Hi, We are building the linux and windows toolchain configured with "--enable-lto" option. There were no problems while building linux toolchain. However, we are facing the following error while building windows toolchain on mingw environment. ===================== Error Encountered============================ checking libelf.h usability... no checking libelf.h presence... no checking for libelf.h... no checking gelf.h usability... no checking gelf.h presence... no checking for gelf.h... no checking libelf/libelf.h usability... no checking libelf/libelf.h presence... no checking for libelf/libelf.h... no checking libelf/gelf.h usability... no checking libelf/gelf.h presence... no checking for libelf/gelf.h... no configure: error: LTO support requires libelf.h or libelf/libelf.h. ===================== Error Encountered============================ We could not get any useful information to solve the above problem. Can anyone please help us to solve the issue? Thanks & Regards, Naveen