I am trying to build gcc-6 source package on Raspbian stretch; so I do:
apt source gcc-6
cd gcc-6-6.3.0/debian
debuild -b -uc -us
The debuild command starts the full build. Since the build crashes on my platform, what I'd like to run a command, that will unpack the sources and apply the Debian patches, but then stop before configuring (so I can apply my own patches) - and then I could continue afterwards with debuild -b -uc -us -nc.
Is there a command that would help me do that?
GCC’s packaging in Debian is somewhat unusual, and adds a number of targets that aren’t directly supported by general-purpose build tools. So you won’t find a debuild variant or anything like that to apply the patches.
Instead, invoke the patch target directly:
debian/rules patch
Once you’re ready to continue the build, do so by running
debian/rules build
followed by
fakeroot debian/rules binary
to actually build the packages.
Ultimately you’ll probably be better off adding your patches to those applied automatically during the build; to do so, add your patches to in debian/patches, and add their names to the appropriate variable in debian/rules.patch (debian_patches would be a good start).
