Hi,
one of my build machines has Fedora 21 Rawhide with GCC 4.9.
I tried to build an FSL image and now binutils-native fails to compile:
| In file included from
/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas/as.h:95:0,
| from
/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas/subsegs.c:25:
|
/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas/subsegs.c:
In function 'subseg_change':
| ../bfd/bfd.h:304:75: error: right-hand operand of comma expression has no effect
[-Werror=unused-value]
| #define bfd_set_section_userdata(bfd, ptr, val) (((ptr)->userdata =
(val)),TRUE)
| ^
|
/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas/subsegs.c:70:7:
note: in expansion of macro 'bfd_set_section_userdata'
| bfd_set_section_userdata (stdoutput, seg, seginfo);
| ^
|
/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas/subsegs.c:
In function 'subseg_get':
| ../bfd/bfd.h:304:75: error: right-hand operand of comma expression has no effect
[-Werror=unused-value]
| #define bfd_set_section_userdata(bfd, ptr, val) (((ptr)->userdata =
(val)),TRUE)
| ^
|
/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas/subsegs.c:172:7:
note: in expansion of macro 'bfd_set_section_userdata'
| bfd_set_section_userdata (stdoutput, secptr, seginfo);
| ^
| gcc -DHAVE_CONFIG_H -I.
-I/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas
-I.
-I/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas
-I../bfd
-I/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas/config
-I/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas/../include
-I/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas/..
-I/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas/../bfd
-DLOCALEDIR="\"/home/zozo/fsl-community-bsp-2/build-master/tmp/sysroots/x86_64-linux/usr/share/locale\""
-isystem/home/zozo/fsl-community-bsp-2/build-master/tmp/sysroots/x86_64-linux/usr/include
-W -Wall -Wstrict-prototypes -Wmissing-prototypes -Wshadow -Werror
-isystem/home/zozo/fsl-community-bsp-2/build-master/tmp/sysroots/x86_64-linux/usr/include
-O2 -pipe -c -o tc-i386.o `test -f 'config/tc-i386.c' || echo
'/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas/'`config/tc-i386.c
| In file included from
/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas/as.h:95:0,
| from
/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas/write.c:25:
|
/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas/write.c:
In function 'record_alignment':
| ../bfd/bfd.h:303:83: error: right-hand operand of comma expression has no effect
[-Werror=unused-value]
| #define bfd_set_section_alignment(bfd, ptr, val) (((ptr)->alignment_power =
(val)),TRUE)
| ^
|
/home/zozo/fsl-community-bsp-2/build-master/tmp/work/x86_64-linux/binutils-native/2.24-r0/binutils-2.24/gas/write.c:366:5:
note: in expansion of macro 'bfd_set_section_alignment'
| bfd_set_section_alignment (stdoutput, seg, align);
| ^
| cc1: all warnings being treated as errors
This happens with the master branch of the fsl repositories.
I know Fedora 21 and GCC 4.9 still has some months to be released.
This is just a heads up that at least this new "-Wunused-value" was
enabled for -Wall in GCC 4.9. FYI, the bugzilla report about binutils is:
https://bugzilla.redhat.com/show_bug.cgi?id=1087374
Best regards,
Zoltán Böszörményi
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