Sqlite3的應用
軟件環境
● PC：Fedora9
● 開發板：YC2440
● 交叉編譯器：arm-linux-gcc 3.3.2
● 數據庫：sqlite3.2.7
● 源碼：http://download.csdn.net/source/2984671
我已經上傳了PC下基於sqlite3的“增刪改查”的代碼。所以對編譯和應用不再贅述。
在這裏我將花更多的時間描述一下交叉編譯過程中出現的問題、原因以及解決辦法。
問題1：
系統提示：legacy.o(.text+0x340): undefined reference to `__ctype_b_loc'
系統提示：
/usr/local/arm/4.0.0/usr/bin/../lib/gcc/arm-linux/4.0.0/../../../../arm-linux/bin/ld:
crt1.o: No such file: No such file or directory
系統提示：arm_v5t_le-gcc-ld: ERROR: Source object /libsqlite3.a(set.o) has EABI version 0, but target test has EABI version 5
原因/辦法：
交叉編譯後，系統做上述提示，如果已經排除了常規原因（缺少某些庫等），就應該考慮交叉編譯器的版本問題了。
問題2：
系統提示：
arm-linux-gcc -static -g -o all.cgi all.c -L ./lib -lsqlite3 -I ./Include
/usr/local/arm/3.3.2/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld: skipping incompatible ./lib/libsqlite3.a when searching for -lsqlite3
/usr/local/arm/3.3.2/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld: cannot find -lsqlite3
collect2: ld returned 1 exit status
原因/辦法：
交叉編譯環境arm-linux-gcc編譯鏈接的libsqlite3.a庫不是使用arm-linux-gcc編譯獲得的，而是使用gcc編譯所得。
同樣道理，如果使用gcc編譯鏈接的是由arm-linux-gcc編譯所得的libsqlite3.a庫也會出現類似問題。
問題3：
下載到開發板後，執行程序，提示無法打開數據庫。
原因/辦法：
權限問題，可以將test.db所在目錄到根目錄權限全部放開。
Sqlite3 Application
Software Environment
● PC: Fedora9
● Development Board: YC2440
● cross-compiler: arm-linux-gcc 3.3.2
● Database: sqlite3.2.7
I have uploaded sqlite3's "add delete update select" code base on PC. So the compiler and applications will not be repeated.
Here I will spend more time describing some problems, causes and solutions what occurred during cross-compilation.
Question 1:
System warning: legacy.o (. Text +0 x340): undefined reference to `__ctype_b_loc '
System warning:
/Usr/local/arm/4.0.0/usr/bin/../lib/gcc/arm-linux/4.0.0/../../../../arm-linux/bin/ld:
crt1.o: No such file: No such file or directory
System warning: arm_v5t_le-gcc-ld: ERROR: Source object / libsqlite3.a (set.o) has EABI version 0, but target test has EABI version 5
Reasons/ways:
After cross compiling, the system shows the above tips, if you have ruled out the conventional reasons (lack of some libraries, etc.), you should consider that the cross-compiler version is inappropriate.
Question 2:
System warning:
arm-linux-gcc-static-g-o all.cgi all.c -L ./lib-lsqlite3 -I ./Include
/Usr/local/arm/3.3.2/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld: skipping incompatible ./Lib/libsqlite3.a when searching for-lsqlite3
/Usr/local/arm/3.3.2/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld: cannot find-lsqlite3
collect2: ld returned 1 exit status
Reasons/ways:
Cross-compiler arm-linux-gcc linked libsqlite3.a not using arm-linux-gcc compiler to build, but useing gcc compiler.
Similarly, if using gcc to link libsqlite3.a by the arm-linux-gcc compiler, the problems will also appear.
Question 3:
Downloaded to the development board, excuting the programmes, system warning that not open the database.
Reasons/ways:
Permissions problem, you can assign permission for all directorys from test.db directory to the root directory.
