On 09/03/2016 02:13 PM, R n wrote:
conf.env['CXXFLAGS'].append('-fPIC')
conf.env['CXXFLAGS'].append('-DPIC')
[...]
'--extra-libs=-L /lib64 -lstdc++ -lmylibrarytest',
.../binutils/2.25/centos6-native/da39a3e/bin/ld:
.../mylibrary/0.1/gcc-4.9-glibc-2.20-fb/8fd4fe1/lib/libmylibrary.a(my_file.cpp.o):
relocation R_X86_64_32 against `.bss' can not be used when making a shared
object; recompile with -fPIC
-fPIC is for shared objects, you have to compile all the object code with -fPIC
to build a shared library.
libmylibrary.a is a static lib so you probably should not be using -fPIC
The -lstdc++ indicates you are at least linking against it.
Are you doing a cross compile? Centos 6 should be gcc 4.4.7ish and I thought
4.9 was Centos 7
.../mylibrary/0.1/gcc-4.9-glibc-2.20/8fd4fe1/lib/libmylibrary.a: error adding
symbols: Bad value
So:
1. C++ etc to make the library
2. cc -c your_files.c
3. C++ -llibrary your_files.o
In these errors:
.../binutils/2.25/centos6-native/da39a3e/bin/ld:
.../mylibrary/0.1/gcc-4.9-glibc-2.20/80414d5/lib/libmylibrary.a(mylibrary_file.cpp.o):
undefined reference to symbol '_ZdlPv@@GLIBCXX_3.4'
.../libgcc/4.9.x/gcc-4.9-glibc-2.20/024dbc3/lib/libstdc++.so: error adding
symbols: DSO missing from command line
“glibcxx” suggests it’s missing the C++ support library, like if you’re linking
with cc instead of c++ compiler.
Can you paste just the library compile command, it should look something like
this:
g++ -g -std=c++0x -Wall -Wextra -DDEBUG -I/.../ some files [...] -lblah -lblah
[...]
or
cc -Wblah blah somefiles -I/.../blah -L/somepath blah blah
If you are using cmake, add VERBOSE=1 to see all the commands for each
compilation
Thanks
cco
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