On 10/03/2016 04:24 AM, Chris Morgan wrote:
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.
To unsubscribe send a mail to libftdi+unsubscribe@xxxxxxxxxxxxxxxxxxxxxxx
Try running ldconfig -v on your system. The -v option makes it display
all the links that it creates for libraries. You can pipe the output to
grep to see if libfti is actually on the linker search path.
Also looks like a #define needs fixing or you need to include <unistd.h>
or equivalent for sleep().
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);
Ryan
--
217-351-2655 ext. 126
Distant Focus Corporation
4114B Fieldstone Rd
Champaign, IL 61822
http://jupiter.distantfocus.com/projects/
--
libftdi - see http://www.intra2net.com/en/developer/libftdi for details.
To unsubscribe send a mail to libftdi+unsubscribe@xxxxxxxxxxxxxxxxxxxxxxx
|
