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Undefined reference to mempcy @ GLIBC _2.14 when compiling on Linux

I am trying to transfer an application to a device drive that uses the ftdi2332h chip from windows on Linux. I installed the libftd2xx library on an ubuntu 10.04 system according to these instructions .

When I try to compile any of the sample programs, I get the following error:

/usr/local/lib/libftd2xx.so: undefined reference to `memcpy@GLIBC_2.14'
collect2: ld returned 1 exit status

Any recommendations to fix this?

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7 answers

mempcy@GLIBC_2.14called a version symbol. Glibc uses them, while other runtime libraries, such as musl, do not .

mempcy@GLIBC_2.14 Linux , Glibc , memcpy 2012 . memcpy {begin → end} ( ). Glibc 2.13 memcpy, {end → begin} . , " " Intel SSE4.1. Glibc 2.14 memcpy, {begin → end}.

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__asm__(".symver memcpy,memcpy@GLIBC_2.2.5");

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$ cat version.c

__asm__(".symver memcpy,memcpy@GLIBC_2.2.5");
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libc /opt/lib/libcX/libc.so.6. script:

LD_LIBRARY_PATH=/opt/lib/libcX:/lib/:/usr/lib:/usr/share/lib
./your_program
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