1、安装GCC:
(1)我安装的是gcc
4.3.1,首先安装gmp-4.2.2和mpfr-2.3.1,mpfr带一个patch,这些东东是干什么用的我也不清楚;
(2)因为我的gmp和mpfr都是安装在/usr/include下,所以configure时不需要指定--with-mpfr=mpfr目录--with-gmp=gmp目录。运行configure --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-c99 --enable-long-long --enable-clocale=gnu --disable-libstdcxx-pch --disable-multilib。使用这个配置成功make之前的一些方案都没有成功,在这里没有指定--enable-languages表明支持所有的语言。
(3)使用gcc main.m可以编译下面的程序了
#import
int main(int argc, char**argv)
{
printf("headfile dir is ok\n");
return 0;
}
(4)刚高兴一下,编译下面的程序发现很多错误,上网一查,发现原来要使用:
Gcc main.m –l objc
实在是不容易啊。。。
错误:
tmp/ccW8mREn.o: In function `main':
test.m:(.text+0x5e): undefined reference to `objc_get_class'
test.m:(.text+0x71): undefined reference to `objc_msg_lookup'
test.m:(.text+0x98): undefined reference to `objc_msg_lookup'
test.m:(.text+0xc4): undefined reference to `objc_msg_lookup'
test.m:(.text+0xf0): undefined reference to `objc_msg_lookup'
test.m:(.text+0x114): undefined reference to `objc_msg_lookup'
/tmp/ccW8mREn.o: In function `__objc_gnu_init':
test.m:(.text+0x145): undefined reference to `__objc_exec_class'
/tmp/ccW8mREn.o:(.data+0x
1a8): undefined reference to `__objc_class_name_Object'
collect2: ld returned 1 exit status
源代码:
#import
#import
// ----- @interface section ------
@interface Fraction:Object
{
int numerator;
int denominator;
}
-(void) Print;
-(void) SetNumerator:(int) n;
-(void) SetDenominator:(int) d;
@end
// @implementation section
@implementation Fraction;
-(void)Print
{
printf("Fraction:%i/%i\n", numerator, denominator);
}
-(void) SetNumerator:(int) n
{
numerator = n;
}
-(void) SetDenominator:(int) d
{
denominator = d;
}
@end
int main(int argc, const char *argv[] )
{
Fraction* myFraction;
myFraction = [Fraction new];
[myFraction SetNumerator:1];
[myFraction SetDenominator:3];
[myFraction Print];
[myFraction free];
return 0;
}
2、安装GNU-Step
(1)安装ffcall-1.10
(2)安装tiff_
3.8.2
(3)安装gnustep-make-
2.0.6并且在.bashrc中加入
GNUSTEP_ROOT=/usr/GNUstep
export GNUSTEP_ROOT
source /usr/GNUstep/System/Library/Makefiles/GNUstep.sh
(4)重新运行终端,再安装gnustep-base-