it is usefull

[newjcj]

          There is an very easy way to build on windows using mingw32 compilation in msys2.

1. Download msys2-x86_64-20230318 from https://www.msys2.org/
2. Open the file click next, next, wait for install to complete, then press finish
3. Run C:\msys64\mingw64.exe
4. Write the commands to install the appropriate files:
   pacman -S git
   pacman -S mingw-w64-x86_64-gcc
   pacman -S make
5. Clone library for POSIX functions that llama.cpp needs:
   git clone https://github.com/CoderRC/libmingw32_extended.git
   cd libmingw32_extended
6. Build the library:
   mkdir build
   cd build
   ../configure
   make
7. Install the library:
   make install
8. Change directory:
   cd ~
9. Clone llama.cpp:
   git clone https://github.com/ggerganov/llama.cpp
   cd llama.cpp
10. Build llama.cpp:
    make LDFLAGS='-D_POSIX_MAPPED_FILES -lmingw32_extended' CFLAGS='-D_POSIX_MAPPED_FILES -I. -O3 -DNDEBUG -std=c11 -fPIC -Wall -Wextra -Wpedantic -Wcast-qual -Wdouble-promotion -Wshadow -Wstrict-prototypes -Wpointer-arith -Wno-unused-function -mfma -mf16c -mavx -mavx2' CXXFLAGS='-D_POSIX_MAPPED_FILES -I. -I./examples -O3 -DNDEBUG -std=c++11 -fPIC -Wall -Wextra -Wpedantic -Wcast-qual -Wno-unused-function'

Originally posted by @CoderRC in #103 (comment)

every thing is right but the last make is waring and i solved it to pacman install cmake and use cmake -S . -B build/ -D CMAKE_BUILD_TYPE=Release then make success! congratual

[SlyEcho]

It seems way too complex. Why is libmingw32_extended needed? It seems to be building fine with MSYS2 UCRT64 libc and CMake.

[CoderRC]

libmingw32_extended is needed because the POSIX translation code for windows will be outdated in llama.cpp eventually, and right now there is a warning when compiling #pragma message("warning: You are building for pre-Windows 8; prefetch not supported") which libmingw32_extended has better code for prefetching and llama.cpp absolutely does not for pre-Windows 8. libmingw32_extended also contains code that can be used in llama.cpp in the future.

[SlyEcho]

There is no warning for UCRT64, only Mingw64.

[github-actions]

This issue was closed because it has been inactive for 14 days since being marked as stale.