svn-r152128 failed make bootstrap4-lean quite early with: (don't worry about the r150353 part below - I had to ftp a diff from one machine to the machine which does the building, so I only transport a diff from an earlier checkout).

gcc -c  -g -fkeep-inline-functions -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Wold-style-definition -Wc++-compat -fno-common  -DHAVE_CONFIG_H -I. -I. -I../../gcc-r150353/gcc -I../../gcc-r150353/gcc/. -I../../gcc-r150353/gcc/../include -I./../intl -I../../gcc-r150353/gcc/../libcpp/include  -I../../gcc-r150353/gcc/../libdecnumber -I../../gcc-r150353/gcc/../libdecnumber/dpd -I../libdecnumber   -I/usr/local/include ../../gcc-r150353/gcc/dfp.c -o dfp.o
In file included from ../../gcc-r150353/gcc/../libdecnumber/decContext.h:54,
                 from ../../gcc-r150353/gcc/../libdecnumber/decNumber.h:37,
                 from ../../gcc-r150353/gcc/../libdecnumber/dpd/decimal128.h:58,
                 from ../../gcc-r150353/gcc/dfp.c:34:
../libdecnumber/gstdint.h:80: error: two or more data types in declaration specifiers
../libdecnumber/gstdint.h:80: error: two or more data types in declaration specifiers
../libdecnumber/gstdint.h:80: error: two or more data types in declaration specifiers
../libdecnumber/gstdint.h:80: warning: useless type name in empty declaration
../libdecnumber/gstdint.h:85: error: two or more data types in declaration specifiers
../libdecnumber/gstdint.h:85: error: two or more data types in declaration specifiers
../libdecnumber/gstdint.h:85: error: two or more data types in declaration specifiers
../libdecnumber/gstdint.h:85: error: two or more data types in declaration specifiers
../libdecnumber/gstdint.h:85: warning: useless type name in empty declaration
make[3]: *** [dfp.o] Error 1
make[3]: Leaving directory `/home/htl10/tmp-build/ob-dir/gcc'
make[2]: *** [all-stage1-gcc] Error 2
make[2]: Leaving directory `/home/htl10/tmp-build/ob-dir'
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory `/home/htl10/tmp-build/ob-dir'
make: *** [bootstrap4-lean] Error 2
bash-2.05a$ 
-----------------------------

it is a generated file, and it doesn't seem to like the two typedef int64_t lines:

---------------------------
/* Define intmax based on what we found */
#ifdef _INT64_T  
typedef int64_t       intmax_t;
#else 
typedef long          intmax_t;
#endif           
#ifdef _UINT64_T
typedef uint64_t      uintmax_t;
#else                                              
typedef unsigned long uintmax_t;
#endif          
-------------------------