arm-cortex A9調用lua 解釋器

1.編譯lua-3.3.5

下載lua源文件：

curl -R -O http://www.lua.org/ftp/lua-5.3.5.tar.gz

修改 src/Makefile

PLAT= none
改爲：
PLAT= linux

CC= gcc -std=gnu99
改爲：
CC= /opt/Xilinx/SDK/2018.3/gnu/aarch32/lin/gcc-arm-linux-gnueabi/bin/arm-linux-gnueabihf-gcc     (根據實際交叉編譯器位置，作相應更改)

AR= ar rcu
改爲：
AR= /opt/Xilinx/SDK/2018.3/gnu/aarch32/lin/gcc-arm-linux-gnueabi/bin/arm-linux-gnueabihf-ar rcu

RANLIB= ranlib
改爲：
RANLIB= /opt/Xilinx/SDK/2018.3/gnu/aarch32/lin/gcc-arm-linux-gnueabi/bin/arm-linux-gnueabihf-ranlib

linux:
	$(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_LINUX" SYSLIBS="-Wl,-E -ldl -lreadline"
改爲：
linux:
	$(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_LINUX" SYSLIBS="-Wl,-E -ldl"

編譯源碼：

cd lua-5.3.5/src
make
在src目錄會生成
liblua.a:lua靜態鏈接庫
lua程序:lua解釋器
luac程序:luac是將lua的程序文件編譯成二進制文件的工具

2.使用lua靜態庫

配置QT交叉編譯環境後，新建工程：lua_qttest.

.pro文件如下：

QT += core
QT -= gui

CONFIG += c++11

TARGET = lua_qttest
CONFIG += console
CONFIG -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0



unix:!macx: LIBS += -L$$PWD/lib/ -llua

INCLUDEPATH += $$PWD/include
DEPENDPATH += $$PWD/include

HEADERS += \
    include/lua.hpp

LIBS += -ldl
DESTDIR += $$PWD/bin
#unix:!macx: PRE_TARGETDEPS += $$PWD/lib/liblua.a

qt編譯會出現 [undefined reference to symbol ‘dlsym@@GLIBC_2.4’]，在.pro中其中添加LIBS += -ldl

編寫程序

main.cpp文件：

#include <QCoreApplication>
#include <iostream>
#include <stdio.h>
#include <lua.hpp>
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    printf("I am QT5.7\n");
    lua_State *L;
    L = luaL_newstate();
    if(L == NULL){
        printf("luaL_newstate failed\n");
        return a.exec();
    }
    /*load Lua base libraries*/
    luaL_openlibs(L);

    if(luaL_dofile(L,"bin/cal.lua")){
            const char *error = lua_tostring(L, -1);
            std::cout << error <<std::endl;
            return false;
       }

    lua_close(L);
    printf("luaL_newstate OK\n");
    return a.exec();
}

cal.lua:打印0-100之間的偶數

print("print even numbers between 0 to 100\n")

for i = 0,100,1 do
	if i%2 == 0 then
		print(i,"\n")
	end
end

3.開發板運行

將 bin include lib lua_qttest 文件夾拷貝到開發板上

運行如下：