Package: src:libffado
Version: 2.2.1-2
Severity: wishlist
Tags: patch
User: debian-...@lists.debian.org
Usertags: port-x32 ftbfs-x32
Hi!
I'm afraid libffado tries to use -m32 on x32 (instead of -mx32, or, better,
no such switch at all). This is because of pretty bizarre platform
detection, which runs objdump on /bin/mount then looks for certain strings.
That will obviously break also for multiarch or cross-compilation.
The attached patch solves the x32 issue, without fixing detection otherwise.
Meow!
-- System Information:
Debian Release: 8.0
APT prefers unstable
APT policy: (600, 'unstable'), (500, 'unreleased'), (50, 'experimental')
Architecture: x32 (x86_64)
Kernel: Linux 3.19.0-x32 (SMP w/6 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)
Description: detect x32
This patch fixes misdetection of x32 as i386, and makes it pass -mx32 instead
of -m32 (what's the purpose of forcing this flag???).
.
Unlike detection of 32/64-bitness, it asks the configured compiler instead of
objdumping /bin/mount. If somehow you prefer that way instead, the string
would be: "file format elf32-x86-64".
Author: Adam Borowski <kilob...@angband.pl>
--- libffado-2.2.1.orig/SConstruct
+++ libffado-2.2.1/SConstruct
@@ -659,6 +659,21 @@ def is_userspace_32bit(cpuinfo):
return answer
+def is_userspace_x32():
+ """Check if the chosen compiler targets x32.
+ """
+ # Doing this instead of bizarre checks for /bin/mounts, this works
+ # in multiarch/multilib or crosscompiling scenarios.
+ cc = os.getenv('CC')
+ if cc == None:
+ cc = 'cc'
+ x = outputof(cc, '-dumpmachine')
+ for line in x.split('\n'):
+ if line.endswith('x32'):
+ return True
+ return None
+
+
def cc_flags_x86(cpuinfo, enable_optimizations):
"""add certain gcc -m flags based on CPU features
"""
@@ -758,7 +773,11 @@ if cpuinfo.is_powerpc:
machineflags = { 'CXXFLAGS' : ['-m64'] }
env.MergeFlags( machineflags )
elif cpuinfo.is_x86:
- if m32:
+ if is_userspace_x32():
+ print "Doing an x32 %s build for %s" % (cpuinfo.machine, cpuinfo.model_name)
+ machineflags = { 'CXXFLAGS' : ['-mx32'] }
+ needs_fPIC = True
+ elif m32:
print "Doing a 32-bit %s build for %s" % (cpuinfo.machine, cpuinfo.model_name)
machineflags = { 'CXXFLAGS' : ['-m32'] }
else:
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