Package: dpkg-dev
Version: 1.16.10
Severity: normal
Dear Maintainer,
I work on an i386 package which I build on an amd64 host. To do so I use
CC='gcc -m32' which produces binaries of the right type. Yet dpkg-architecture
gives me the following warning:
dpkg-architecture: warning: specified GNU system type i486-linux-gnu does not
match gcc system type x86_64-linux-gnu, try setting a correct CC environment
variable
As far as I can tell this comes from the following line in
get_gcc_host_gnu_type() of /usr/share/perl5/Dpkg/Arch.pm:
my $gcc_host_gnu_type = `\${CC:-gcc} -dumpmachine`;
My understanding is that '-dumpmachine' always prints the compiler's default
target machine. Indeed:
$ gcc -dumpmachine
x86_64-linux-gnu
$ gcc -m32 -dumpmachine
x86_64-linux-gnu
That's even probably the appropriate result for get_gcc_host_gnu_type().
However I don't think that's what dpkg-architecture should be comparing to the
package's target architecture, particularly not when suggesting to fix $CC.
I think checking the value of '$CC -print-multiarch' would be more appropriate:
$ gcc -print-multiarch
x86_64-linux-gnu
$ gcc -m32 -print-multiarch
i386-linux-gnu
That will leave the issue of i386 vs. i486 which should not cause a warning if
I read bug #302033 correctly.
#302033 dpkg-architecture: Specified GNU system type i386-linux does not match
gcc system type i486-linux-gnu
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=302033
I have uploaded a test package there:
http://fgouget.free.fr/bugs/testarch_1.0-1.tar.gz
-- System Information:
Debian Release: jessie/sid
APT prefers testing
APT policy: (990, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.2.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages dpkg-dev depends on:
ii base-files 7.2
ii binutils 2.22-8
ii bzip2 1.0.6-4
ii libdpkg-perl 1.16.10
ii make 3.81-8.2
ii patch 2.6.1-3
ii xz-utils 5.1.1alpha+20120614-2
Versions of packages dpkg-dev recommends:
ii build-essential 11.6
ii fakeroot 1.18.4-2
ii gcc [c-compiler] 4:4.7.2-1
ii gcc-4.6 [c-compiler] 4.6.4-2
ii gcc-4.7 [c-compiler] 4.7.3-4
ii gnupg 1.4.12-7
ii gpgv 1.4.12-7
ii libalgorithm-merge-perl 0.08-2
Versions of packages dpkg-dev suggests:
ii debian-keyring 2013.04.21
-- no debconf information
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