Cannot install bossa, there are many errors,how to solve? #193

I'm trying to install bossa,but there are many build errors:
/usr/include/bits/stdio2.h: In function 'void GTM::gtm_verror(const char*, va_list)':
/usr/include/bits/stdio2.h:124:1: error: inlining failed in call to always_inline 'int vfprintf(FILE*, const char*, __gnuc_va_list)': function body can be overwritten at link time
vfprintf (FILE *__restrict __stream,
^
../../../gcc-4.9.4/libitm/util.cc:35:31: error: called from here
vfprintf (stderr, fmt, list);
^
make[4]: *** [util.lo] Error 1
make[4]: Leaving directory /usr/local/pkgsrc/lang/gcc49/work/build/aarch64-redhat-linux/libitm' make[3]: *** [all-recursive] Error 1 make[3]: Leaving directory /usr/local/pkgsrc/lang/gcc49/work/build/aarch64-redhat-linux/libitm'
make[2]: *** [all] Error 2
make[2]: Leaving directory /usr/local/pkgsrc/lang/gcc49/work/build/aarch64-redhat-linux/libitm' make[1]: *** [all-target-libitm] Error 2 make[1]: Leaving directory /usr/local/pkgsrc/lang/gcc49/work/build'
make: *** [all] Error 2
*** Error code 2

Stop.
bmake[6]: stopped in /usr/local/pkgsrc/lang/gcc49
*** Error code 1

Stop.
bmake[5]: stopped in /usr/local/pkgsrc/lang/gcc49
*** Error code 1

Stop.
bmake[4]: stopped in /usr/local/pkgsrc/fonts/harfbuzz
*** Error code 1

Stop.
bmake[3]: stopped in /usr/local/pkgsrc/devel/pango
*** Error code 1

Stop.
bmake[2]: stopped in /usr/local/pkgsrc/x11/gtk2
*** Error code 1

Stop.
bmake[1]: stopped in /usr/local/pkgsrc/x11/wxGTK28
*** Error code 1

Stop.
bmake: stopped in /usr/local/pkgsrc/cross/bossa
[root@localhost bossa]#

it is take me about half a day to build it, but at last there are some errors,