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copied!<p>Works for me:</p> <pre><code>$ cat main.h #pragma once class Foo; struct FoobarPackage { FoobarPackage(Foo *fooObj) { soso = fooObj; } Foo *soso; }; $ cat Foo.cpp #pragma once #include "main.h" class Foo { public: void doSomething(bool ololo) { if (ololo) ; //do something else } }; $ cat bar.cpp #pragma once #include "main.h" #include "Foo.cpp" class Bar { bool killAllHumans(FoobarPackage planet) { planet.soso->doSomething(true); return true; } }; $ g++ -c bar.cpp bar.cpp:1:9: warning: #pragma once in main file $ $ g++ -v Using built-in specs. Target: i486-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.4.3-4ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.4/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared --enable-multiarch --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.4 --program-suffix=-4.4 --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-plugin --enable-objc-gc --enable-targets=all --disable-werror --with-arch-32=i486 --with-tune=generic --enable-checking=release --build=i486-linux-gnu --host=i486-linux-gnu --target=i486-linux-gnu Thread model: posix gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) $ </code></pre> <p><strong>EDIT</strong>: As <em>everyone</em> has pointed out, this program is still very buggy. Not least of which is that it <code>#include</code>s a CPP file for no obvious reason.</p>

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