On Sat, Oct 1, 2016 at 5:09 AM, mackowiakp <mackowiakp@xxxxx> wrote:
> Sorry for my ignorance, but I just started with libFTDI.
> OK. I download ftdi.h from
> http://www.intra2net.com/en/developer/libftdi/download.php and place it in
> /opt/include. OpenWTR does not provide libftdi1-dev. Now I try to compile
> program again using the same compiler command. That is:
>
> gcc -v -Wl,-rpath=/opt/usr/local/lib
> -Wl,--dynamic-linker=/opt/lib/ld-linux.so.3 -L/opt/lib -O2 -pipe
> -march=armv7-a -mtune=cortex-a9 -fno-caller-saves -mfloat-abi=soft -l ftdi1
> d.c -o d
>
> It fails because "/opt/bin/ld: cannot find -lftdi1".
>
> But there is /opt/usr/local/lib/libftdi1.so linked to libftdi1.so.2
>
> My LD_LIBRARY_PATH looks like this:
> /lib:/usr/lib:/usr/local/lib:/opt/lib:/opt/usr/lib:/opt/include:/opt/usr/local/lib:/opt/usr/include
>
> So what the problem is?
>
> Below output from compilation process:
>
> Using built-in specs.
> COLLECT_GCC=gcc
> COLLECT_LTO_WRAPPER=/opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/lto-wrapper
> Target: arm-openwrt-linux-gnueabi
> Configured with:
> /media/ware3/Entware-ng.2016.08/build_dir/target-arm_cortex-a9_glibc-2.23_eabi/gcc-5.4.0/configure
> --target=arm-openwrt-linux --host=arm-openwrt-linux --build=x86_64-linux-gnu
> --program-prefix= --program-suffix= --prefix=/opt --exec-prefix=/opt
> --bindir=/opt/bin --sbindir=/opt/sbin --libexecdir=/opt/lib
> --sysconfdir=/opt/etc --datadir=/opt/share --localstatedir=/opt/var
> --mandir=/opt/man --infodir=/opt/info --disable-nls --build=x86_64-linux-gnu
> --host=arm-openwrt-linux-gnueabi --target=arm-openwrt-linux-gnueabi
> --enable-languages=c,c++ --with-bugurl=https://dev.openwrt.org/
> --with-pkgversion='OpenWrt GCC 5.4.0' --enable-shared --enable-__cxa_atexit
> --with-default-libstdcxx-abi=gcc4-compatible --enable-target-optspace
> --with-gnu-ld --with-stage1-ldflags='-Wl,-rpath=/opt/lib
> -Wl,--dynamic-linker=/opt/lib/ld-linux.so.3'
> --with-boot-ldflags='static-libstdc++ -static-libgcc -Wl,-rpath=/opt/lib
> -Wl,--dynamic-linker=/opt/lib/ld-linux.so.3' --disable-nls
> --disable-libsanitizer --disable-libvtv --disable-libcilkrts
> --disable-libmudflap --disable-multilib --disable-libgomp
> --disable-libquadmath --disable-libssp --disable-decimal-float
> --disable-libstdcxx-pch --with-host-libstdcxx=-lstdc++ --prefix=/opt
> --libexecdir=/opt/lib --with-local-prefix=/opt --with-float=soft
> --with-default-libstdcxx-abi=gcc4-compatible
> Thread model: posix
> gcc version 5.4.0 (OpenWrt GCC 5.4.0)
> COLLECT_GCC_OPTIONS='-v' '-L/opt/lib' '-O2' '-pipe' '-march=armv7-a'
> '-mtune=cortex-a9' '-fno-caller-saves' '-mfloat-abi=soft' '-o' 'd'
> '-mtls-dialect=gnu'
> /opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/cc1 -quiet -v -imultilib .
> -imultiarch arm-linux-gnueabi d.c -quiet -dumpbase d.c -march=armv7-a
> -mtune=cortex-a9 -mfloat-abi=soft -mtls-dialect=gnu -auxbase d -O2 -version
> -fno-caller-saves -o - |
> as -v -march=armv7-a -mfloat-abi=soft -meabi=5 -o /opt/tmp/ccbT3J1L.o
> GNU assembler version 2.26.1 (arm-openwrt-linux-gnueabi) using BFD version
> (GNU Binutils) 2.26.1
> GNU C11 (OpenWrt GCC 5.4.0) version 5.4.0 (arm-openwrt-linux-gnueabi)
> compiled by GNU C version 5.4.0, GMP version 4.3.2, MPFR version
> 2.4.2, MPC version 0.8.1
> GGC heuristics: --param ggc-min-expand=47 --param ggc-min-heapsize=31954
> ignoring nonexistent directory "/opt/include/arm-linux-gnueabi"
> ignoring nonexistent directory
> "/opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/../../../../arm-openwrt-linux-gnueabi/include"
> ignoring nonexistent directory "/usr/include/arm-linux-gnueabi"
> ignoring nonexistent directory "/usr/include"
> #include "..." search starts here:
> #include <...> search starts here:
> /opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/include
> /opt/include
> /opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/include-fixed
> End of search list.
> GNU C11 (OpenWrt GCC 5.4.0) version 5.4.0 (arm-openwrt-linux-gnueabi)
> compiled by GNU C version 5.4.0, GMP version 4.3.2, MPFR version
> 2.4.2, MPC version 0.8.1
> GGC heuristics: --param ggc-min-expand=47 --param ggc-min-heapsize=31954
> Compiler executable checksum: a589712d81e28a1300ccb0e03d994135
> d.c: In function 'main':
> d.c:4:18: warning: implicit declaration of function 'Sleep'
> [-Wimplicit-function-declaration]
> #define sleep(x) Sleep(x)
> ^
> d.c:34:5: note: in expansion of macro 'sleep'
> sleep(3);
> ^
> COMPILER_PATH=/opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/:/opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/:/opt/lib/gcc/arm-openwrt-linux-gnueabi/:/opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/:/opt/lib/gcc/arm-openwrt-linux-gnueabi/
> LIBRARY_PATH=/opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/:/opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/../../../:/lib/:/usr/lib/
> COLLECT_GCC_OPTIONS='-v' '-L/opt/lib' '-O2' '-pipe' '-march=armv7-a'
> '-mtune=cortex-a9' '-fno-caller-saves' '-mfloat-abi=soft' '-o' 'd'
> '-mtls-dialect=gnu'
> /opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/collect2 -plugin
> /opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/liblto_plugin.so
> -plugin-opt=/opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/lto-wrapper
> -plugin-opt=-fresolution=/opt/tmp/cc87OOFR.res
> -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s
> -plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc
> -plugin-opt=-pass-through=-lgcc_s --eh-frame-hdr -dynamic-linker
> /lib/ld-linux.so.3 -X -m armelf_linux_eabi -o d
> /opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/crt1.o
> /opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/crti.o
> /opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/crtbegin.o -L/opt/lib
> -L/opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0
> -L/opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/../../..
> -rpath=/opt/usr/local/lib --dynamic-linker=/opt/lib/ld-linux.so.3 -lftdi1
> /opt/tmp/ccbT3J1L.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc
> --as-needed -lgcc_s --no-as-needed
> /opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/crtend.o
> /opt/lib/gcc/arm-openwrt-linux-gnueabi/5.4.0/crtn.o
> /opt/bin/ld: cannot find -lftdi1
> collect2: error: ld returned 1 exit status
>
>
>
I think you've identified the correct issue in terms of the library
not being found. I'm guessing the linker paths for gcc aren't correct.
What if you add -L/opt/usr/local/lib/ to your compilation line?
Is LD_LIBRARY_PATH used by ld when invoked during compilation? It
seems like it should be but I'm used to using that when attempting to
run an application that needs a library that I've built in a local
directory somewhere and haven't installed at the system level.
Chris
--
libftdi - see http://www.intra2net.com/en/developer/libftdi for details.
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