Unable to compile example with GCC compiler

I have a Keil application project created with ARMCC Compiler v5. I now wanted to migrate to GCC compiler. I followed the steps mentioned in https://developer.arm.com/documentation/101407/0542/Creating-Applications/Tips-and-Tricks/GNU-C-Compiler-Support. However, the code still does not compile and fails with below error:

The Folder path provided under Folders/Extensions is <internal directory>/arm-gnu-toolchain-14.2.rel1-mingw-w64-i686-arm-none-eabi\arm-none-eabi/bin/. Please help me out with the build error.

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