[Bug c/57653] filename information discarded when using -imacros

[allan at archlinux dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57653

--- Comment #5 from Allan McRae <allan at archlinux dot org> ---
I still get this with r200224

# gcc-4.9 -v
Using built-in specs.
COLLECT_GCC=gcc-4.9
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /build/gcc-git/src/gcc/configure --prefix=/usr
--libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --datadir=/usr/share/gcc-4.9
--with-bugurl='http://aur.archlinux.org/packages.php?ID=16045'
--enable-languages=c,c++,lto --enable-shared --enable-threads=posix
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-clocale=gnu --disable-libstdcxx-pch --enable-gnu-unique-object
--enable-linker-build-id --enable-cloog-backend=isl
--disable-cloog-version-check --enable-lto --enable-gold --enable-ld=default
--enable-plugin --with-plugin-ld=ld.gold --with-linker-hash-style=gnu
--disable-install-libiberty --disable-multilib --disable-libssp
--disable-werror --enable-checking=release --program-suffix=-4.9
--enable-version-specific-runtime-libs
Thread model: posix
gcc version 4.9.0 20130619 (experimental) (GCC)

Built with 

CFLAGS="-march=x86-64 -mtune=generic -O2 -fstack-protector
--param=ssp-buffer-size=4"
LDFLAGS="-Wl,-O1,--sort-common,--as-needed,-z,relro"