二、在sqlite下增加Makefile文件
在sqlite目录下应该没有Makefile文件，而只是有一个sqlite/Makefile.linux-gcc文件。我们要移植sqlite到uclinux，那么就要自己写一个合适的Makefile。
内容如下：
===========Makefile内容开始===========
#!/usr/make
#
# Makefile for SQLITE
#
# This is a template makefile for SQLite. Most people prefer to
# use the autoconf generated "configure" script to generate the
# makefile automatically. But that does not work for everybody
# and in every situation. If you are having problems with the
# "configure" script, you might want to try this makefile as an
# alternative. Create a copy of this file, edit the parameters
# below and type "make".
#
#### The toplevel directory of the source tree. This is the directory
# that contains this "Makefile.in" and the "configure.in" script.
#
TOP = .
#### C Compiler and options for use in building executables that
# will run on the platform that is doing the build.
#
BCC = gcc -g -O2
#BCC = /opt/ancic/bin/c89 -0
#### If the target operating system supports the "usleep()" system
# call, then define the HAVE_USLEEP macro for all C modules.
#
#USLEEP =
USLEEP = -DHAVE_USLEEP=1
#### If you want the SQLite library to be safe for use within a
# multi-threaded program, then define the following macro
# appropriately:
#
#THREADSAFE = -DTHREADSAFE=1
THREADSAFE = -DTHREADSAFE=0
#### Specify any extra linker options needed to make the library
# thread safe
#
#THREADLIB = -lpthread
THREADLIB =
#### Leave MEMORY_DEBUG undefined for maximum speed. Use MEMORY_DEBUG=1
# to check for memory leaks. Use MEMORY_DEBUG=2 to print a log of all
# malloc()s and free()s in order to track down memory leaks.
#
# SQLite uses some expensive assert() statements in the inner loop.
# You can make the library go almost twice as fast if you compile
# with -DNDEBUG=1
#
#OPTS = -DMEMORY_DEBUG=2
#OPTS = -DMEMORY_DEBUG=1
#OPTS = -DNDEBUG=1
OPTS = -DMEMORY_DEBUG=1
#### The suffix to add to executable files. ".exe" for windows.
# Nothing for unix.
#
#EXE = .exe
EXE =
#### C Compile and options for use in building executables that
# will run on the target platform. This is usually the same
# as BCC, unless you are cross-compiling.
#
TCC = $(CROSS)gcc
FLTFLAGS += -s 12000
#TCC = gcc -g -O0 -Wall
#TCC = gcc -g -O0 -Wall -fprofile-arcs -ftest-coverage
#TCC = /opt/mingw/bin/i386-mingw32-gcc -O6
#TCC = /opt/ansic/bin/c89 -O +z -Wl,-a,archive
#### Tools used to build a static library.
#
AR = $(CROSS)ar cr
#AR = /opt/mingw/bin/i386-mingw32-ar cr
RANLIB = $(CROSS)ranlib
#RANLIB = /opt/mingw/bin/i386-mingw32-ranlib
#### Extra compiler options needed for programs that use the TCL library.
#
#TCL_FLAGS =
#TCL_FLAGS = -DSTATIC_BUILD=1
#TCL_FLAGS = -I/home/drh/tcltk/8.4linux
#TCL_FLAGS = -I/home/drh/tcltk/8.4win -DSTATIC_BUILD=1
#TCL_FLAGS = -I/home/drh/tcltk/8.3hpux
#### Linker options needed to link against the TCL library.
#
#LIBTCL = -ltcl -lm -ldl
#LIBTCL = /home/drh/tcltk/8.4linux/libtcl8.4g.a -lm -ldl
#LIBTCL = /home/drh/tcltk/8.4win/libtcl84s.a -lmsvcrt
#LIBTCL = /home/drh/tcltk/8.3hpux/libtcl8.3.a -ldld -lm -lc
#### Compiler options needed for programs that use the readline() library.
#
READLINE_FLAGS =
#READLINE_FLAGS = -DHAVE_READLINE=1 -I/usr/include/readline
#### Linker options needed by programs using readline() must link against.
#
#LIBREADLINE =
#LIBREADLINE = -static -lreadline -ltermcap
#### Should the database engine assume text is coded as UTF-8 or iso8859?
#
# ENCODING = UTF8
ENCODING = ISO8859
# You should not have to change anything below this line
###############################################################################
include $(TOP)/main.mk
===========Makefile内容结束=========== |
注：
1、 在uclinux下的sqlite的Makefile将不去用到TCL相关的库。
2、 在uclinux下的sqlite的Makefile将不去用到readline()。
在sqlite/README中有关于Makefile的一段描述：
| The configure script uses autoconf 2.50 and libtool. If the configure script does not work out for you, there is a generic makefile named "Makefile.linux-gcc" in the top directory of the source tree that you can copy and edit to suite your needs. Comments on the generic makefile show what changes are needed. |
你可以用sqlite/Makefile.linux-gcc作为蓝本来修改适合你自己的Makefile。
你如果有兴趣的话，可以把上面的Makefile的内容和sqlite/Makefile.linux-gcc内容diff对比一下，看看uclinux下的sqlite编译有哪些不同的地方。
三、修改sqlite/src/os.c
如果你的sqlite包中包括os.c文件那么就对其进行修改，没有os.c文件可能是你的sqlite版本比较新，那么无须修改。
将所有你找到的：
用：
| if( s!=0 && errno != ENOSYS ) |
替换。
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