[Buildroot] partclone package issues

[Buildroot] partclone package issues

[Michael Sumulong]

I am trying to add a new package (partclone) to buildroot but I think there
may be errors in the autoconf config files or some configuration setting
with the ext2 libraries.

My current config is buildroot-2014.08 and I'm trying to add partclone
0.2.70.

I think my issue is that the partclone/configure.ac invokes a shell command
to compile a .c file but uses a hardcoded 'gcc' in the shell command. I
changed the gcc to use $cc but now it cannot find the libext2fs shared
object file. I do see libext2fs.a in output/host/usr/lib but not
libext2fs.so.2.



The error that I get occurs during the autoreconf phase:

checking for unistd.h... yes
checking ext2fs/ext2fs.h usability... yes
checking ext2fs/ext2fs.h presence... yes
checking for ext2fs/ext2fs.h... yes
checking for ext2fs_initialize in -lext2fs... yes
checking version of libextfs... ./get_lib_version: error while loading
shared libraries: libext2fs.so.2: cannot open shared object file: No such
file or directory
./get_lib_version: error while loading shared libraries: libext2fs.so.2:
cannot open shared object file: No such file or directory
./get_lib_version: error while loading shared libraries: libext2fs.so.2:
cannot open shared object file: No such file or directory
./get_lib_version: error while loading shared libraries: libext2fs.so.2:
cannot open shared object file: No such file or directory
?.?.?; bad
configure: error: Please check your libextfs!
make: ***
[/home/br/Desktop/buildroot/bin/buildroot-2014.08/output/build/partclone-0.2.70/.stamp_configured]
Error 1




partclone-0.2.70/configure.ac:

if test "$enable_extfs" = "yes"; then
#check library of some filesystems
dnl Check for EXT2/3
AC_CHECKING([ for EXT2/3 Library and Header files ... ])
AC_CHECK_HEADERS([ext2fs/ext2fs.h], ,
  AC_MSG_ERROR([*** EXT2/3 header files (ext2fs/ext2fs.h) not found])
)
AC_CHECK_LIB([ext2fs], [ext2fs_initialize], true,
    AC_MSG_ERROR([*** EXT2/3 library (libext2fs) not found]))

AC_MSG_CHECKING(version of libextfs)
extfs_version=`$cc $srcdir/src/deplib_version.c -o $srcdir/get_lib_version
-lext2fs -DEXTFS`
extfs_version=`$srcdir/get_lib_version extfs`


partclone.mk:

PARTCLONE_VERSION = 0.2.70
PARTCLONE_SOURCE = partclone-$(PARTCLONE_VERSION).tar.gz
PARTCLONE_SITE =
http://sourceforge.net/projects/partclone/files/testing/src/
PARTCLONE_INSTALL_STAGING = YES
PARTCLONE_INSTALL_TARGET = YES
PARTCLONE_AUTORECONF = YES
PARTCLONE_DEPENDENCIES = attr e2fsprogs libgcrypt lzo xz zlib
PARTCLONE_CONF_OPT = --enable-ntfs --enable-extfs --enable-fat
--enable-ncursesw

$(eval $(autotools-package))


Thanks,
Mike
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[Buildroot] partclone package issues

[Thomas Petazzoni]

Dear Michael Sumulong,

On Fri, 10 Oct 2014 15:46:02 -0400, Michael Sumulong wrote:

> I think my issue is that the partclone/configure.ac invokes a shell command
> to compile a .c file but uses a hardcoded 'gcc' in the shell command. I
> changed the gcc to use $cc but now it cannot find the libext2fs shared
> object file. I do see libext2fs.a in output/host/usr/lib but not
> libext2fs.so.2.

[...]

> partclone-0.2.70/configure.ac:
> 
> if test "$enable_extfs" = "yes"; then
> #check library of some filesystems
> dnl Check for EXT2/3
> AC_CHECKING([ for EXT2/3 Library and Header files ... ])
> AC_CHECK_HEADERS([ext2fs/ext2fs.h], ,
>   AC_MSG_ERROR([*** EXT2/3 header files (ext2fs/ext2fs.h) not found])
> )
> AC_CHECK_LIB([ext2fs], [ext2fs_initialize], true,
>     AC_MSG_ERROR([*** EXT2/3 library (libext2fs) not found]))
> 
> AC_MSG_CHECKING(version of libextfs)
> extfs_version=`$cc $srcdir/src/deplib_version.c -o $srcdir/get_lib_version
> -lext2fs -DEXTFS`
> extfs_version=`$srcdir/get_lib_version extfs`

That will not work, even using $cc, because the entire approach used in
their configure.ac script is broken: they don't simply build something,
but they also run it. So even if you manage to build this tool with $CC
pointing to the cross-compiler, there is no way the resulting binary
can be executed on your build machine.

So, instead, I'd suggest to completely remove their libext2fs version
check and instead simply use pkg-config to test that. Replace all their
version testing crap by one single line:

PKG_CHECK_MODULES([LIBEXT2FS], [libext2fs >= 1.42])

and that's it.

Of course, don't forget to add host-pkgconf to PARTCLONE_DEPENDENCIES.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

[Buildroot] partclone package issues

[Arnout Vandecappelle]

On 10/10/14 21:46, Michael Sumulong wrote:
[snip]
> partclone-0.2.70/configure.ac <http://configure.ac>:
> 
> if test "$enable_extfs" = "yes"; then
> #check library of some filesystems
> dnl Check for EXT2/3
> AC_CHECKING([ for EXT2/3 Library and Header files ... ])
> AC_CHECK_HEADERS([ext2fs/ext2fs.h], ,
>   AC_MSG_ERROR([*** EXT2/3 header files (ext2fs/ext2fs.h) not found])
> )
> AC_CHECK_LIB([ext2fs], [ext2fs_initialize], true,
>     AC_MSG_ERROR([*** EXT2/3 library (libext2fs) not found]))
> 
> AC_MSG_CHECKING(version of libextfs)
> extfs_version=`$cc $srcdir/src/deplib_version.c -o $srcdir/get_lib_version
> -lext2fs -DEXTFS`
> extfs_version=`$srcdir/get_lib_version extfs`

 This thing is clearly not cross-compile friendly. You'll have to add a patch
that replaces all this rubbish with something using PKG_CHECK_MODULES. It should
actually also update CFLAGS and LDFLAGS according the pkg-config results, so it
won't be completely trivial. But you should be able to replace about 20 lines of
configure.ac with just 4 lines using PKG_CHECK_MODULES.

 Preferably, you should also upstream that patch to introduce PKG_CHECK_MODULES,
so we don't have to carry that patch forever.


 Regards,
 Arnout

> 
> 
> partclone.mk <http://partclone.mk>:
> 
> PARTCLONE_VERSION = 0.2.70
> PARTCLONE_SOURCE = partclone-$(PARTCLONE_VERSION).tar.gz
> PARTCLONE_SITE = http://sourceforge.net/projects/partclone/files/testing/src/
> PARTCLONE_INSTALL_STAGING = YES
> PARTCLONE_INSTALL_TARGET = YES
> PARTCLONE_AUTORECONF = YES
> PARTCLONE_DEPENDENCIES = attr e2fsprogs libgcrypt lzo xz zlib
> PARTCLONE_CONF_OPT = --enable-ntfs --enable-extfs --enable-fat --enable-ncursesw
> 
> $(eval $(autotools-package))
> 
> 
> Thanks,
> Mike
> 
> 
> _______________________________________________
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> 


-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7CB5 E4CC 6C2E EFD4 6E3D A754 F963 ECAB 2450 2F1F