checking for NSPR - version >= 4.9.6... yes
configure: error: system NSPR does not support PR_STATIC_ASSERT or including prtypes.h does not provide it
------ config.log ------
                           ^
In file included from /usr/include/nspr/obsolete/protypes.h:47:0,
                 from /usr/include/nspr/prtypes.h:549,
                 from configure:14828:
/usr/include/sys/types.h:70:18: error: two or more data types in declaration specifiers
 typedef __mode_t mode_t;
                  ^
/usr/include/sys/types.h:86:17: error: two or more data types in declaration specifiers
 typedef __off_t off_t;
                 ^
In file included from /usr/include/nspr/obsolete/protypes.h:47:0,
                 from /usr/include/nspr/prtypes.h:549,
                 from configure:14828:
/usr/include/sys/types.h:98:17: error: two or more data types in declaration specifiers
 typedef __pid_t pid_t;
                 ^
configure: failed program was:
#line 14827 "configure"
#include "confdefs.h"
#include "prtypes.h"
int main() {
#ifndef PR_STATIC_ASSERT
                 #error PR_STATIC_ASSERT not defined or requires including prtypes.h
                 #endif
; return 0; }
*** Fix above errors and then restart with               "make -f client.mk build"
make[2]: *** [configure] Error 1
make[2]: Leaving directory `/home/nbryskin/pkg/firefox-hg/src/firefox-hg'
make[1]: *** [obj-x86_64-unknown-linux-gnu/Makefile] Error 2
make[1]: Leaving directory `/home/nbryskin/pkg/firefox-hg/src/firefox-hg'
make: *** [build] Error 2