So I am trying to compile a c++ program and have the executable be 32-bit instead of 64-bit. The system (using a program to simulate a system) I want to run it on is 32-bit and seeing as compiling the program yields 64-bit ELF files I cannot run them. I have added the -m32 flag to the makefile and when compiling i get the following errors:
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/5/libstdc++.so when searching for -lstdc++ /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/5/libstdc++.a when searching for -lstdc++ /usr/bin/ld: cannot find -lstdc++
when using sudo apt install -lstdc++ it simply says it cannot find the library. Anybody perhaps able to give me some direction? I am running all of this using remote wsl in visual studio code on a windows 10 machine. Ultimately I just want the compiled executables from this program to be 32-bit ELFs instead of 64-bit.
This is the make file The program im trying to compile is a benchmark suite located here https://github.com/alifahmed/hopscotch . This is the makefile otherwise located in /cpu/2_bandwidth:
TARGET = bandwidth
.PHONY: all clean $(TARGET)
# directories
INC_DIR = ../include
KERN_DIR = ../kernels
CMN_DIR = ../common
OBJ_DIR = obj
# compiler flags ADDED -m32 FLAG
CXX = g++
CXXFLAGS = -m32 -O3 -fopenmp -march=native -I$(INC_DIR) -std=c++14 $(USER_DEFS)
# header files
HEADERS = $(wildcard $(INC_DIR)/*.h)
# src files
SRC = $(wildcard *.cpp) $(wildcard $(KERN_DIR)/*.cpp) $(wildcard $(CMN_DIR)/*.cpp)
# object files
OBJ = $(SRC:.cpp=.o)
all: $(TARGET)
clean:
@rm -rf $(OBJ)
@rm -rf $(TARGET)
@echo "Cleaned..."
%.o: %.cpp $(HEADERS)
$(CXX) $(CXXFLAGS) -c -o $@ $<
$(TARGET): $(OBJ)
$(CXX) $(CXXFLAGS) $^ -o $@```
That's easy, just install the 32-bit development libraries
$ sudo apt update
$ sudo apt install gcc-multilib g++-multilib
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