From 06b555b6d5baadb6fe73e5d8a9fd640602908251 Mon Sep 17 00:00:00 2001 From: Thomas Petazzoni Date: Mon, 20 Feb 2017 23:43:55 +0100 Subject: [PATCH] btrfs-progs: don't use with uClibc This commit adds a patch to btrfs-progs that fixes the build of docker-engine, and possibly other packages including kerncompat.h from btrfs-progs. For the btrfs-progs build itself, a --disable-backtrace option allows to indicate whether backtrace()/ support should be used or not. However, once btrfs-progs is installed, it simply looks at whether __GLIBC__ is defined or not to decide to use backtrace() or not. However, uClibc defines __GLIBC__ but does not provide backtrace() functionality. The additional patch tweaks the kerncompat.h to look at __UCLIBC__ and not use backtrace() functionality in this case. Fixes: http://autobuild.buildroot.net/results/9dc9370a79c5c44e6c92be6a44334842c211d923/ Signed-off-by: Thomas Petazzoni --- ...ine-BTRFS_DISABLE_BACKTRACE-when-bui.patch | 42 +++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 package/btrfs-progs/0002-kerncompat.h-define-BTRFS_DISABLE_BACKTRACE-when-bui.patch diff --git a/package/btrfs-progs/0002-kerncompat.h-define-BTRFS_DISABLE_BACKTRACE-when-bui.patch b/package/btrfs-progs/0002-kerncompat.h-define-BTRFS_DISABLE_BACKTRACE-when-bui.patch new file mode 100644 index 0000000000..9c1173b3fe --- /dev/null +++ b/package/btrfs-progs/0002-kerncompat.h-define-BTRFS_DISABLE_BACKTRACE-when-bui.patch @@ -0,0 +1,42 @@ +From 1fc5444f5620670bb9d293be4f92df59661e1810 Mon Sep 17 00:00:00 2001 +From: Thomas Petazzoni +Date: Mon, 20 Feb 2017 23:31:24 +0100 +Subject: [PATCH] kerncompat.h: define BTRFS_DISABLE_BACKTRACE when building + with uClibc + +uClibc does not provide backtrace() nor . When building +btrfs-progs, passing --disable-backtrace is enough to make it build with +uClibc. But once btrfs-progs is installed and another program/library +includes kerncompat.h, it fails to build with uClibc, because +BTRFS_DISABLE_BACKTRACE is not defined. + +The most correct fix for this would be to have kerncompat.h generated +from kerncompat.h.in during the btrfs-progs build process, and tuned +depending on autoconf/automake variables. But as a quick fix that +follows the current strategy, we simply tweak the existing __GLIBC__ +conditional. Indeed, uClibc pretends to be glibc and defines __GLIBC__, +but it does not replace it completely, hence the need to define +BTRFS_DISABLE_BACKTRACE when __GLIBC__ is not defined *or* when +__UCLIBC__ is defined. + +Signed-off-by: Thomas Petazzoni +--- + kerncompat.h | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/kerncompat.h b/kerncompat.h +index 0f207b7..e47d164 100644 +--- a/kerncompat.h ++++ b/kerncompat.h +@@ -32,7 +32,7 @@ + + #include + +-#ifndef __GLIBC__ ++#if !defined(__GLIBC__) || defined(__UCLIBC__) + #ifndef BTRFS_DISABLE_BACKTRACE + #define BTRFS_DISABLE_BACKTRACE + #endif +-- +2.7.4 +