If you are getting strange crashes from vfprintf when using
GCC PPC 2.95.1, you should install these replacement includes.
Put these in lib/gcc-lib/ppc-amigaos/2.95.1/

 Jarmo Laakkonen

PERMISSION  UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP     NAME
---------- ----------- ------- ------- ------ ---------- ------------ ----------
[generic]                  266     410  64.9% -lh5- fbdc Oct 14 05:44 ppc-gcc-includes-newinc.readme
[generic]                  371     808  45.9% -lh5- bbd8 Feb  5  2000 ppc-gcc-includes-newinc/include/exception
[generic]                  797    3360  23.7% -lh5- f674 Feb  5  2000 ppc-gcc-includes-newinc/include/float.h
[generic]                  159     275  57.8% -lh5- 0111 Feb  5  2000 ppc-gcc-includes-newinc/include/iso646.h
[generic]                  716    2539  28.2% -lh5- 5b1e Feb  5  2000 ppc-gcc-includes-newinc/include/limits.h
[generic]                  485    1207  40.2% -lh5- cedd Feb  5  2000 ppc-gcc-includes-newinc/include/new
[generic]                  113     161  70.2% -lh5- 06f0 Feb  5  2000 ppc-gcc-includes-newinc/include/new.h
[generic]                 1015    2522  40.2% -lh5- 60e6 Oct 10  1996 ppc-gcc-includes-newinc/include/objc/encoding.h
[generic]                 2379    6224  38.2% -lh5- 7117 Oct 10  1996 ppc-gcc-includes-newinc/include/objc/hash.h
[generic]                 1425    3521  40.5% -lh5- 2440 Oct 10  1996 ppc-gcc-includes-newinc/include/objc/list.h
[generic]                  645    1125  57.3% -lh5- b58a Oct 10  1996 ppc-gcc-includes-newinc/include/objc/NXConstStr.h
[generic]                 4411   16059  27.5% -lh5- 3240 Oct 10  1996 ppc-gcc-includes-newinc/include/objc/objc-api.h
[generic]                 1920    5264  36.5% -lh5- ae80 Oct 10  1996 ppc-gcc-includes-newinc/include/objc/objc.h
[generic]                 1472    3504  42.0% -lh5- eec1 Oct 10  1996 ppc-gcc-includes-newinc/include/objc/Object.h
[generic]                  903    1860  48.5% -lh5- cb63 Oct 10  1996 ppc-gcc-includes-newinc/include/objc/Protocol.h
[generic]                 1929    5917  32.6% -lh5- e337 Oct 10  1996 ppc-gcc-includes-newinc/include/objc/sarray.h
[generic]                 1589    4238  37.5% -lh5- 239b Oct 10  1996 ppc-gcc-includes-newinc/include/objc/typedstream.h
[generic]                  114     137  83.2% -lh5- 72fa Feb  5  2000 ppc-gcc-includes-newinc/include/proto.h
[generic]                  279     495  56.4% -lh5- 6e32 Feb  5  2000 ppc-gcc-includes-newinc/include/README
[generic]                 2006    6215  32.3% -lh5- 53cf Feb  5  2000 ppc-gcc-includes-newinc/include/stdarg.h
[generic]                  286     502  57.0% -lh5- 6f6d Feb  5  2000 ppc-gcc-includes-newinc/include/stdbool.h
[generic]                 2823    9859  28.6% -lh5- 8999 Feb  5  2000 ppc-gcc-includes-newinc/include/stddef.h
[generic]                  204     330  61.8% -lh5- 4f1e Feb  5  2000 ppc-gcc-includes-newinc/include/syslimits.h
[generic]                  455    1049  43.4% -lh5- fa62 Feb  5  2000 ppc-gcc-includes-newinc/include/typeinfo
[generic]                 1247    3377  36.9% -lh5- 8758 Feb  5  2000 ppc-gcc-includes-newinc/include/va-alpha.h
[generic]                 1110    3289  33.7% -lh5- 340a Feb  5  2000 ppc-gcc-includes-newinc/include/va-arc.h
[generic]                  456     970  47.0% -lh5- 2bf3 Feb  5  2000 ppc-gcc-includes-newinc/include/va-c4x.h
[generic]                  815    2036  40.0% -lh5- a8ae Feb  5  2000 ppc-gcc-includes-newinc/include/va-clipper.h
[generic]                  655    1591  41.2% -lh5- a9ef Feb  5  2000 ppc-gcc-includes-newinc/include/va-h8300.h
[generic]                 2026    6652  30.5% -lh5- 7c25 Feb  5  2000 ppc-gcc-includes-newinc/include/va-i860.h
[generic]                 1045    2465  42.4% -lh5- 857b Feb  5  2000 ppc-gcc-includes-newinc/include/va-i960.h
[generic]                  883    2409  36.7% -lh5- ccbb Feb  5  2000 ppc-gcc-includes-newinc/include/va-m32r.h
[generic]                 1088    2845  38.2% -lh5- fccb Feb  5  2000 ppc-gcc-includes-newinc/include/va-m88k.h
[generic]                 2079   10279  20.2% -lh5- 499e Feb  5  2000 ppc-gcc-includes-newinc/include/va-mips.h
[generic]                  529    1299  40.7% -lh5- 4a67 Feb  5  2000 ppc-gcc-includes-newinc/include/va-mn10200.h
[generic]                  497    1240  40.1% -lh5- 0f5e Feb  5  2000 ppc-gcc-includes-newinc/include/va-mn10300.h
[generic]                  690    1656  41.7% -lh5- 7cb3 Feb  5  2000 ppc-gcc-includes-newinc/include/va-pa.h
[generic]                 2359    8159  28.9% -lh5- ee27 Feb  5  2000 ppc-gcc-includes-newinc/include/va-ppc.h
[generic]                 1737    4057  42.8% -lh5- 9da9 Feb  5  2000 ppc-gcc-includes-newinc/include/va-pyr.h
[generic]                 2023    6756  29.9% -lh5- e17d Feb  5  2000 ppc-gcc-includes-newinc/include/va-sh.h
[generic]                 1720    5151  33.4% -lh5- ba4c Feb  5  2000 ppc-gcc-includes-newinc/include/va-sparc.h
[generic]                  720    1777  40.5% -lh5- 02d6 Feb  5  2000 ppc-gcc-includes-newinc/include/va-spur.h
[generic]                  477    1174  40.6% -lh5- 5d66 Feb  5  2000 ppc-gcc-includes-newinc/include/va-v850.h
[generic]                 2070    6416  32.3% -lh5- ddfb Feb  5  2000 ppc-gcc-includes-newinc/include/varargs.h
---------- ----------- ------- ------- ------ ---------- ------------ ----------
 Total        44 files   50988  151179  33.7%            Oct 14 20:13