Re: Using /usr/lib/gcc-cross/ for triples
On 06/27/2013 10:28 AM, Stephen Kelly wrote:
However, I still don't understand what scenario could lead to a
problem. I'll guess, and you tell me if I'm right.
1) We have a arm-linux-gnueabihf installation of debian and we install
the gcc package natively. This installs the C runtime files to
/usr/lib/gcc/arm-linux-gnueabihf as it is a native installation.
2) We then install the gcc-arm-linux-gnueabihf cross-compiler package
(why would we do that?). This installs the C runtime files to
/usr/lib/gcc-cross/arm-linux-gnueabihf as it is a cross installation.
2.1) If the package instead installed the files to /usr/lib/gcc/, the
packages would be in conflict. This is the problem. (Why would this be
a problem? Is it not reasonable to expect a conflict when installing a
cross-compiler for the current native platform?)
2.2) The C runtime files for gcc-arm-linux-gnueabihf actually differ
between the cross-compiler and the native compiler. This is the
problem, so they must be kept separate.
I guess only one of 2.1 and 2.2 is correct.
I got confirmation from xnox on IRC that 2.2 is correct.
He also refined the scenario a bit to having an amd64 host with a native
amd64 compiler and a native i386 compiler and a i386 cross compiler. As
the C runtime files for the native i386 compiler and the i386 cross
compiler are different, they need to be in separate directories.
Similarly, one might have an arm64 host with armhf native and armhf
cross compilers. The /usr/lib/gcc-cross/arm-linux-gnueabihf/ content is
for the cross compiler, and the incompatible
/usr/lib/gcc/arm-linux-gnueabihf/ for the native one.
Thanks,
Steve.
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