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Improve README explaining crosscompilation for windows from linux.

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Alejandro Cabeza Romero 2025-07-14 15:02:14 +02:00
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circom_circuits/Mantle/README.md
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@ -22,66 +22,81 @@
3. Replace the Makefile
The autogenerated `Makefile` does not support cross-compilation. Replace the `Makefile` contents with the following:
```make
# ========== General ==========
# ========== General ==========
DEPS_HPP = circom.hpp calcwit.hpp fr.hpp
DEPS_HPP = circom.hpp calcwit.hpp fr.hpp
# ========== Native Linux build ==========
CXX = g++
CXXFLAGS = -std=c++11 -O3 -I.
LDFLAGS = -lgmp
# ========== Native Linux build ==========
CXX = g++
CXXFLAGS = -std=c++11 -O3 -I.
LDFLAGS = -lgmp
OBJS = main.o calcwit.o fr.o pol.o
OBJS = main.o calcwit.o fr.o pol.o
all: pol
all: pol
%.o: %.cpp $(DEPS_HPP)
$(CXX) -Wno-address-of-packed-member -c $< $(CXXFLAGS)
%.o: %.cpp $(DEPS_HPP)
$(CXX) -Wno-address-of-packed-member -c $< $(CXXFLAGS)
pol: $(OBJS)
$(CXX) -o $@ $^ $(LDFLAGS)
pol: $(OBJS)
$(CXX) -o $@ $^ $(LDFLAGS)
# ========== Windows cross-compilation ==========
# ========== Windows cross-compilation ==========
CXX_WIN = x86_64-w64-mingw32-g++
CC_WIN = x86_64-w64-mingw32-gcc
CXXFLAGS_WIN = -std=c++11 -O3 -I. -Iinclude -Duint="unsigned int" -Ideps/mman-win32
LDFLAGS_WIN = -L/usr/x86_64-w64-mingw32/sys-root/mingw/lib -lgmp
CXX_WIN = x86_64-w64-mingw32-g++
CC_WIN = x86_64-w64-mingw32-gcc
CXXFLAGS_WIN = -std=c++11 -O3 -I. -Iinclude -Duint="unsigned int"
LDFLAGS_WIN = -Llib -lgmp -lmman
WIN_OBJS = main.win.o calcwit.win.o fr.win.o pol.win.o mman.win.o
WIN_OBJS = main.win.o calcwit.win.o fr.win.o pol.win.o mman.win.o
%.win.o: %.cpp $(DEPS_HPP)
$(CXX_WIN) -Wno-address-of-packed-member -c $< -o $@ $(CXXFLAGS_WIN)
%.win.o: %.cpp $(DEPS_HPP)
$(CXX_WIN) -Wno-address-of-packed-member -c $< -o $@ $(CXXFLAGS_WIN)
mman.win.o: deps/mman-win32/mman.c
$(CC_WIN) -c $< -o $@
mman.win.o: deps/mman-win32/mman.c
$(CC_WIN) -c $< -o $@
pol.exe: $(WIN_OBJS)
$(CXX_WIN) -o $@ $^ $(LDFLAGS_WIN)
pol.exe: $(WIN_OBJS)
$(CXX_WIN) -o $@ $^ $(LDFLAGS_WIN)
# ========== Cleanup ==========
# ========== Cleanup ==========
clean:
$(RM) *.o *.win.o pol pol.exe
clean:
$(RM) *.o *.win.o pol pol.exe
```
4. Install Dependencies
1. Cross-Compiler
```bash
sudo dnf install mingw64-gcc mingw64-gcc-c++ # Compiler
```
2. `sys/mman.h`
2. Directory structure
```bash
mkdir -p include/sys
mkdir -p deps
mkdir -p lib
```mkdir -p include/sys
mkdir -p deps
mkdir -p lib
3. `sys/mman.h`
```bash
git clone https://github.com/alitrack/mman-win32.git deps/mman-win32
cp deps/mman-win32/mman.h ./sys/
# cp deps/mman-win32/mman.h ./sys/
####
cd deps/mman-win32
./configure
make CC=x86_64-w64-mingw32-gcc
cd ../..
cp deps/mman-win32/mman.h include/sys/
cp deps/mman-win32/libmman.a lib
```
3. `nlohmann/json`
4. `nlohmann/json`
```bash
mkdir -p include/nlohmann
wget https://raw.githubusercontent.com/nlohmann/json/develop/single_include/nlohmann/json.hpp -O include/nlohmann/json.hpp
```
4. `gmp`
5. `gmp`
```
sudo dnf install mingw64-gmp
```
@ -92,11 +107,8 @@
6. Bundle
1. Copy `.dll`s
```bash
cp /usr/x86_64-w64-mingw32/sys-root/mingw/bin/libgcc_s_seh-1.dll \
/usr/x86_64-w64-mingw32/sys-root/mingw/bin/libgmp-10.dll \
/usr/x86_64-w64-mingw32/sys-root/mingw/bin/libwinpthread-1.dll \
/usr/x86_64-w64-mingw32/sys-root/mingw/bin/libstdc++-6.dll \
.
MINGW_DLL_DIR="$(x86_64-w64-mingw32-gcc -print-sysroot)/mingw/bin"
cp "$MINGW_DLL_DIR"/{libgcc_s_seh-1.dll,libgmp-10.dll,libwinpthread-1.dll,libstdc++-6.dll} .
```
2. Copy `.dat`
```