
-shared -o cygtest.dll use.o def.o`, I get the following error from
linker:
use.o:use.cxx:(.text$_ZTWN1N3ptdE[_ZTWN1N3ptdE]+0x15): relocation
truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init
function for N::ptd'
collect2: error: ld returned 1 exit status
The nm -C ./def.o output confirms that:
`-- nm -C ./def.o
b .bss
d .data
r .rdata
r .rdata$zzz
t .text
0008 r __emutls_t._ZN1N3ptdE
D __emutls_v._ZN1N3ptdE
r std::piecewise_construct
As you can see, the ptd thread-local variable initialization function
is not defined anywhere. The use.o references this initialization
function (see bottom of the listing):
`-- nm -C ./use.o
b .bss
d .data
i .drectve
p .pdata
p .pdata$_ZN1N1SC1Ev
p .pdata$_ZN1N7get_ptdEv
p .pdata$_ZTWN1N3ptdE
r .rdata
r .rdata$.refptr.__emutls_v._ZN1N3ptdE
r .rdata$.refptr._ZTHN1N3ptdE
r .rdata$zzz
R .refptr.__emutls_v._ZN1N3ptdE
R .refptr._ZTHN1N3ptdE
t .text
t .text$_ZN1N1SC1Ev
t .text$_ZN1N7get_ptdEv
t .text$_ZTWN1N3ptdE
A .weak._ZTHN1N3ptdE._ZN1N1SC1Ev
r .xdata
r .xdata$_ZN1N1SC1Ev
r .xdata$_ZN1N7get_ptdEv
r .xdata$_ZTWN1N3ptdE
U __emutls_get_address
U __emutls_v._ZN1N3ptdE
U __gxx_personality_seh0
U __real__ZdlPv
U __real__Znwm
U _Unwind_Resume
U operator delete(void*)
T N::S::S()
T N::foo()
T N::get_ptd()
U std::basic_stringchar, std::char_traitschar,
std::allocatorchar ::basic_string()
U operator new(unsigned long)
r std::piecewise_construct
w TLS init function for N::ptd
T TLS wrapper function for N::ptd
Now, this code seems to work well on Linux with both GCC and Clang.
Is this a GCC problem on Cygwin?
Am I using extern thread_local wrong?
My experiments show that not using the extern keyword seems to fix the
issue. But I am not sure if that does not introduce two ptd
thread-local variables in two TUs.
See also http://stackoverflow.com/q/28023728/341065
[Bug c++/64697] C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 --- Comment #1 from Václav Zeman vhaisman at gmail dot com --- Created attachment 34503 -- https://gcc.gnu.org/bugzilla/attachment.cgi?id=34503action=edit def.hxx
[Bug c++/64697] C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 --- Comment #2 from Václav Zeman vhaisman at gmail dot com --- Created attachment 34504 -- https://gcc.gnu.org/bugzilla/attachment.cgi?id=34504action=edit def.cxx
[Bug c++/64697] C++11 thread_local: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS init function for N::ptd'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64697 --- Comment #3 from Václav Zeman vhaisman at gmail dot com --- Created attachment 34505 -- https://gcc.gnu.org/bugzilla/attachment.cgi?id=34505action=edit use.cxx
[Bug c++/63779] g++ 4.9 generates invalid object provoking a GOT relative relocation must reference a local symbol linker error on SunOS
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63779 --- Comment #4 from Václav Zeman vhaisman at gmail dot com --- I think I am experiencing same or similar issue with GCC 4.8.2 on Oracle Solaris 11.2 Express (i386). This is a snippet from log4cplus build. Almost all of these are related to __gthread* symbols but I also get some typeinfo symbols there. ld: fatal: relocation error: R_386_GOTOFF: file src/.libs/liblog4cplus_la-global-init.o: symbol __gthread_active: a GOT relative relocation must reference a local symbol ld: fatal: relocation error: R_386_GOTOFF: file src/.libs/liblog4cplus_la-global-init.o: symbol __gthread_active_p()::__gthread_active_mutex: a GOT relative relocation must reference a local symbol
[Bug c++/63779] g++ 4.9 generates invalid object provoking a GOT relative relocation must reference a local symbol linker error on SunOS
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63779 --- Comment #6 from Václav Zeman vhaisman at gmail dot com --- Created attachment 34370 -- https://gcc.gnu.org/bugzilla/attachment.cgi?id=34370action=edit preprocessed source for global-init.cxx
[Bug c++/63779] g++ 4.9 generates invalid object provoking a GOT relative relocation must reference a local symbol linker error on SunOS
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63779 --- Comment #7 from Václav Zeman vhaisman at gmail dot com --- Created attachment 34371 -- https://gcc.gnu.org/bugzilla/attachment.cgi?id=34371action=edit resulting .o file
[Bug c++/63779] g++ 4.9 generates invalid object provoking a GOT relative relocation must reference a local symbol linker error on SunOS
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63779 --- Comment #5 from Václav Zeman vhaisman at gmail dot com --- Created attachment 34369 -- https://gcc.gnu.org/bugzilla/attachment.cgi?id=34369action=edit assembler source
[Bug libstdc++/62200] New: libstdc++ initialization priority
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62200
Bug ID: 62200
Summary: libstdc++ initialization priority
Product: gcc
Version: 4.8.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: vhaisman at gmail dot com
I am trying to initialize my library early using the `init_priority` attribute.
Some paths of my library's initialization might try to print warnings and/or
errors. I have hit a SIGSEGV with the following test case, which uses
std::cerr. According to some, the library should initialize with priority 101.
If this were the case I would expect the test case to work flawlessly.
#include iostream
struct S1
{
S1() { std::cerr __FUNCTION__ \n; }
} static s1 __attribute__ ((__init_priority__ (65535/2)));
int
main ()
{
return 0;
}
The stack trace is
#0 0x77b6a559 in std::ostream::sentry::sentry(std::ostream) ()
from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#1 0x77b6ac19 in std::basic_ostreamchar, std::char_traitschar
std::__ostream_insertchar, std::char_traitschar (std::basic_ostreamchar,
std::char_traitschar , char const*, long)
() from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#2 0x77b6b077 in std::basic_ostreamchar, std::char_traitschar
std::operator std::char_traitschar (std::basic_ostreamchar,
std::char_traitschar , char const*) ()
from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#3 0x0040081d in S1::S1 (this=0x601172 s1) at test.cxx:5
#4 0x004007d6 in __static_initialization_and_destruction_0
(__initialize_p=1, __priority=32767) at test.cxx:6
#5 0x004007eb in _GLOBAL__sub_I.32767_main(void) () at test.cxx:13
#6 0x0040087d in __libc_csu_init ()
#7 0x77731e55 in __libc_start_main (main=0x40077d main(), argc=1,
argv=0x7fffe2c8, init=0x400830 __libc_csu_init, fini=optimized out,
rtld_fini=optimized out,
stack_end=0x7fffe2b8) at libc-start.c:246
#8 0x004006b9 in _start ()
[Bug libstdc++/62200] libstdc++ initialization priority
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62200 --- Comment #1 from Václav Zeman vhaisman at gmail dot com --- And it dumps core on Cygwin as well.
[Bug libstdc++/41495] libstdc++ --enable-clocale=ieee_1003.1-2001 fails
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=41495 Václav Zeman vhaisman at gmail dot com changed: What|Removed |Added CC||vhaisman at gmail dot com --- Comment #11 from Václav Zeman vhaisman at gmail dot com --- I have started working on this but I have never finished. If anybody is interested, the work is available at https://github.com/wilx/gcc/compare/gcc-mirror:master...posix-2008-locale. The branch is a bit misnamed because I had to use some Darwin extensions instead of only POSIX 2008 functions.
[Bug rtl-optimization/49358] optimization regression in 4.7.0, 4.6.1 from 4.5.4
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49358 --- Comment #3 from Václav Zeman vhaisman at gmail dot com --- And still a problem with gcc version 4.8.1 (Ubuntu/Linaro 4.8.1-10ubuntu9).
[Bug lto/57715] lto1.exe: internal compiler error: in add_symbol_to_partition
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57715 Václav Zeman vhaisman at gmail dot com changed: What|Removed |Added CC||vhaisman at gmail dot com --- Comment #3 from Václav Zeman vhaisman at gmail dot com --- Created attachment 32421 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=32421action=edit preprocessed source
[Bug lto/57715] lto1.exe: internal compiler error: in add_symbol_to_partition
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57715 --- Comment #4 from Václav Zeman vhaisman at gmail dot com --- (In reply to Tobias Burnus from comment #2) This PR might have the same reason as PR60567. Namely, your GCC has not been compiled on a system with working linker plugin - and thus, lto1 is not invoked with -fresolution=. Try compiling with -fuse-linker-plugin - if that gives an error, try a GCC which has been configured with --with-plugin-ld= pointing to a newer Binutils - 2.21 or newer. If that helps, it is a duplicate of PR60567. I was able to (manually) reduce the test to g++ -r -nostdlib src/.libs/liblog4cplus_la-rootlogger.ii -flto -o .libs/cyglog4cplus-1-2-2.dll The preprocessed file is attached compressed. If it doesn't help: Create a reduced test case as described at http://gcc.gnu.org/wiki/A_guide_to_testcase_reduction#Reducing_LTO_bugs
[Bug lto/57715] lto1.exe: internal compiler error: in add_symbol_to_partition
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57715 --- Comment #5 from Václav Zeman vhaisman at gmail dot com --- (In reply to Václav Zeman from comment #4) (In reply to Tobias Burnus from comment #2) This PR might have the same reason as PR60567. Namely, your GCC has not been compiled on a system with working linker plugin - and thus, lto1 is not invoked with -fresolution=. Try compiling with -fuse-linker-plugin - if that gives an error, try a GCC which has been configured with --with-plugin-ld= pointing to a newer Binutils - 2.21 or newer. If that helps, it is a duplicate of PR60567. I was able to (manually) reduce the test to g++ -r -nostdlib src/.libs/liblog4cplus_la-rootlogger.ii -flto -o .libs/cyglog4cplus-1-2-2.dll The preprocessed file is attached compressed. If it doesn't help: Create a reduced test case as described at http://gcc.gnu.org/wiki/A_guide_to_testcase_reduction#Reducing_LTO_bugs Oops! All of this should have gone to PR 56963 instead.
[Bug lto/56963] GCC 4.8.0 LTO issue: lto1: internal compiler error: in add_symbol_to_partition, at lto/lto-partition.c:284
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56963 --- Comment #7 from Václav Zeman vhaisman at gmail dot com --- Created attachment 32422 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=32422action=edit preprocessed source
[Bug lto/56963] GCC 4.8.0 LTO issue: lto1: internal compiler error: in add_symbol_to_partition, at lto/lto-partition.c:284
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56963 --- Comment #6 from Václav Zeman vhaisman at gmail dot com --- (In reply to Tobias Burnus from comment #5) This PR might have the same reason as PR60567. Namely, your GCC has not been compiled on a system with working linker plugin - and thus, lto1 is not invoked with -fresolution=. Try compiling with -fuse-linker-plugin - if that gives an error, try a GCC which has been configured with --with-plugin-ld= pointing to a newer Binutils - 2.21 or newer. If that helps, it is a duplicate of PR60567. I was able to (manually) reduce the test to g++ -r -nostdlib src/.libs/liblog4cplus_la-rootlogger.ii -flto -o .libs/cyglog4cplus-1-2-2.dll The preprocessed file is attached compressed. If it doesn't help: Create a reduced test case as described at http://gcc.gnu.org/wiki/A_guide_to_testcase_reduction#Reducing_LTO_bugs
[Bug lto/56963] GCC 4.8.0 LTO issue: lto1: internal compiler error: in add_symbol_to_partition, at lto/lto-partition.c:284
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56963 --- Comment #8 from Václav Zeman vhaisman at gmail dot com --- BTW, the current version with which I have reduced the test case is this: `-- g++ -v Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-pc-cygwin/4.8.2/lto-wrapper.exe Target: i686-pc-cygwin Configured with: /cygdrive/i/szsz/tmpp/gcc4/gcc-4.8.2-2/src/gcc-4.8.2/configure --srcdir=/cygdrive/i/szsz/tmpp/gcc4/gcc-4.8.2-2/src/gcc-4.8.2 --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --libexecdir=/usr/libexec --datadir=/usr/share --localstatedir=/var --sysconfdir=/etc --libdir=/usr/lib --datarootdir=/usr/share --docdir=/usr/share/doc/gcc --htmldir=/usr/share/doc/gcc/html -C --build=i686-pc-cygwin --host=i686-pc-cygwin --target=i686-pc-cygwin --without-libiconv-prefix --without-libintl-prefix --enable-shared --enable-shared-libgcc --enable-static --enable-version-specific-runtime-libs --enable-bootstrap --disable-__cxa_atexit --with-dwarf2 --with-arch=i686 --with-tune=generic --disable-sjlj-exceptions --enable-languages=ada,c,c++,fortran,java,lto,objc,obj-c++ --enable-graphite --enable-threads=posix --enable-libatomic --enable-libgomp --disable-libitm --enable-libquadmath --enable-libquadmath-support --enable-libssp --enable-libada --enable-libjava --enable-libgcj-sublibs --disable-java-awt --disable-symvers --with-ecj-jar=/usr/share/java/ecj.jar --with-gnu-ld --with-gnu-as --with-cloog-include=/usr/include/cloog-isl --without-libiconv-prefix --without-libintl-prefix --with-system-zlib --libexecdir=/usr/lib Thread model: posix gcc version 4.8.2 (GCC)
[Bug lto/56088] [4.8/4.9 Regression] LTO error: error: inlining failed in call to always_inline ‘vswprintf’: recursive inlining
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56088 Václav Zeman vhaisman at gmail dot com changed: What|Removed |Added Status|RESOLVED|REOPENED Resolution|WORKSFORME |--- --- Comment #12 from Václav Zeman vhaisman at gmail dot com --- (In reply to Yuxuan Shui from comment #11) This is still reproducible in GCC 4.8.2 on Gentoo when compiling packages like findutils. I am reopening this then.
[Bug c++/59348] New: ieee_1003.1-2001/messages_members.cc does not compile with _GLIBCXX_USE_WCHAR_T defined
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59348 Bug ID: 59348 Summary: ieee_1003.1-2001/messages_members.cc does not compile with _GLIBCXX_USE_WCHAR_T defined Product: gcc Version: 4.9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: vhaisman at gmail dot com Created attachment 31334 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=31334action=edit patch The ieee_1003.1-2001/messages_members.cc file does not compile with _GLIBCXX_USE_WCHAR_T defined. The messageswchar_t::do_get() function is missing parameter names. Fixing patch is attached.
[Bug c++/58999] sizeof ...(T) is very slow than clang
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58999 --- Comment #2 from Václav Zeman vhaisman at gmail dot com --- You should probably add the complete test case as an attachment.
[Bug c++/56963] GCC 4.8.0 LTO issue: lto1: internal compiler error: in add_symbol_to_partition, at lto/lto-partition.c:284
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56963 --- Comment #3 from Václav Zeman vhaisman at gmail dot com 2013-04-19 08:54:59 UTC --- I have broken the file on the Google Drive. Here is another copy of the same: https://docs.google.com/file/d/0B-WkLJEfYmSEdTZvdFVRR0E0dEE/edit?usp=sharing
[Bug c++/56963] New: GCC 4.8.0 LTO issue: lto1: internal compiler error: in add_symbol_to_partition, at lto/lto-partition.c:284
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56963 Bug #: 56963 Summary: GCC 4.8.0 LTO issue: lto1: internal compiler error: in add_symbol_to_partition, at lto/lto-partition.c:284 Classification: Unclassified Product: gcc Version: lto Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: vhais...@gmail.com I have tried to compile log4cplus (C++ logging library) on Cygwin64 with -flto GCC option. I am getting the following failure: lto1: internal compiler error: in add_symbol_to_partition, at lto/lto-partition.c:284 Here is a link to archive with the minimal amount of .o files and a test.sh script that reproduce the problem for me. https://docs.google.com/file/d/0B-WkLJEfYmSEUVVOdm56X1FSNDA/edit?usp=drive_web
[Bug c++/56963] GCC 4.8.0 LTO issue: lto1: internal compiler error: in add_symbol_to_partition, at lto/lto-partition.c:284
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56963 Václav Zeman vhaisman at gmail dot com changed: What|Removed |Added Keywords||lto Target||x86_64-pc-cygwin CC||vhaisman at gmail dot com Host||x86_64-pc-cygwin Known to fail||4.8.0 Build||x86_64-pc-cygwin --- Comment #1 from Václav Zeman vhaisman at gmail dot com 2013-04-15 08:37:39 UTC --- Link to the original conversation in cygwin-apps@ ml: http://cygwin.com/ml/cygwin-apps/2013-04/msg00154.html $ uname -a CYGWIN_NT-6.1 HAIVA01W7 1.7.18(0.263/5/3) 2013-04-10 14:35 x86_64 Cygwin $ g++ -v Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-cygwin/4.8.0/lto-wrapper.exe Target: x86_64-pc-cygwin Configured with: /usr/src/ports/gcc/gcc-4.8.0-1/src/gcc-4.8.0/configure --srcdir=/usr/src/ports/gcc/gcc-4.8.0-1/src/gcc-4.8.0 --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --libexecdir=/usr/lib --datadir=/usr/share --localstatedir=/var --sysconfdir=/etc --datarootdir=/usr/share --docdir=/usr/share/doc/gcc -C --build=x86_64-pc-cygwin --host=x86_64-pc-cygwin --target=x86_64-pc-cygwin --without-libiconv-prefix --without-libintl-prefix --enable-shared --enable-shared-libgcc --enable-static --enable-version-specific-runtime-libs --enable-bootstrap --disable-__cxa_atexit --with-dwarf2 --with-tune=generic --enable-languages=c,c++,fortran,lto,objc,obj-c++ --enable-graphite --enable-threads=posix --enable-libatomic --enable-libgomp --disable-libitm --enable-libquadmath --enable-libquadmath-support --enable-libssp --enable-libgcj-sublibs --disable-java-awt --disable-symvers --with-ecj-jar=/usr/share/java/ecj.jar --with-gnu-ld --with-gnu-as --with-cloog-include=/usr/include/cloog-isl --without-libiconv-prefix --without-libintl-prefix --with-system-zlib Thread model: posix gcc version 4.8.0 (GCC)
[Bug c++/56963] GCC 4.8.0 LTO issue: lto1: internal compiler error: in add_symbol_to_partition, at lto/lto-partition.c:284
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56963 --- Comment #2 from Václav Zeman vhaisman at gmail dot com 2013-04-15 08:39:40 UTC --- None of the tricks (-fno-reorder-blocks, -r, -nostdlib) help here. It still fails the same way.
[Bug lto/56088] [4.8/4.9 Regression] LTO error: error: inlining failed in call to always_inline ‘vswprintf’: recursive inlining
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56088 Václav Zeman vhaisman at gmail dot com changed: What|Removed |Added Status|WAITING |RESOLVED Resolution||WORKSFORME --- Comment #10 from Václav Zeman vhaisman at gmail dot com 2013-03-22 14:57:19 UTC --- I could not reproduce this with newer snapshots.
[Bug lto/56088] [4.8 Regression] LTO error: error: inlining failed in call to always_inline ‘vswprintf’: recursive inlining
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56088 --- Comment #8 from Václav Zeman vhaisman at gmail dot com 2013-01-28 20:12:49 UTC --- (In reply to comment #7) What linker are you using? It seems to work for me with GNU ld 2.23.1. Using ./xg++ -B. t2.ii -r -nostdlib -flto -std=c++11 -march=amdfam10 -mfxsr -fPIC -O3 -flto-partition=none -fuse-linker-plugin and preprocessed source. Did you use the same flags compiling timehelper.o? I am seeing this when I add -Wl,-v to command line: /usr/bin/ld.gold -plugin /home/wilx/gcc48/libexec/gcc/x86_64-linux-gnu/4.8.0/liblto_plugin.so -plugin-opt=/home/wilx/gcc48/libexec/gcc/x86_64-linux-gnu/4.8.0/lto-wrapper -plugin-opt=-fresolution=/tmp/cchgMTW0.res --sysroot=/ --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o out.so -r -L/home/wilx/gcc48/lib/gcc/x86_64-linux-gnu/4.8.0 -L/home/wilx/gcc48/lib/gcc/x86_64-linux-gnu/4.8.0/../../../../lib64 -L/lib/x86_64-linux-gnu -L/lib/../lib64 -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib64 -L/home/wilx/gcc48/lib/gcc/x86_64-linux-gnu/4.8.0/../../.. -v ./timehelper.o GNU gold (GNU Binutils for Ubuntu 2.22.90.20120924) 1.11 g++-4.8 @/tmp/cc2L4QqZ.args
[Bug c++/56088] New: LTO error: error: inlining failed in call to always_inline ‘vswprintf’: recursive inlining
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56088 Bug #: 56088 Summary: LTO error: error: inlining failed in call to always_inline ‘vswprintf’: recursive inlining Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: vhais...@gmail.com Created attachment 29258 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=29258 bug sources I am seeing the following compilation/linking error that I am not seeing with non-LTO builds: --8--8--8--8--8--8--8--8--8--8--8--8--8--8--8--8--8--8--8 In file included from :256:0: /usr/include/x86_64-linux-gnu/bits/wchar2.h: In function ‘_ZN9__gnu_cxx12__to_xstringISbIwSt11char_traitsIwESaIwEEwEET_PFiPT0_mPKS6_P13__va_list_tagEmS9_z.constprop.0’: /usr/include/x86_64-linux-gnu/bits/wchar2.h:316:28: error: inlining failed in call to always_inline ‘vswprintf’: recursive inlining __NTH (vswprintf (wchar_t *__restrict __s, size_t __n, ^ In file included from /home/wilx/gcc48/include/c++/4.8.0/bits/stl_algobase.h:3320:0, from :1177: /usr/include/x86_64-linux-gnu/bits/wchar2.h:322:50: error: called from here return __vswprintf_alias (__s, __n, __fmt, __ap); ^ lto-wrapper: g++-4.8 returned 1 exit status /usr/bin/ld.gold: fatal error: lto-wrapper failed collect2: error: ld returned 1 exit status --8--8--8--8--8--8--8--8--8--8--8--8--8--8--8--8--8--8--8 I am attaching the single .o file that reproduces the problem for me. Here is a command line that causes it for me: g++-4.8 -v -fPIC -DPIC -r -nostdlib ./timehelper.o -march=native -O3 -flto -flto-partition=none -fuse-linker-plugin -o out.so
[Bug c++/56088] LTO error: error: inlining failed in call to always_inline ‘vswprintf’: recursive inlining
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56088 --- Comment #1 from Václav Zeman vhaisman at gmail dot com 2013-01-23 20:45:10 UTC --- Created attachment 29259 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=29259 output log
[Bug c++/56088] LTO error: error: inlining failed in call to always_inline ‘vswprintf’: recursive inlining
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56088 --- Comment #2 from Václav Zeman vhaisman at gmail dot com 2013-01-23 20:47:01 UTC --- GCC information detail: amber2::wilx:~/log4cplus-bzr/work-trunk/objdir/lto-bug g++-4.8 -v Using built-in specs. COLLECT_GCC=g++-4.8 COLLECT_LTO_WRAPPER=/home/wilx/gcc48/libexec/gcc/x86_64-linux-gnu/4.8.0/lto-wrapper Target: x86_64-linux-gnu Configured with: ../trunk/configure -v --with-pkgversion='wilx/amber2 custom build' --enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/home/wilx/gcc48 --program-suffix=-4.8 --enable-shared --enable-linker-build-id --with-system-zlib --without-included-gettext --enable-threads=posix --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=rt --enable-gnu-unique-object --enable-lto --enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-gmp=/usr --with-mpc=/usr --with-mpfr=/usr --with-cloog=/usr GNAT=gnatgcc --enable-bootstrap LD=ld.gold Thread model: posix gcc version 4.8.0 20130123 (experimental) [trunk revision 195409] (wilx/amber2 custom build) This was built from svn://gcc.gnu.org/svn/gcc/trunk at revision 195409.
[Bug lto/56088] LTO error: error: inlining failed in call to always_inline ‘vswprintf’: recursive inlining
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56088 --- Comment #4 from Václav Zeman vhaisman at gmail dot com 2013-01-23 20:53:52 UTC --- Created attachment 29260 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=29260 preprocessed source of timehelper.cxx Here is the preprocessed source.
[Bug lto/56088] LTO error: error: inlining failed in call to always_inline ‘vswprintf’: recursive inlining
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56088 --- Comment #5 from Václav Zeman vhaisman at gmail dot com 2013-01-23 22:20:16 UTC --- (In reply to comment #3) Can you provide the preprocessed source that was used to generate timehelper.o? Done.
[Bug rtl-optimization/55952] New: x86 FPU, unnecessary fxch instruction
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55952
Bug #: 55952
Summary: x86 FPU, unnecessary fxch instruction
Classification: Unclassified
Product: gcc
Version: 4.7.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: vhais...@gmail.com
I am wondering if there are not some improvements that could be made in
generation of x86 FPU code. Here is a simple sign function:
float signf4(float x)
{
return x 0.0f
? -1.0f
: 1.0f;
}
It generates the following assembler code (GCC 4.7.2, g++ -m32 -O3
-fverbose-asm -save-temps -g3 -ggdb -march=native):
_Z6signf4f:
.LFB84:
.loc 1 27 0
.cfi_startproc
.LVL4:
.loc 1 30 0
fld1
fldz
flds4(%esp)# x
fxch%st(1)# ??? Why?
fucomip%st(1), %st#,
ffreep%st(0)#
fld1
fchs
fcmovbe%st(1), %st#,,
fstp%st(1)#
.loc 1 31 0
ret
I am wondering why is the fxch instruction necessary and why is the code
not instead like this?
_Z6signf4f:
.LFB84:
.loc 1 27 0
.cfi_startproc
.LVL4:
.loc 1 30 0
fld1
flds4(%esp)# ??? Load the parameter before the zero.
fldz# ??? to avoid the fxch instruction.
fucomip%st(1), %st#,
[...]
[Bug lto/55902] lto1 SIGSEGV
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55902 --- Comment #4 from Václav Zeman vhaisman at gmail dot com 2013-01-08 15:00:09 UTC --- I have fixed the Google doc sharing. It should be accessible now. I am not sure if I can check GCC 4.7.2, I am using what Ubuntu provides as package. I believe that MinGW cross compiler suite does not use the gold linker. As for the source reduction and flags, I will try those.
[Bug lto/55902] lto1 SIGSEGV
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55902 --- Comment #5 from Václav Zeman vhaisman at gmail dot com 2013-01-08 18:26:47 UTC --- (In reply to comment #3) Does it only reproduce with -flto-partition=none? Yes. Changing either the LTO partitioning algorithm or adding -r or -nostdlib makes the error go away.
[Bug lto/55902] New: lto1 SIGSEGV
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55902 Bug #: 55902 Summary: lto1 SIGSEGV Classification: Unclassified Product: gcc Version: 4.6.3 Status: UNCONFIRMED Severity: normal Priority: P3 Component: lto AssignedTo: unassig...@gcc.gnu.org ReportedBy: vhais...@gmail.com During compilation of log4cplus using Linux-x-Ming-w64 cross compiler, I am seeing a SIGSEGV in lto1 executable. The command line to reproduce is the following: /usr/lib/gcc/i686-w64-mingw32/4.6/lto1 -march=amdfam10 -mcx16 -msahf -mno-movbe -mno-aes -mno-pclmul -mpopcnt -mabm -mno-lwp -mno-fma -mno-fma4 -mno-xop -mno-bmi -mno-tbm -mno-avx -mno-sse4.2 -mno-sse4.1 -mno-rdrnd -mno-f16c -mno-fsgsbase --param l1-cache-size=64 --param l1-cache-line-size=64 --param l2-cache-size=512 -mtune=amdfam10 -quiet -dumpdir ./ -dumpbase appender_test.exe -auxbase-strip /tmp/ccyNkt1q.lto.o -g -g3 -ggdb -O2 -Wall -Wextra -pedantic -Wstrict-aliasing -Wstrict-overflow -Woverloaded-virtual -Wc++0x-compat -Wundef -Wshadow -Wformat -Wsuggest-attribute=noreturn -Wno-variadic-macros -version -fverbose-asm -fvisibility=hidden -flto-partition=none -fuse-linker-plugin -fresolution=appender_test.res @./ccxMMj8q -o /tmp/ccyNkt1q.lto.s Use the attached tarball to get the necessary files.
[Bug lto/55902] lto1 SIGSEGV
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55902 --- Comment #1 from Václav Zeman vhaisman at gmail dot com 2013-01-07 19:53:51 UTC --- Attachment upload did not work. The following link should work: https://docs.google.com/open?id=0B-WkLJEfYmSEVHVmUzR3NDAxTFE
[Bug lto/55902] lto1 SIGSEGV
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55902 --- Comment #2 from Václav Zeman vhaisman at gmail dot com 2013-01-07 20:19:11 UTC --- HTH: amber2::wilx:~/log4cplus-bzr/work-trunk/objdir-mingw64-w32/bug gdb /usr/lib/gcc/i686-w64-mingw32/4.6/lto1 GNU gdb (GDB) 7.5-ubuntu Copyright (C) 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type show copying and show warranty for details. This GDB was configured as x86_64-linux-gnu. For bug reporting instructions, please see: http://www.gnu.org/software/gdb/bugs/... Reading symbols from /usr/lib/gcc/i686-w64-mingw32/4.6/lto1...(no debugging symbols found)...done. (gdb) r -march=amdfam10 -mcx16 -msahf -mno-movbe -mno-aes -mno-pclmul -mpopcnt -mabm -mno-lwp -mno-fma -mno-fma4 -mno-xop -mno-bmi -mno-tbm -mno-avx -mno-sse4.2 -mno-sse4.1 -mno-rdrnd -mno-f16c -mno-fsgsbase --param l1-cache-size=64 --param l1-cache-line-size=64 --param l2-cache-size=512 -mtune=amdfam10 -quiet -dumpdir ./ -dumpbase appender_test.exe -auxbase-strip /tmp/ccyNkt1q.lto.o -g -g3 -ggdb -O2 -Wall -Wextra -pedantic -Wstrict-aliasing -Wstrict-overflow -Woverloaded-virtual -Wc++0x-compat -Wundef -Wshadow -Wformat -Wsuggest-attribute=noreturn -Wno-variadic-macros -version -fverbose-asm -fvisibility=hidden -flto-partition=none -fuse-linker-plugin -fresolution=appender_test.res @./ccxMMj8q -o /tmp/ccyNkt1q.lto.s Starting program: /usr/lib/gcc/i686-w64-mingw32/4.6/lto1 -march=amdfam10 -mcx16 -msahf -mno-movbe -mno-aes -mno-pclmul -mpopcnt -mabm -mno-lwp -mno-fma -mno-fma4 -mno-xop -mno-bmi -mno-tbm -mno-avx -mno-sse4.2 -mno-sse4.1 -mno-rdrnd -mno-f16c -mno-fsgsbase --param l1-cache-size=64 --param l1-cache-line-size=64 --param l2-cache-size=512 -mtune=amdfam10 -quiet -dumpdir ./ -dumpbase appender_test.exe -auxbase-strip /tmp/ccyNkt1q.lto.o -g -g3 -ggdb -O2 -Wall -Wextra -pedantic -Wstrict-aliasing -Wstrict-overflow -Woverloaded-virtual -Wc++0x-compat -Wundef -Wshadow -Wformat -Wsuggest-attribute=noreturn -Wno-variadic-macros -version -fverbose-asm -fvisibility=hidden -flto-partition=none -fuse-linker-plugin -fresolution=appender_test.res @./ccxMMj8q -o /tmp/ccyNkt1q.lto.s GNU GIMPLE (GCC) version 4.6.3 (i686-w64-mingw32) compiled by GNU C version 4.6.3 20120624 (prerelease), GMP version 5.0.2, MPFR version 3.1.0-p3, MPC version 0.9 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 GNU GIMPLE (GCC) version 4.6.3 (i686-w64-mingw32) compiled by GNU C version 4.6.3 20120624 (prerelease), GMP version 5.0.2, MPFR version 3.1.0-p3, MPC version 0.9 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Program received signal SIGSEGV, Segmentation fault. 0x004a68b0 in bitmap_bit_p () (gdb) bt #0 0x004a68b0 in bitmap_bit_p () #1 0x0084a6b3 in ?? () #2 0x0084587c in ?? () #3 0x008459f0 in ?? () #4 0x00632e8b in execute_one_pass () #5 0x00633145 in execute_pass_list () #6 0x0083ca80 in cgraph_process_new_functions () #7 0x006330f5 in execute_one_pass () #8 0x0063353a in execute_ipa_pass_list () #9 0x0083e4b1 in cgraph_optimize () #10 0x0049d279 in lto_main () #11 0x006c6de9 in toplev_main () #12 0x76f4176d in __libc_start_main (main=0x485ea0 main, argc=60, ubp_av=0x7fffe088, init=optimized out, fini=optimized out, rtld_fini=optimized out, stack_end=0x7fffe078) at libc-start.c:226 #13 0x00485f09 in _start ()
[Bug c/53612] New: __attribute__((format(...))) does not work with wchar_t format strings
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53612 Bug #: 53612 Summary: __attribute__((format(...))) does not work with wchar_t format strings Classification: Unclassified Product: gcc Version: 4.5.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassig...@gcc.gnu.org ReportedBy: vhais...@gmail.com The __attribute__((format(...))) does not work for wchar_t format strings: /*-8--*/ #include wchar.h void foo (char const * fmt, ...) __attribute__ ((format (__printf__, 1, 2))); void wide_foo (wchar_t const * fmt, ...) __attribute__ ((format (__printf__, 1, 2))); /*-8--*/ I get the following error with Cygwin's GCC 4.5.3: ./format_attr_text.c:4:1: error: format string argument not a string type
[Bug c++/40942] GCC accepts code that Comeau and MSVC deems invalid.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40942 Václav Zeman vhaisman at gmail dot com changed: What|Removed |Added Version|4.4.1 |4.7.0 --- Comment #6 from Václav Zeman vhaisman at gmail dot com 2012-03-29 17:39:40 UTC --- This still fails for gcc version 4.7.0 20120225.
[Bug tree-optimization/50272] A case that PRE optimization hurts performance
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50272 --- Comment #4 from Václav Zeman vhaisman at gmail dot com 2012-03-29 17:51:51 UTC --- This is still a problem in version 4.7.0 20120225.
