uda1341在2.6.27 2440

直接用的网上的patch，虽然patch的时候稍微有一点差别，造成*.orig, *.prej，但是改一下就好了，把patch地址给出来。连续4页

[PATCH RESEND 0/3] ALSA SOC driver for s3c24xx with uda134x

http://www.spinics.net/lists/arm-kernel/msg58298.html

http://www.spinics.net/lists/arm-kernel/msg58299.html

http://www.spinics.net/lists/arm-kernel/msg58300.html

http://www.spinics.net/lists/arm-kernel/msg58301.html

记录一下今天上午看的mmc代码(2.6.27)

S3C2440板子。先统计一下编译了哪些文件，分别是

card/
block.o queue.o
host/
s3cmci.o
core/
bus.o core.o host.o
及sd，mmc，sdio 3种规范的相关文件：
sd: sd.o sd_ops.o
mmc: mmc.o mmc_ops.o
sdio: sdio.o sdio_ops.o sdio_bus.o sdio_cis.o sdio_io.o sdio_irq.o

看别人写的抄下来的流程：
1. 内核启动initcall ==>> mmc_init() ==>> mmc_blk_init()
2. xx_mmc_probe 检测挂在的设备
3. 起延时任务mmc_rescan()对卡初始化
4. mmc_attach_sd(),mmc_attach_mmc(),mmc_attach_sdio()加载设备
5. mmc_add_card()

6.卡加入系统后，mmc_blk_probe()分配mmc_blk_data结构变量
7.mmc_init_queue()初始化
8.建立线程mmc_queue_thread(),接受块设备读写请求并处理

然后看代码把每个文件做的事写一下，有点乱
s3cmci.c
注册s3c2410,2412,2440平台驱动
mmc_alloc_host
硬件初始化，注册中断
mmc->ops = &s3cmci_ops 结构成员函数有request,set_ios,get_ro,get_cd
中断函数s3cmci_irq()完成读写，中断中起tasklet即pio_tasklet(),再区分为do_pio_read(),do_pio_write()

block.c
注册块设备，主设备号179，向mmc_driver注册驱动
mmc_blk_probe()==>>mmc_blk_alloc()==>>mmc_init_queue()在此函数中起线程.线程函数是queue.c中的mmc_queue_thread()
在 线程中根据blk_queue_plugged()判断队列是否有插入，取得elv_next_request()的返回值struct request*,调用mq->issue_fn函数即block.c的mmc_blk_issue_irq()处理，在 mmc_wait_for_req()函数种把请求传给host->ops->request，即s3cmci_ops中的request结 构成员函数

bus.c
struct mmc_card结构相关
提供函数alloc card()，add_card(), 在add_card()中调用device_add()添加设备
向系统注册总线mmc_bus_type
把block.c注册过来的mmc_driver注册为系统的驱动

core.c
mmc_rescan()分辨检测卡
mmc_init()起工作队列，初始检测及热插拔时detect用
调用注册总线，注册class

host.c
与s3cmci.c相关联的文件，找到设备前先假设有设备，mmc_alloc_host()起工作队列mmc_rescan()检测设备，未检测到释放host，检测到了调用device_add添加设备

只看mmc规范
mmc.c
mmc_rescan中找到卡后调用mmc_attach_mmc初始化卡，提供detect函数每次检测卡是否拔出

mmc_ops.c
mmc的具体命令,比如go_idle(),send_cid()等

分辨sdio，mmc，sd卡，通过发命令，具体命令我不确定
发送cmd5，如果有响应就是sdio，没响应就往下走
发送cmd1，如果有响应就是mmc，如果没响应就是sd

卡插入中断后的处理：
s3cmci,c中的s3cmci_irq_cd()==>>mmc_detect_change()==>>host->detect()==>>mmc_detect()
这里的s3cmci_irq_cd()是sd卡插入检测脚cd的中断处理函数

mmc/sd 在 2.6.27 2440

让板子能识别热插拔的卡。正好手上MMC卡和SD卡都有，能用

1. 先加上sdi的platform_device， s3c_device_sdi
arch/arm/mach-s3c2440/mach-smdk2440.c
static struct platform_device *smdk2440_devices[] __initdata = {
&s3c_device_usb,
&s3c_device_lcd,
&s3c_device_wdt,
&s3c_device_i2c,
&s3c_device_iis,
//zhourr
&s3c_device_adc,
&s3c_device_sdi,
};

2. 添加自己板子特别的地方，比如卡接的中断脚，卡插入检测脚，卡写保护脚，检测和写保护脚的极性，提供的sd卡电压范围
static struct s3c24xx_mci_pdata s3cmci_def_pdata = {
/* This is currently here to avoid a number of if (host->pdata)
* checks. Any zero fields to ensure reaonable defaults are picked. */
//zhourr
.wprotect_invert = 0,
.detect_invert = 0,
.gpio_detect = S3C2410_GPG8,
.gpio_wprotect = S3C2410_GPH8,
.ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34,
.set_power = NULL,
};

此时MMC卡已经可以热插拔，并在dev下找到mmcblk0

# ls -l /dev/mmc*
brw-rw---- 1 0 0 179, 0 Jan 1 00:03 /dev/mmcblk0

但是SD卡系统启动前正常，热插拔插入时会有timeout错误
错误1：
s3c2440-sdi s3c2440-sdi: mci_setup_data() transfer stillin progress.
s3c2440-sdi s3c2440-sdi: CMDSTAT: error CMDTIMEOUT
s3c2440-sdi s3c2440-sdi: CMD[ERR -110] #47 op:6 arg:0x00fffff1 flags:0x08b5 retries:0 Status:nothing to complete
s3c2440-sdi s3c2440-sdi: DAT[OK] #4 bsize:64 blocks:1 bytes:64
s3c2440-sdi s3c2440-sdi: powered down.
mmc0: error -110 whilst initialising SD card

错误2：
s3c2440-sdi s3c2440-sdi: unfinished read - pio_count:[0] pio_words:[16]
s3c2440-sdi s3c2440-sdi: CMD[OK] #68 op:6 arg:0x00fffff1 flags:0x08b5 retries:0 R0:0x00000900
s3c2440-sdi s3c2440-sdi: DAT[ERR -22] #6 bsize:64 blocks:1 bytes:64 DCNT:0x00000000
mmc0: problem reading switch capabilities, performance might suffer.

3.解决SD插入错误-->加延时
driver/mmc/core/sd.c 的mmc_sd_init_card()函数中mmc_read_switch前延时10ms

mdelay(10);

err = mmc_read_switch(card);

查看插入后的设备
# ls -l /dev/mmc*
brw-rw---- 1 0 0 179, 0 Jan 1 00:04 /dev/mmcblk0
brw-rw---- 1 0 0 179, 1 Jan 1 00:04 /dev/mmcblk0p1

mount后使用卡，可读写
# mount -t vfat /dev/mmcblk0p1 /opt/

写完后自己sync一下，确保写进去了，PC上就可以看到了


4.有个问题：
如果拔出太快又插入，现在会当作只拔出了。还不清楚MMC里怎么做的，要看一下了

cs8900在2440 linux2.6.27

driver/net/cs89x0.c

1.修改ioaddr和irq，接CS3，addr24选择io或memory方式，irq是EINT9，GPG1，写网卡MAC地址
#include "../../arch/arm/mach-s3c2410/include/mach/map.h"
#include "../../arch/arm/mach-s3c2410/include/mach/regs-mem.h"
#include "../../arch/arm/mach-s3c2410/include/mach/regs-gpio.h"
#include "../../arch/arm/mach-s3c2410/include/mach/regs-irq.h"
static unsigned int netcard_portlist[] __used __initdata = { S3C24XX_VA_CS8900_CS3 + 0x300, 0};
static unsigned int cs8900_irq_map[] = {IRQ_EINT9,0,0,0};

2.添加2440硬件初始化函数
static void cs89x0_hw_setup(struct net_device *dev)
{
unsigned int regval = 0;

//CS3, 16 bit bus width
__raw_writel(0x2211d110,S3C2410_BWSCON);
__raw_writel(0x1f7c,S3C2410_BANKCON3);

//EINT[9]
regval = __raw_readl(S3C2410_GPGCON);
regval &= ~(3<<2);
regval |= 2 <<2;
__raw_writel(regval, S3C2410_GPGCON);

//irq mode
regval = __raw_readl(S3C2410_EXTINT1);
regval &= ~(7<<4);
regval |= 4 <<4;
__raw_writel(regval, S3C2410_EXTINT1);

//irq MASK
regval = __raw_readl(S3C2410_EINTMASK);
regval &= ~(1<<9);
__raw_writel(regval, S3C2410_EINTMASK);

//mac addr
dev->dev_addr[0] = 0x00;
dev->dev_addr[1] = 0x00;
dev->dev_addr[2] = 0xc0;
dev->dev_addr[3] = 0xff;
dev->dev_addr[4] = 0xee;
dev->dev_addr[5] = 0x08;

printk("[cs89x0_probe] S3C2410_BWSCON = %x\r\n", __raw_readl(S3C2410_BWSCON));
printk("[cs89x0_probe] S3C2410_BANKCON3 = %x\r\n", __raw_readl(S3C2410_BANKCON3));
printk("[cs89x0_probe] S3C2410_GPGCON = %x\r\n", __raw_readl(S3C2410_GPGCON));
printk("[cs89x0_probe] S3C2410_EXTINT1 = %x\r\n", __raw_readl(S3C2410_EXTINT1));
printk("[cs89x0_probe] S3C2410_EINTMASK = %x\r\n", __raw_readl(S3C2410_EINTMASK));
printk("[cs89x0_probe] MAC ADDR: %x-%x-%x-%x-%x-%x\r\n",
dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);

}

3.在cs89x0_probe里调用cs89x0_hw_setup函数

cs89x0_hw_setup(dev);

if (net_debug)
printk("cs89x0:cs89x0_probe(0x%x)\n", io);

4.修改readword，writeword函数，portno不需要左移（我现在怎么看着不需要了啊，好像else里的也没有左移）

static u16
readword(unsigned long base_addr, int portno)
{
return __raw_readw(base_addr+portno);
}

static void
writeword(unsigned long base_addr, int portno,u16 value)
{
__raw_writew(value,base_addr+portno);
}

5.设置网口RJ45，省去boot启动时带参数
lp->force = g_cs89x0_media__force;
改成
lp->force=FORCE_RJ45;

6.注释掉irq_map的安全检查
#if 0
if (((1 <<>irq) & lp->irq_map) == 0) {
printk(KERN_ERR "%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
dev->name, dev->irq, lp->irq_map);
ret = -EAGAIN;
goto bad_out;
}
#endif

7.2440初始化时增加分配cs8900的io port，修改mach-smdk2440.c

static struct map_desc smdk2440_iodesc[] __initdata = {
/* ISA IO Space map (memory space selected by A24) */

{
.virtual = (u32)S3C24XX_VA_ISA_WORD,
.pfn = __phys_to_pfn(S3C2410_CS2),
.length = 0x10000,
.type = MT_DEVICE,
}, {
.virtual = (u32)S3C24XX_VA_ISA_WORD + 0x10000,
.pfn = __phys_to_pfn(S3C2410_CS2 + (1<<24)),
.length = SZ_4M,
.type = MT_DEVICE,
}, {
.virtual = (u32)S3C24XX_VA_ISA_BYTE,
.pfn = __phys_to_pfn(S3C2410_CS2),
.length = 0x10000,
.type = MT_DEVICE,
}, {
.virtual = (u32)S3C24XX_VA_ISA_BYTE + 0x10000,
.pfn = __phys_to_pfn(S3C2410_CS2 + (1<<24)),
.length = SZ_4M,
.type = MT_DEVICE,
}, { //zhourr
.virtual = (u32)S3C24XX_VA_CS8900_CS3,
.pfn = __phys_to_pfn(S3C2410_CS3 + (1<<24)),
.length = SZ_1M,
.type = MT_DEVICE,
}
};

8.在arch/arm/mach-s3c2410/include/mach/map.h增加宏定义,跟别的不冲突就行了
#define S3C24XX_VA_CS8900_CS3 S3C2410_ADDR(0x04000000)

sh下运行#!/bin/bash开头的脚本会返回not found

inittab脚本：
::sysinit:/etc/rc.sysinit
::respawn:-/bin/sh
::once:/bin/mount -a
::restart:/sbin/init
::ctrlaltdel:/sbin/reboot
::shutdown:/bin/umount -a -r
::shutdown

我在/etc/inittab里想执行/etc/rc.sysinit脚本失败，提示是：
cannot run '/etc/rc.sysinit': No such file or directory

单独在sh里敲提示not found
# /etc/rc.sysinit
-/bin/sh: /etc/rc.sysinit: not found

但是source就可以执行
# source /etc/rc.sysinit
starting udevd...

我以为是没有执行属性，还是不行
chmod 777 /etc/rc.sysinit

网上说sh /etc/rc.sysinit，我就改inittab第一行为：
::sysinit:/bin/sh /etc/rc.sysinit
这样脚本就可以执行了，

但是脚本里udevd失败，报错：
starting udevd...
udevd[824]: main: error disabling OOM: No such file or directory

后来发现我的rc.sysinit脚本前用的是#!/bin/bash，改为#!/bin/sh,又把inittab第一行恢复原样
这样rc.sysinit就可以找到并执行了

但是udevd还是报错，根据启动打印sysinit第一个执行，我想把它放到mount -a的后面，于是把第一行放到了第三行后面
::respawn:-/bin/sh
::once:/bin/mount -a
::sysinit:/etc/rc.sysinit
::restart:/sbin/init
::ctrlaltdel:/sbin/reboot
::shutdown:/bin/umount -a -r
::shutdown
但是它还是第一个执行

我猜是::sysinit:使它第一个执行的，改为::once:
udevd就好了

2440 2.6.27启动后主频405Mhz却打印出来是571Mhz

2.6.27
网上有人一样是启动时乱码，他说修改时钟频率为12M就可以了，我的板子本来就是12M晶振
我是临时通过屏蔽内核串口设置来去掉乱码的，下面有正确做法
drivers/serial/samsung.c中8个wr_regl 函数屏蔽掉
core 571.536 MHz，确实是主时钟错了，有点离谱，bootloader里的时钟是405M，启动后不修改uart设置，能正常显示打印，说明这时时钟还是405MHZ。虽然是主频导致uart计算波特率的divider出错导致的乱码，但是为什么会到571Mhz呢？

这样我启动后看到的打印是：
enter Main
cp15 register 1 = c000107c
************************************
* *
* 2440 bootloader *
* Nov 17 2008,11:22:08 *
* *
************************************
Read chip id = ec76
Nand flash status = c0
NAND_Read addr : 40000, size : 1c0000
................................................................................................................Uncompressing Linux.................................................................................................................. done, booting the kernel.
Linux version 2.6.27 (root@sherman_samba) (gcc version 3.4.1) #4 Tue Nov 18 11:51:27 CST 2008
CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177
Machine: SMDK2440
ATAG_INITRD is deprecated; please update your bootloader.
Memory policy: ECC disabled, Data cache writeback
CPU S3C2440A (id 0x32440001)
S3C244X: core 571.536 MHz, memory 142.884 MHz, peripheral 71.442 MHz
S3C24XX Clocks, (c) 2004 Simtec Electronics
CLOCK: Slow mode (2.116 MHz), fast, MPLL on, UPLL on
CPU0: D VIVT write-back cache
CPU0: I cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets
CPU0: D cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16256
Kernel command line: noinitrd root=/dev/mtdblock2 init=/linuxrc console=ttySAC0,115200
irq: clearing subpending status 00000092
PID hash table entries: 256 (order: 8, 1024 bytes)
timer tcon=00000000, tcnt e88e, tcfg 00000200,00000000, usec 00001580
Console: colour dummy device 80x30
console [ttySAC0] enabled
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 64MB = 64MB total
Memory: 61120KB available (3256K code, 322K data, 144K init)
Calibrating delay loop... 285.08 BogoMIPS (lpj=712704)
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
net_namespace: 440 bytes
NET: Registered protocol family 16
S3C2410 Power Management, (c) 2004 Simtec Electronics
S3C2440: Initialising architecture
S3C2440: IRQ Support
S3C24XX DMA Driver, (c) 2003-2004,2006 Simtec Electronics
DMA channel 0 at c4800000, irq 33
DMA channel 1 at c4800040, irq 34
DMA channel 2 at c4800080, irq 35
DMA channel 3 at c48000c0, irq 36
S3C244X: Clock Support, DVS off
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
NET: Registered protocol family 2
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
TCP established hash table entries: 2048 (order: 2, 16384 bytes)
TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
TCP: Hash tables configured (established 2048 bind 2048)
TCP reno registered
NET: Registered protocol family 1
NetWinder Floating Point Emulator V0.97 (extended precision)
JFFS2 version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc.
msgmni has been set to 119
io scheduler noop registered
io scheduler anticipatory registered (default)
io scheduler deadline registered
io scheduler cfq registered
Console: switching to colour frame buffer device 30x40
fb0: s3c2410fb frame buffer device
lp: driver loaded but no devices found
ppdev: user-space parallel port driver
Serial: 8250/16550 driver4 ports, IRQ sharing enabled
s3c2440-uart.0: s3c2410_serial0 at MMIO 0x50000000 (irq = 70) is a S3C2440
s3c2440-uart.1: s3c2410_serial1 at MMIO 0x50004000 (irq = 73) is a S3C2440
s3c2440-uart.2: s3c2410_serial2 at MMIO 0x50008000 (irq = 76) is a S3C2440
brd: module loaded
loop: module loaded
dm9000 Ethernet Driver, V1.31
Uniform Multi-Platform E-IDE driver
Driver 'sd' needs updating - please use bus_type methods
S3C24XX NAND Driver, (c) 2004 Simtec Electronics
60 ns is too big for current clock rate 142884
s3c2440-nand s3c2440-nand: cannot get suitable timings
s3c2440-nand: probe of s3c2440-nand failed with error -22
usbmon: debugfs is not available
s3c2410-ohci s3c2410-ohci: S3C24XX OHCI
s3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1
s3c2410-ohci s3c2410-ohci: irq 42, io mem 0x49000000
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
usbcore: registered new interface driver libusual
usbcore: registered new interface driver usbserial
usbserial: USB Serial support registered for generic
usbcore: registered new interface driver usbserial_generic
usbserial: USB Serial Driver core
usbserial: USB Serial support registered for FTDI USB Serial Device
usbcore: registered new interface driver ftdi_sio
ftdi_sio: v1.4.3:USB FTDI Serial Converters Driver
usbserial: USB Serial support registered for pl2303
usbcore: registered new interface driver pl2303
pl2303: Prolific PL2303 USB to serial adaptor driver
mice: PS/2 mouse device common for all mice
S3C24XX RTC, (c) 2004,2006 Simtec Electronics
s3c2440-i2c s3c2440-i2c: slave address 0x10
s3c2440-i2c s3c2440-i2c: bus frequency set to 372 KHz
s3c2440-i2c s3c2440-i2c: i2c-0: S3C I2C adapter
S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics
s3c2410-wdt s3c2410-wdt: watchdog inactive, reset disabled, irq enabled
TCP cubic registered
NET: Registered protocol family 17
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
Root-NFS: No NFS server available, giving up.
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "mtdblock2" or unknown-block(2,0)
Please append a correct "root=" boot option; here are the available partitions:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
========================
时钟不对，连nand都不能正常操作
------->>>>
s3c244x.c s3c244x_init_clocks
------->>>>
cpu.c static struct cpu_table cpu_ids[] __initdata
------->>>>
cpu.c s3c24xx_init_clocks
------->>>>
mach-smdk2440.c smdk2440_map_io
该函数中带了时钟输入参数
s3c24xx_init_clocks(16934400);
因为我们用的晶振是12M的，所以需要改成下面这样
s3c24xx_init_clocks(12000000);

这样串口也正常了，时钟也对了，nand也对了

动态中断向量

ResetEntry
b ResetHandler
b Undefined_Handler
b SWI_Handler
b Prefetch_Handler
b Abort_Handler
nop
ldr pc, =0x300ffffc
b FIQ_Handler

//0x18 = jump to 0x300ffffc
//0x300ffffc = jump to IsrHandler
//b arm, ea000006 = 6 <<2 +8 + pc
//b code, (dst - src -8) >>2 +0xea000000
void RegInterrupteHandlerTable(void)
{
unsigned long dest_addr = (unsigned long)IsrHandler;
unsigned long offset_addr ;
unsigned long *pIrqHandler = (unsigned long *)0x300ffffc;

offset_addr = (((dest_addr - (unsigned long)pIrqHandler - 8)) >> 2)&0xffffff;

*pIrqHandler = 0xea000000+offset_addr;
}

以前把整个表做重新做动态了，没必要，现在就修改irq这一条，而且思路比以前清晰

0x18地址存放的指令是 pc=0x300ffffc
0x300ffffc地址存放的指令是 b IsrHandler，是做出来的指令

拿一般第一条指令的机器码来说，一般是b resethandler
0地址机器码 ：0xea000006
resethandler函数地址 0x20

0 + 6 << 2 +8 = 0x20,这样就会跳转到resethandler函数的地址了

-/bin/sh: XXX: not found

# ./qpe
-/bin/sh: ./qpe: not found

shell找不到该文件，及刚启动完打印的找不到/etc/rc.sysinit文件同样的现象

网上有人说是busybox静态编译改成动态编译就可以了，我改了，真的可以了
库文件当然用的是编译器里的*.so文件拷贝到根文件系统/lib下

在Fedora7上编译qtopia-2.2.0 x86版

1>下载gcc32编译器
http://d.download.csdn.net/down/382229/morre
compat-gcc-32-3.2.3-47.3.i386.rpm

http://d.download.csdn.net/down/382235/morre
compat-gcc-32-c++-3.2.3-47.3.i386.rpm

当时没有用rpm命令行安装，是firefox下载后点“打开”，弹出更新软件，点“应用”这样装的
应该怎么安装都行吧。安装完后，出现/usr/bin/gcc32等。有人说改Makefile或设置CC环境变量，我觉得可能会改不全，所以换gcc，下面这样改不确定对不对，不过以前gcc4.1.2编不过的现在可以编过了

//替换gcc
mv /usr/bin/gcc /usr/bin/gccbak
mv /usr/bin/gcc32 /usr/bin/gcc

//替换g++
mv /usr/bin/g++ /usr/bin/g++bak
mv /usr/bin/g++32 /usr/bin/g++

//替换libc
cp /usr/lib/gcc/i386-redhat-linux/4.1.2 /usr/lib/gcc/i386-redhat-linux/4.1.2bak -rf
cp /usr/lib/gcc-lib/i386-redhat-linux/3.2.3 /* /usr/lib/gcc/i386-redhat-linux/4.1.2/ -rf

2>下载freetype2.1.10
http://download.chinaunix.net/download.php?id=6228&ResourceID=3295
freetype-2.1.10.tar.bz2

解压后
./configure --prefix=/usr
make
make install
mv /usr/freetype2/freetype /usr/freetype2/freetypebak //不用以前的freetype 头文件
cp freetype-2.1.10/include/freetype /usr/freetype2/ -rf //既然只是新的头文件，那么是不是不用编译呢？

3>编译qtopia-2.2.0
./configure
make
make install

4>跑demo
. setQpeEnv
qtopia/bin/startdemo

删除libstdc++后缺少libstdc++.so.6库导致很多命令执行不了

fedora7想把gcc4.1.2替换成gcc3.2.2, 所以下载了cpp-3.2.2-5.i386.rpm, gcc-3.2.2-5.i386.rpm等包，但在安装时提示已经有更新的版本，所以先删除新版本再装旧版本，更换cpp和gcc时未出问题，更换libstdc++出问题了
rpm -e --nodeps libstdc++-4.1.2-12
rpm: error while loading shared libraries: libstdc++.so.6: cannot open shared object file: No such file or directory

rpm -ivh libstdc++-4.1.2-12.i386.rpm
即使再执行rpm把libstdc++安装回来也不行, 因为rpm命令本身需要libstdc++.so.6库, 我有libstdc++.so.5, ln -s不可行。yum install也不能执行了

所以我到另一台机子考了一个libstdc++.so.6过来，放到/usr/lib/下，至少rpm，yum之类的可以用了，再看怎么换gcc，那台考libstdc++.so.6的机子少另一个gcc库，进不了X，都是被我换gcc搞的