How_to_check_glibc_version_of_a_binary_in build_time

There are several ways to check the glibc version that a binary file depends on::

1. ldd command

ldd binary_file

2. objdump, disassembly

objdump -T binary_file | grep -i glibc

3. readelf

readelf -d binary_file | grep libc

check dynamic section to get libc version。

4. check the source code repo

If you can access the source code, check the building scripts for the glibc version。

5. rpm/deb package manage tools
   RPM
6. gdb debugging

gdb binary_file
print (const char*) ELF->gnu_required->name 

show the glibc SONAME version when linking。

7. strings extracting

strings binary_file | grep GLIBC

extracting glibc symbols version prefixes。