host-x86_64-pc-linux-gnu/gcc/xgcc: No such file or directory

host-x86_64-pc-linux-gnu/gcc/xgcc: No such file or directory

[Jonny Grant]

Hello

Has anyone encountered this when compiling gcc from source? libgomp doesn't build due to xgcc missing

I got latest git, did
./configure --disable-multilib
make html

It gets stuck here:

checking whether make supports nested variables... yes
/home/jonny/code/repos/gcc_tests/gcc_doc/libgomp/configure: line 3520: /home/jonny/code/repos/gcc_tests/gcc_doc/host-x86_64-pc-linux-gnu/gcc/xgcc: No such file or directory
checking for x86_64-pc-linux-gnu-gcc... /home/jonny/code/repos/gcc_tests/gcc_doc/host-x86_64-pc-linux-gnu/gcc/xgcc -B/home/jonny/code/repos/gcc_tests/gcc_doc/host-x86_64-pc-linux-gnu/gcc/ -B/usr/local/x86_64-pc-linux-gnu/bin/ -B/usr/local/x86_64-pc-linux-gnu/lib/ -isystem /usr/local/x86_64-pc-linux-gnu/include -isystem /usr/local/x86_64-pc-linux-gnu/sys-include   
checking whether the C compiler works... no
configure: error: in `/home/jonny/code/repos/gcc_tests/gcc_doc/x86_64-pc-linux-gnu/libgomp':
configure: error: C compiler cannot create executables
See `config.log' for more details
make[1]: *** [Makefile:23679: configure-target-libgomp] Error 1
make[1]: Leaving directory '/home/jonny/code/repos/gcc_tests/gcc_doc'
make: *** [Makefile:1456: do-html] Error 2


I tried with:
./configure --disable-multilib --disable-libgomp

but it just stops at the next 

checking for x86_64-pc-linux-gnu-gcc... /home/jonny/code/repos/gcc_tests/gcc_doc/host-x86_64-pc-linux-gnu/gcc/xgcc -B/home/jonny/code/repos/gcc_tests/gcc_doc/host-x86_64-pc-linux-gnu/gcc/ -B/usr/local/x86_64-pc-linux-gnu/bin/ -B/usr/local/x86_64-pc-linux-gnu/lib/ -isystem /usr/local/x86_64-pc-linux-gnu/include -isystem /usr/local/x86_64-pc-linux-gnu/sys-include   
checking for suffix of object files... configure: error: in `/home/jonny/code/repos/gcc_tests/gcc_doc/x86_64-pc-linux-gnu/libstdc++-v3':
configure: error: cannot compute suffix of object files: cannot compile
ee `config.log' for more details
make[1]: *** [Makefile:17042: configure-target-libstdc++-v3] Error 1


Thanks, Jonny

Re: host-x86_64-pc-linux-gnu/gcc/xgcc: No such file or directory

[Jonathan Wakely]

On Wed, 29 Nov 2023 at 12:59, Jonny Grant <jg@jguk.org> wrote:
>
> Hello
>
> Has anyone encountered this when compiling gcc from source? libgomp doesn't build due to xgcc missing
>
> I got latest git, did
> ./configure --disable-multilib

Don't build in the source directory: https://gcc.gnu.org/wiki/FAQ#configure

> make html

Try make all-gcc before make html.

Re: host-x86_64-pc-linux-gnu/gcc/xgcc: No such file or directory

[Jonny Grant]

On 29/11/2023 13:05, Jonathan Wakely wrote:
> On Wed, 29 Nov 2023 at 12:59, Jonny Grant <jg@jguk.org> wrote:
>>
>> Hello
>>
>> Has anyone encountered this when compiling gcc from source? libgomp doesn't build due to xgcc missing
>>
>> I got latest git, did
>> ./configure --disable-multilib
> 
> Don't build in the source directory: https://gcc.gnu.org/wiki/FAQ#configure
> 
>> make html
> 
> Try make all-gcc before make html.


Sure. 

It gets stuck on genmodes.cc



../gcc_doc/configure --prefix=/home/jonny/code/repos/gcc_tests/gcc_install --disable-multilib

$ make all-gcc
<snip>
make[1]: Entering directory '/home/jonny/code/repos/gcc_tests/gcc_build/gcc'
g++ -std=c++11 -c   -g -O2   -DIN_GCC    -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Wconditionally-supported -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common  -DHAVE_CONFIG_H  -DGENERATOR_FILE -I. -Ibuild -I../../gcc_doc/gcc -I../../gcc_doc/gcc/build -I../../gcc_doc/gcc/../include  -I../../gcc_doc/gcc/../libcpp/include  \
	-o build/genmodes.o ../../gcc_doc/gcc/genmodes.cc
In file included from ../../gcc_doc/gcc/bconfig.h:3,
                 from ../../gcc_doc/gcc/genmodes.cc:20:
../../gcc_doc/gcc/auto-host.h:2717:16: error: declaration does not declare anything [-fpermissive]
 2717 | #define rlim_t long
      |                ^~~~
In file included from ../../gcc_doc/gcc/genmodes.cc:21:
../../gcc_doc/gcc/system.h:500:14: error: conflicting declaration of C function ‘void* sbrk(int)’
  500 | extern void *sbrk (int);
      |              ^~~~
In file included from ../../gcc_doc/gcc/system.h:302:
/usr/include/unistd.h:1076:14: note: previous declaration ‘void* sbrk(intptr_t)’
 1076 | extern void *sbrk (intptr_t __delta) __THROW;
      |              ^~~~
../../gcc_doc/gcc/system.h:508:14: error: ambiguating new declaration of ‘char* strstr(const char*, const char*)’
  508 | extern char *strstr (const char *, const char *);
      |              ^~~~~~
In file included from /usr/include/c++/13/cstring:42,
                 from ../../gcc_doc/gcc/system.h:241:
/usr/include/string.h:343:1: note: old declaration ‘const char* strstr(const char*, const char*)’
  343 | strstr (const char *__haystack, const char *__needle) __THROW
      | ^~~~~~
../../gcc_doc/gcc/system.h:556:20: error: conflicting declaration of C function ‘const char* strsignal(int)’
  556 | extern const char *strsignal (int);
      |                    ^~~~~~~~~
/usr/include/string.h:478:14: note: previous declaration ‘char* strsignal(int)’
  478 | extern char *strsignal (int __sig) __THROW;
      |              ^~~~~~~~~
In file included from ../../gcc_doc/gcc/system.h:729:
../../gcc_doc/gcc/../include/libiberty.h:112:14: error: ambiguating new declaration of ‘char* basename(const char*)’
  112 | extern char *basename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
      |              ^~~~~~~~
/usr/include/string.h:537:26: note: old declaration ‘const char* basename(const char*)’
  537 | extern "C++" const char *basename (const char *__filename)
      |                          ^~~~~~~~
make[1]: *** [Makefile:2987: build/genmodes.o] Error 1
make[1]: Leaving directory '/home/jonny/code/repos/gcc_tests/gcc_build/gcc'
make: *** [Makefile:4996: all-gcc] Error 2


Kind regards, Jonny

Re: host-x86_64-pc-linux-gnu/gcc/xgcc: No such file or directory

[Jonathan Wakely]

On Wed, 29 Nov 2023 at 14:44, Jonny Grant <jg@jguk.org> wrote:
>
>
>
> On 29/11/2023 13:05, Jonathan Wakely wrote:
> > On Wed, 29 Nov 2023 at 12:59, Jonny Grant <jg@jguk.org> wrote:
> >>
> >> Hello
> >>
> >> Has anyone encountered this when compiling gcc from source? libgomp doesn't build due to xgcc missing
> >>
> >> I got latest git, did
> >> ./configure --disable-multilib
> >
> > Don't build in the source directory: https://gcc.gnu.org/wiki/FAQ#configure
> >
> >> make html
> >
> > Try make all-gcc before make html.
>
>
> Sure.
>
> It gets stuck on genmodes.cc
>
>
>
> ../gcc_doc/configure --prefix=/home/jonny/code/repos/gcc_tests/gcc_install --disable-multilib

This belongs on the gcc-help list, not here.

Are you sure you ran configure in an empty dir, not one you'd already
fouled up with previous configurations or previous 'make html'
commands?
You should start in a completely empty directory. And I assume
../gcc_doc is not the same directory as .

The errors you're getting should not happen unless you've messed up
the configure step somehow.

>
> $ make all-gcc
> <snip>
> make[1]: Entering directory '/home/jonny/code/repos/gcc_tests/gcc_build/gcc'
> g++ -std=c++11 -c   -g -O2   -DIN_GCC    -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Wconditionally-supported -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common  -DHAVE_CONFIG_H  -DGENERATOR_FILE -I. -Ibuild -I../../gcc_doc/gcc -I../../gcc_doc/gcc/build -I../../gcc_doc/gcc/../include  -I../../gcc_doc/gcc/../libcpp/include  \
>         -o build/genmodes.o ../../gcc_doc/gcc/genmodes.cc
> In file included from ../../gcc_doc/gcc/bconfig.h:3,
>                  from ../../gcc_doc/gcc/genmodes.cc:20:
> ../../gcc_doc/gcc/auto-host.h:2717:16: error: declaration does not declare anything [-fpermissive]
>  2717 | #define rlim_t long
>       |                ^~~~
> In file included from ../../gcc_doc/gcc/genmodes.cc:21:
> ../../gcc_doc/gcc/system.h:500:14: error: conflicting declaration of C function ‘void* sbrk(int)’
>   500 | extern void *sbrk (int);
>       |              ^~~~
> In file included from ../../gcc_doc/gcc/system.h:302:
> /usr/include/unistd.h:1076:14: note: previous declaration ‘void* sbrk(intptr_t)’
>  1076 | extern void *sbrk (intptr_t __delta) __THROW;
>       |              ^~~~
> ../../gcc_doc/gcc/system.h:508:14: error: ambiguating new declaration of ‘char* strstr(const char*, const char*)’
>   508 | extern char *strstr (const char *, const char *);
>       |              ^~~~~~
> In file included from /usr/include/c++/13/cstring:42,
>                  from ../../gcc_doc/gcc/system.h:241:
> /usr/include/string.h:343:1: note: old declaration ‘const char* strstr(const char*, const char*)’
>   343 | strstr (const char *__haystack, const char *__needle) __THROW
>       | ^~~~~~
> ../../gcc_doc/gcc/system.h:556:20: error: conflicting declaration of C function ‘const char* strsignal(int)’
>   556 | extern const char *strsignal (int);
>       |                    ^~~~~~~~~
> /usr/include/string.h:478:14: note: previous declaration ‘char* strsignal(int)’
>   478 | extern char *strsignal (int __sig) __THROW;
>       |              ^~~~~~~~~
> In file included from ../../gcc_doc/gcc/system.h:729:
> ../../gcc_doc/gcc/../include/libiberty.h:112:14: error: ambiguating new declaration of ‘char* basename(const char*)’
>   112 | extern char *basename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
>       |              ^~~~~~~~
> /usr/include/string.h:537:26: note: old declaration ‘const char* basename(const char*)’
>   537 | extern "C++" const char *basename (const char *__filename)
>       |                          ^~~~~~~~
> make[1]: *** [Makefile:2987: build/genmodes.o] Error 1
> make[1]: Leaving directory '/home/jonny/code/repos/gcc_tests/gcc_build/gcc'
> make: *** [Makefile:4996: all-gcc] Error 2
>
>
> Kind regards, Jonny