mercurial, gcc-4.9 error

[rupert THURNER via buildfarm]

hi,

when building the new version of mercurial i get the error

creating build/temp.solaris-2.10-i86pc.32bit-2.7
creating build/temp.solaris-2.10-i86pc.32bit-2.7/mercurial
/opt/csw/bin/gcc-4.9 -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -O2
-pipe -m32 -march=pentiumpro -I/opt/csw/include -fPIC
-I/opt/csw/include/python2.7 -c mercurial/base85.c -o
build/temp.solaris-2.10-i86pc.32bit-2.7/mercurial/base85.o
unable to execute '/opt/csw/bin/gcc-4.9': No such file or directory
error: command '/opt/csw/bin/gcc-4.9' failed with exit status 1
/home/rupert/opencsw/.buildsys/v2/gar//gar.lib.mk:919: recipe for
target 'build-work/solaris10-i386/build-isa-pentium_pro-python_version-2_7/mercurial-3.6.2/setup.py'
failed
gmake[1]: *** [build-work/solaris10-i386/build-isa-pentium_pro-python_version-2_7/mercurial-3.6.2/setup.py]
Error 1
gmake[1]: Leaving directory '/home/rupert/opencsw/mercurial/trunk'
gar/gar.mk:198: recipe for target
'merge-isa-pentium_pro-python_version-2_7' failed
gmake: *** [merge-isa-pentium_pro-python_version-2_7] Error 2

i did not change anything in the makefile but the version, did a "mgar
up" on unstable10x.

what is different, resp where should i build now? i saw gcc-5.2 is
there, but the makefile does not contain any reference to any gcc.

best,
rupert