gcc 3.4.2 -g -M interaction

[Clive Nicolson]

gcc 3.2-7 produced the following:

gcc -g -E junk.c
# 1 "junk.c"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "junk.c"

[[[[
gcc -v
Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.2/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man 
--infodir=/usr/share/info --enable-shared --enable-threads=posix 
--disable-checking --host=i386-redhat-linux --with-system-zlib 
--enable-__cxa_atexit
Thread model: posix
gcc version 3.2 20020903 (Red Hat Linux 8.0 3.2-7)
]]]]

while 3.4.2 produces the following:

gcc -g -E junk.c
# 1 "junk.c"
# 1 "/home/clive//"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "junk.c"

[[[[
gcc -v
Reading specs from /usr/lib/gcc/i386-redhat-linux/3.4.2/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man 
--infodir=/usr/share/info --enable-shared --enable-threads=posix 
--disable-checking --with-system-zlib --enable-__cxa_atexit 
--disable-libunwind-exceptions --enable-java-awt=gtk 
--host=i386-redhat-linux
Thread model: posix
gcc version 3.4.2 20041017 (Red Hat 3.4.2-6.fc3)
]]]]

Was this an intended change? The extra line causes problems when using -M .
Is this change distribution specific?

Clive