我有一个C应用程序,我正在尝试为Mac OS X 10.6.4编译:
$ uname -v
Darwin Kernel Version 10.4.0: Fri Apr 23 18:28:53 PDT 2010; root:xnu-1504.7.4~1/RELEASE_I386
我的gcc
版本如下:
$ gcc --version
i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5664)
我的 Makefile
如下所示:
CC=gcc
CFLAGS=-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -O3 -Wformat -Wall -pedantic -std=gnu99
all: myApp
rm -rf *~
myApp: myApp.o
${CC} ${CFLAGS} myApp.o -lbz2 -o myApp
rm -rf *~
clean:
rm -rf *.o myApp
问题在于我的应用程序调用了fseeko64
和fopen64
,并使用off64_t
类型进行偏移量。当我编译我的应用程序时,我会收到以下警告和错误:
$ make myApp
gcc -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -O3 -Wformat -Wall -pedantic -std=gnu99 -c -o myApp.o myApp.c
myApp.c: In function ‘extractData’:
myApp.c:119: warning: implicit declaration of function ‘fseeko64’
myApp.c:119: error: ‘off64_t’ undeclared (first use in this function)
myApp.c:119: error: (Each undeclared identifier is reported only once
myApp.c:119: error: for each function it appears in.)
myApp.c: In function ‘extractMetadata’:
myApp.c:305: warning: implicit declaration of function ‘fopen64’
myApp.c:305: warning: assignment makes pointer from integer without a cast
我的代码在Linux下构建没有错误。我在Darwin下构建时可以做哪些更改来添加大文件支持?