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patch -p3 < path/to/cppfilt.diff
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> gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.5.2/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.5.2-8ubuntu4' --with-bugurl=file:///usr/share/doc/gcc-4.5/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.5 --enable-shared --enable-multiarch --with-multiarch-defaults=x86_64-linux-gnu --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib/x86_64-linux-gnu --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.5 --libdir=/usr/lib/x86_64-linux-gnu --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-plugin --enable-gold --enable-ld=default --with-plugin-ld=ld.gold --enable-objc-gc --disable-werror --with-arch-32=i686 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4)
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> gcc-4.6.1 -v
Using built-in specs.
COLLECT_GCC=gcc-4.6.1
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/4.6.1/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.6.1/configure --prefix=/usr/local --program-suffix=-4.6.1 --enable-languages=c,c++ --enable-version-specific-runtime-libs
Thread model: posix
gcc version 4.6.1 (GCC)
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CC=gcc-4.4 CXX=g++-4.4
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$PREFIX/lib/gcc/x86_64-linux-gnu/lib{64,32}/libgcc_s.so
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$PREFIX/lib/gcc/x86_64-linux-gnu/4.6.1, $PREFIX/lib64, $PREFIX/lib
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-Wl,-rpath,$PREFIX/lib/gcc/x86_64-linux-gnu/4.6.1