On Sun, Mar 21, 2010 at 2:56 PM, Daniel Herring
<address@hidden> wrote:
On Sun, 21 Mar 2010, Ersin Akinci wrote:
I've been trying to build DirectFB, and I think that I've narrowed down a bug in the build process to what might be a confusing
make or libtool behavior. I've been cross-compiling using --sysroot for gcc so that everything will link against a custom set
of libraries that I've built. Here's my full configure line (the important part is to note that
--sysroot=/home/ersin/vorpo/toolchain):
DirectFB chokes, however, when it starts to build a certain tool, directfb-csource, that requires libpng. Here's the relevant
part from the build:
address@hidden DirectFB-1.4.3]$ make directfb-csource
make -C tools directfb-csource
make[1]: Entering directory `/home/ersin/vorpo/build/DirectFB-1.4.3/tools'
i386-linux-gcc --sysroot=/home/ersin/vorpo/toolchain -DHAVE_CONFIG_H -I. -I.. -I../lib -I../include -I../include -I../lib
-I../src -DDATADIR=\"/usr/share/directfb-1.4.3\" -D_REENTRANT -I/usr/include/freetype2 -O3 -ffast-math -pipe -Os
-D_GNU_SOURCE -Werror-implicit-function-declaration -MT directfb-csource.o -MD -MP -MF .deps/directfb-csource.Tpo -c -o
directfb-csource.o directfb-csource.c
mv -f .deps/directfb-csource.Tpo .deps/directfb-csource.Po
/bin/sh ../libtool --tag=CC --mode=link i386-linux-gcc --sysroot=/home/ersin/vorpo/toolchain -I/usr/include/freetype2 -O3
-ffast-math -pipe -Os -D_GNU_SOURCE -Werror-implicit-function-declaration -o directfb-csource directfb-csource.o -lpng12 -ldl
-lpthread
mkdir .libs
i386-linux-gcc --sysroot=/home/ersin/vorpo/toolchain -I/usr/include/freetype2 -O3 -ffast-math -pipe -Os -D_GNU_SOURCE
-Werror-implicit-function-declaration -o directfb-csource directfb-csource.o /usr/lib/libpng12.so -ldl -lpthread
/home/ersin/vorpo/build/buildroot-2010.02/output/staging/usr/bin-ccache/../lib/gcc/i386-linux-uclibc/4.3.4/../../../../i386-lin
ux-uclibc/bin/ld: warning: libm.so.6, needed by /usr/lib/libpng12.so, not found (try using -rpath or -rpath-link)
/home/ersin/vorpo/build/buildroot-2010.02/output/staging/usr/bin-ccache/../lib/gcc/i386-linux-uclibc/4.3.4/../../../../i386-lin
ux-uclibc/bin/ld: warning: libc.so.6, needed by /usr/lib/libpng12.so, not found (try using -rpath or -rpath-link)
/usr/lib/libpng12.so: undefined reference to address@hidden'
...
collect2: ld returned 1 exit status
make[1]: *** [directfb-csource] Error 1
make[1]: Leaving directory `/home/ersin/vorpo/build/DirectFB-1.4.3/tools'
make: *** [directfb-csource] Error 2
address@hidden DirectFB-1.4.3]$
Something strange is going on here. Look at the lines after "mkdir .libs" carefully:
It looks like libtool is reading the wrong .la file and changing paths on you. The output of `libtool --version` might be useful. For proper debugging,
# cd /home/ersin/vorpo/build/DirectFB-1.4.3/tools
# /bin/sh ../libtool --debug --tag=CC --mode=link i386-linux-gcc --sysroot=/home/ersin/vorpo/toolchain -I/usr/include/freetype2 -O3 -ffast-math -pipe -Os -D_GNU_SOURCE -Werror-implicit-function-declaration -o directfb-csource directfb-csource.o -lpng12 -ldl -lpthread > libtool-debug.txt
Search this for the first occurrance of /usr/lib/libpng12.so and then look backwards for a .la. Or just grep the /usr/lib/libpng12.la text file. If you find this path in an offending .la file, rename that file to .la-bak and try recompiling.
These .la files can be absolutely essential in some situations, and a complete nightmare in others.
The .la file problem is my first guess. If its not the issue, then upload the libtool-debug.txt file to a paste bin somewhere and submit a link to this list.
- Daniel