/usr/src/gcc-5/debian/libgcc.symbols is in gcc-5-source 5.3.1-14ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | libgcc_s.so.1 #PACKAGE# #MINVER#
(symver)GCC_3.0 1:3.0
(symver)GCC_3.3 1:3.3
(symver)GCC_3.3.1 1:3.3.1
(symver|optional)GCC_3.3.2 1:3.3.2
(symver|optional)GCC_3.3.4 1:3.3.4
(symver)GCC_3.4 1:3.4
(symver)GCC_3.4.2 1:3.4.2
(symver|optional)GCC_3.4.4 1:3.4.4
(symver|arch=armel armhf|ignore-blacklist)GCC_3.5 1:3.5
(symver)GCC_4.0.0 1:4.0
(symver|optional)GCC_4.1.0 1:4.1
(symver)GCC_4.2.0 1:4.2
(symver)GCC_4.3.0 1:4.3
(symver|optional)GCC_4.4.0 1:4.4
(symver|optional)GCC_4.5.0 1:4.5
(symver|optional)GCC_4.6.0 1:4.6
(symver|optional)GCC_4.7.0 1:4.7
(symver|optional)GCC_4.8.0 1:4.8
(symver|optional)GLIBC_2.0 1:4.2
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