New warning "different GCC executable" was just 'xgcc' instead of 'g++'.


Next error in 'extc++.h.gch/O2g.gch' is fixed by:

/usr/share/src/gcc_build/./gcc/xgcc -shared-libgcc -B/usr/share/src/gcc_build/./gcc -nostdinc++ -L/usr/share/src/gcc_build/i386-pc-solaris2.11/libstdc++-v3/src -L/usr/share/src/gcc_build/i386-pc-solaris2.11/libstdc++-v3/src/.libs -B/usr/local/i386-pc-solaris2.11/bin/ -B/usr/local/i386-pc-solaris2.11/lib/ -isystem /usr/local/i386-pc-solaris2.11/include -isystem /usr/local/i386-pc-solaris2.11/sys-include -Winvalid-pch -x c++-header -g -O2   -I/usr/share/src/gcc_build/i386-pc-solaris2.11/libstdc++-v3/include/i386-pc-solaris2.11 -I/usr/share/src/gcc_build/i386-pc-solaris2.11/libstdc++-v3/include -I/usr/share/src/gcc_trunk/libstdc++-v3/libsupc++ -O2 -g /usr/share/src/gcc_trunk/libstdc++-v3/include/precompiled/extc++.h -o i386-pc-solaris2.11/bits/extc++.h.gch/O2g.gch

Rob

That worked.

The build continues until it fails here:

# gmake
(5 minutes)
...
Making all in src
gmake[4]: Entering directory `/usr/share/src/gcc_build/i386-pc-solaris2.11/libstdc++-v3/src'
...
 -DPIC -o .libs/parallel_settings.o
/bin/sh ../libtool --tag CXX --mode=link g++ -Wl,-O1 -Wl,-z,relro  -fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual  -fdiagnostics-show-location=once  -ffunction-sections -fdata-sections   -o libstdc++.la -rpath /usr/local/gcc4/lib -version-info 6:11:0  -lm  atomic.lo bitmap_allocator.lo pool_allocator.lo mt_allocator.lo codecvt.lo compatibility.lo complex_io.lo ctype.lo debug.lo functexcept.lo hash.lo hash_c++0x.lo globals_io.lo hashtable.lo hashtable_c++0x.lo ios.lo ios_failure.lo ios_init.lo ios_locale.lo limits.lo limits_c++0x.lo list.lo debug_list.lo locale.lo locale_init.lo locale_facets.lo localename.lo math_stubs_float.lo math_stubs_long_double.lo stdexcept.lo strstream.lo system_error.lo tree.lo allocator-inst.lo concept-inst.lo fstream-inst.lo ext-inst.lo ios-inst.lo iostream-inst.lo istream-inst.lo istream.lo locale-inst.lo misc-inst.lo ostream-inst.lo sstream-inst.lo streambuf-inst.lo streambuf.lo string-inst.lo valarray-inst.lo wlocale-inst.lo wstring-inst.lo mutex.lo condition_variable.lo chrono.lo thread.lo atomicity.lo codecvt_members.lo collate_members.lo ctype_members.lo messages_members.lo monetary_members.lo numeric_members.lo time_members.lo basic_file.lo c++locale.lo  parallel_list.lo parallel_settings.lo  ../libsupc++/libsupc++convenience.la 
libtool: link: g++ -shared -nostdlib /usr/lib/crti.o /usr/lib/values-Xa.o /usr/local/lib/gcc/i386-pc-solaris2.11/4.4.0/crtbegin.o  .libs/atomic.o .libs/bitmap_allocator.o .libs/pool_allocator.o .libs/mt_allocator.o .libs/codecvt.o .libs/compatibility.o .libs/complex_io.o .libs/ctype.o .libs/debug.o .libs/functexcept.o .libs/hash.o .libs/hash_c++0x.o .libs/globals_io.o .libs/hashtable.o .libs/hashtable_c++0x.o .libs/ios.o .libs/ios_failure.o .libs/ios_init.o .libs/ios_locale.o .libs/limits.o .libs/limits_c++0x.o .libs/list.o .libs/debug_list.o .libs/locale.o .libs/locale_init.o .libs/locale_facets.o .libs/localename.o .libs/math_stubs_float.o .libs/math_stubs_long_double.o .libs/stdexcept.o .libs/strstream.o .libs/system_error.o .libs/tree.o .libs/allocator-inst.o .libs/concept-inst.o .libs/fstream-inst.o .libs/ext-inst.o .libs/ios-inst.o .libs/iostream-inst.o .libs/istream-inst.o .libs/istream.o .libs/locale-inst.o .libs/misc-inst.o .libs/ostream-inst.o .libs/sstream-inst.o .libs/streambuf-inst.o .libs/streambuf.o .libs/string-inst.o .libs/valarray-inst.o .libs/wlocale-inst.o .libs/wstring-inst.o .libs/mutex.o .libs/condition_variable.o .libs/chrono.o .libs/thread.o .libs/atomicity.o .libs/codecvt_members.o .libs/collate_members.o .libs/ctype_members.o .libs/messages_members.o .libs/monetary_members.o .libs/numeric_members.o .libs/time_members.o .libs/basic_file.o .libs/c++locale.o .libs/parallel_list.o .libs/parallel_settings.o  -Wl,--whole-archive ../libsupc++/.libs/libsupc++convenience.a -Wl,--no-whole-archive  -Wl,-rpath -Wl,/usr/local/lib -Wl,-rpath -Wl,/usr/local/lib -L/usr/local/lib/gcc/i386-pc-solaris2.11/4.4.0 -L/usr/local/lib/gcc/i386-pc-solaris2.11/4.4.0/../../../../i386-pc-solaris2.11/lib -L/usr/local/lib/gcc/i386-pc-solaris2.11/4.4.0/../../.. /usr/local/lib/libstdc++.so -lm -lgcc_s /usr/local/lib/gcc/i386-pc-solaris2.11/4.4.0/crtend.o /usr/lib/crtn.o  -Wl,-O1 -Wl,-z -Wl,relro   -Wl,-soname -Wl,libstdc++.so.6 -o .libs/libstdc++.so.6.0.11
ld: fatal: option -z has illegal argument `relro'
usage: ld [-6:abc:d:e:f:h:il:mo:p:rstu:z:B:CD:F:GI:L:M:N:P:Q:R:S:VW:Y:?] file(s)
	[-64]		enforce a 64-bit link-edit
	[-a]		create an absolute file
	[-b]		do not do special PIC relocations in a.out
	[-B direct | nodirect]
			establish direct bindings, or inhibit direct binding
			to, the object being created
	[-B dynamic | static]
			search for shared libraries|archives
	[-B eliminate]	eliminate unqualified global symbols from the
			symbol table
	[-B group]	relocate object from within group
	[-B local]	reduce unqualified global symbols to local
	[-B reduce]	process symbol reductions
	[-B symbolic]	bind external references to definitions when creating
			shared objects
	[-c name]	record configuration file `name'
	[-C]		demangle C++ symbol name diagnostics
	[-d y | n]	operate in dynamic|static mode
	[-D token,...]	print diagnostic messages
	[-e epsym], [--entry epsym]
			use `epsym' as entry point address
	[-f name], [--auxiliary name]
			specify library for which this file is an auxiliary
			filter
	[-F name], [--filter name]
			specify library for which this file is a filter
	[-G], [-shared]
			create a shared object
	[-h name], [--soname name]
			use `name' as internal shared object identifier
	[-i]		ignore LD_LIBRARY_PATH setting
	[-I name]	use `name' as path of interpreter
	[-l x], [--library x]
			search for libx.so or libx.a
	[-L path], [--library-path path]
			search for libraries in directory `path'
	[-m]		print memory map
	[-M mapfile]	use processing directives contained in `mapfile'
	[-N string]	create a dynamic dependency for `string'
	[-o outfile], [--output outfile]
			name the output file `outfile'
	[-p auditlib]	identify audit library to accompany this object
	[-P auditlib]	identify audit library for processing the dependencies
			of this object
	[-Q y | n]	do|do not place version information in output file
	[-r], [--relocatable]
			create a relocatable object
	[-R path], [-rpath path]
			specify a library search path to be used at run time
	[-s], [--strip-all]
			strip any symbol and debugging information
	[-S supportlib]
			specify a link-edit support library
	[-t]		do not warn of multiply-defined symbols that have
			different sizes or alignments
	[-u symname], [--undefined symname]
			create an undefined symbol `symname'
	[-V], [--version]
			print version information
	[-Y P,dirlist]	use `dirlist' as a default path when searching for
			libraries
	[-z absexec]	when building an executable absolute symbols
 			referenced in dynamic objects are promoted to
 			the executable
	[-z allextract | defaultextract | weakextract],
	[--whole-archive | --no-whole-archive]
			extract all member files, only members that resolve
			undefined or tentative symbols, or allow extraction of
			archive members to resolve weak references from 
			archive files
	[-z altexec64]	execute the 64-bit link-editor
	[-z combreloc | nocombreloc]
			combine|do not combine multiple relocation sections
	[-z defs], [--no-undefined]
			disallow undefined symbol references
	[-z direct | nodirect]
			enable|disable direct binding to shared object
			dependencies
	[-z endfiltee]	marks a filtee such that it will terminate a filters
			search
	[-z finiarray=function]
			name of function to be appended to the .finiarray
	[-z groupperm | nogroupperm]
			enable|disable setting of group permissions
			on dynamic dependencies
	[-z help], [--help]
			print this usage message
	[-z ignore | record]
			ignore|record unused dynamic dependencies
	[-z initarray=function]
			name of function to be appended to the .initarray
	[-z initfirst]	mark object to indicate that its .init section should
			be executed before the .init section of any other
			objects
	[-z interpose]	dynamic object is to be an `interposer' on direct
			bindings
	[-z lazyload | nolazyload]
			enable|disable delayed loading of shared object
			dependencies
	[-z ld32=arg1,arg2,...]
			define arguments applicable to the 32-bit class of ld(1)
	[-z ld64=arg1,arg2,...]
			define arguments applicable to the 64-bit class of ld(1)
	[-z loadfltr]	mark filter as requiring immediate loading of its
			filtees at runtime
	[-z muldefs], [--allow-multiple-definition]
			allow multiply-defined symbols
	[-z nocompstrtab]
			disable compression of string tables
	[-z nodefs]	allow undefined symbol references
	[-z nodefaultlib]
			mark object to ignore any default library search path
	[-z nodelete]	mark object as non-deletable
	[-z nodlopen]	mark object as non-dlopen()'able
	[-z nodump]	mark object as non-dldump()'able
	[-z noldynsym]	do not add a .SUNW_ldynsym section
	[-z now]	mark object as requiring non-lazy binding
	[-z nopartial]	expand any partially initialized symbols
	[-z noversion]	do not record any version sections
	[-z origin]	mark object as requiring $ORIGIN processing
	[-z preinitarray=function]
			name of function to be appended to the .preinitarray
	[-z redlocsym]	reduce local syms in .symtab to a minimum
	[-z relaxreloc]	relax rules used for relocations against COMDAT sections
	[-z rescan]	after processing all arguments, rescan archive list
			until no further member extraction occurs
	[-z rescan-now]	immediately rescan archive list until
			no further member extraction occurs
	[-z rescan-start archives... -z rescan-end],
	[--start-group archives... --end-group], [-( archives... -)]
			rescan specified archive group upon reaching
			the end of the group, until no further
			member extraction occurs
	[-z target=platform]
			target machine for cross linking
	[-z text]	disallow output relocations against text
	[-z textoff]	allow output relocations against text
	[-z textwarn]	warn if there are relocations against text
	[-z verbose]	generate warnings for suspicious processings
collect2: ld returned 1 exit status
gmake[4]: *** [libstdc++.la] Error 1
gmake[4]: Leaving directory `/usr/share/src/gcc_build/i386-pc-solaris2.11/libstdc++-v3/src'
gmake[3]: *** [all-recursive] Error 1
gmake[3]: Leaving directory `/usr/share/src/gcc_build/i386-pc-solaris2.11/libstdc++-v3'
gmake[2]: *** [all] Error 2
gmake[2]: Leaving directory `/usr/share/src/gcc_build/i386-pc-solaris2.11/libstdc++-v3'
gmake[1]: *** [all-target-libstdc++-v3] Error 2
gmake[1]: Leaving directory `/usr/share/src/gcc_build'
gmake: *** [all] Error 2



The commands for ld are wrong. Let's try without "-Wl,-O1 -Wl,-z -Wl,relro":

...
 /usr/lib/crtn.o   -Wl,-soname -Wl,libstdc++.so.6 -o .libs/libstdc++.so.6.0.11
ld: fatal: symbol `__i686.get_pc_thunk.bx' is multiply-defined:
	(file /usr/local/lib/gcc/i386-pc-solaris2.11/4.4.0/crtbegin.o type=FUNC; file ../libsupc++/.libs/libsupc++convenience.a(cp-demangle.o) type=FUNC);
ld: fatal: recording name conflict: file `/usr/local/lib/libstdc++.so' and soname option (-h, --soname) provide identical dependency names: libstdc++.so.6
ld: fatal: file processing errors. No output written to .libs/libstdc++.so.6.0.11
collect2: ld returned 1 exit status


Rob

Even though I ./configured using "--with-gnu-ld --with-ld=/usr/local/bin/ld"
the scripts seemed to have decided to use the "gcc-used-for-build"'s choice
of 'ld' instead of the main ./configure scripts settings ...


# gcc -v
Using built-in specs.
Target: i386-pc-solaris2.11
Configured with: ../gcc_trunk/configure --build=i386-pc-solaris2.11 --enable-languages=ada,c,c++,fortran,java,objc,obj-c++ --enable-shared --disable-static --enable-multilib --enable-decimal-float --with-long-double-128 --with-included-gettext --enable-stage1-checking --enable-checking=release --with-tune=k8 --with-cpu=k8 --with-arch=k8 --with-gnu-as --with-as=/usr/local/bin/as --without-gnu-ld --with-ld=/usr/bin/ld --with-gmp=/usr/local --with-mpfr=/usr/local --without-ppl
Thread model: posix
gcc version 4.4.0 20090218 (experimental) [trunk revision 144266] (GCC) 

Rob

(In reply to comment #3)
> Even though I ./configured using "--with-gnu-ld --with-ld=/usr/local/bin/ld"
> the scripts seemed to have decided to use the "gcc-used-for-build"'s choice
> of 'ld' instead of the main ./configure scripts settings ...
> 
The second Bug in this Report (about the Linker) is filed here:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39111

Comment #0 is the only remaining Bug in this thread.

Rob

Any chance you could narrow this down? The revision stated as problematic has nothing to do with libstdc++. The file implicated, cfenv, has not had a change in 3 months.

What was a revision that worked?

This seems fine, and is after your revision:
http://gcc.gnu.org/ml/gcc-testresults/2009-02/msg02143.html

Was this a temporary blip? If so, please close. If not, please provide some more detail.

(In reply to comment #5)
> Any chance you could narrow this down? The revision stated as problematic has
> nothing to do with libstdc++. The file implicated, cfenv, has not had a change
> in 3 months.
> 
> Was this a temporary blip? If so, please close. If not, please provide some
> more detail.

I am fairly convinced that this blip was a manifestation of the
"Build Machinery's" confusion resulting from Linker issues that
are best handled in the URL given in Comment #4 . I will close
this since fixing the other Bug seems to make this unreproducible.

Rob

we've hit this with gcc-4.3.3 with arm-softfloat-linux-gnueabi targets, and the commit in question was for PR38000:
http://gcc.gnu.org/viewcvs?view=rev&revision=143194

/usr/arm-softfloat-linux-gnueabi/tmp/portage/sys-devel/gcc-4.3.3/work/gcc-4.3.3/libstdc++-v3/include/precompiled/stdtr1c++.h:38:
/usr/arm-softfloat-linux-gnueabi/tmp/portage/sys-devel/gcc-4.3.3/work/build/arm-softfloat-linux-gnueabi/libstdc++-v3/include/tr1_impl/cfenv:56:
error: '::fenv_t' has not been declared
/usr/arm-softfloat-linux-gnueabi/tmp/portage/sys-devel/gcc-4.3.3/work/build/arm-softfloat-linux-gnueabi/libstdc++-v3/include/tr1_impl/cfenv:57:
error: '::fexcept_t' has not been declared
/usr/arm-softfloat-linux-gnueabi/tmp/portage/sys-devel/gcc-4.3.3/work/build/arm-softfloat-linux-gnueabi/libstdc++-v3/include/tr1_impl/cfenv:60:
error: '::feclearexcept' has not been declared
/usr/arm-softfloat-linux-gnueabi/tmp/portage/sys-devel/gcc-4.3.3/work/build/arm-softfloat-linux-gnueabi/libstdc++-v3/include/tr1_impl/cfenv:61:
error: '::fegetexceptflag' has not been declared
/usr/arm-softfloat-linux-gnueabi/tmp/portage/sys-devel/gcc-4.3.3/work/build/arm-softfloat-linux-gnueabi/libstdc++-v3/include/tr1_impl/cfenv:62:
error: '::feraiseexcept' has not been declared
/usr/arm-softfloat-linux-gnueabi/tmp/portage/sys-devel/gcc-4.3.3/work/build/arm-softfloat-linux-gnueabi/libstdc++-v3/include/tr1_impl/cfenv:63:
error: '::fesetexceptflag' has not been declared

adding "-nostdinc++" to libstdc++-v3/include/Makefile.am seemed to fix it ...

in gcc-4.4.0 release this bug wasn't fixed

Created attachment 18438 [details]
proposed patch for the problem resolution on gcc-4_4-branch

I have encountered the same problem with reverse cross compilation of gcc-4.3 branch on Linux for powerpc target. The problem was introduced in #38000 (revision 143194), and safe solution is just to revert the changes on the next files:
* libstdc++-v3/include/c_global/cfenv
* libstdc++-v3/include/tr1/cfenv
* libstdc++-v3/include/tr1_impl/cfenv
* libstdc++-v3/include/c_compatibility/fenv.h

Proposed patch for gcc-4_4-branch (revision 151142) is attached.

(In reply to comment #10)
> I have encountered the same problem with reverse cross compilation of gcc-4.3
> branch on Linux for powerpc target. The problem was introduced in #38000
> (revision 143194), and safe solution is just to revert the changes on the next
> files:

The change is not safe at all, unless you can convincingly explain why reverting these bits does not break again 38000. 

If we want to seriously approach the problem that apparently some users are seeing together with cross compilers, we should first figure out what exactly is going on: is _GLIBCXX_HAVE_FENV_H undefined for some reason? Note that in general, as explained by Jakub in 38000, isn't correct to use #include_next in a cXXX header including an XXX.h header. I'm adding Jakub in CC for this one too...

(In reply to comment #7)
> we've hit this with gcc-4.3.3 with arm-softfloat-linux-gnueabi targets, and the
> commit in question was for PR38000:
> http://gcc.gnu.org/viewcvs?view=rev&revision=143194
> 
[snip]

Is this going to be fixed or?

See PR 40974 for the fenv_t issue.