Go build with another glibc

Question

I have installed another version of GLIBC and want to compile Golang code against this new GLIBC.

I have tried the following command for dynamic compilation:

go build --ldflags '-linkmode external -L /path/to/another_glibc/

But when I run ldd "go_executable", it still shows linked to default glibc.

Output:

linux-vdso.so.1 =>  (0x00007fff29da7000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f128a93c000)
/lib64/ld-linux-x86-64.so.2 (0x00007f128ad06000)

Expected Output:

linux-vdso.so.1 =>  (0x00007fff45fa7000)
libc.so.6 => /another_glibc/lib/libc.so.6 (0x00007f5cd2067000)
/another_glibc/ld-2.29.so => /lib64/ld-linux-x86-64.so.2 (0x00007f5cd2420000)

What is missing here?

Answer 1

Before doing go build Set

CGO_LDFLAGS

Dynamic:

export CGO_LDFLAGS="-Xlinker -rpath=/path/to/another_glibc/lib"

Static:

export CGO_LDFLAGS="-Xlinker -rpath=/path/to/another_glibc/lib -static"

CGO_LDFLAGS lets you set GCC-like ld flags for Go.

Answer 2

bitbyter's answer is not correct for the dynamic case because it requires that the system dynamic linker is compatible with the non-system glibc, which is unlikely. You can set the dynamic linker like this:

export CGO_LDFLAGS="-Xlinker -rpath=/path/to/another_glibc/lib64"
CGO_LDFLAGS="$CGO_LDFLAGS -Xlinker --dynamic-linker="/path/to/another_glibc/lib64/ld-linux-x86-64.so.2"

The dynamic linker name is specific to the architecture, so you have to research its name.