Adding large file support
Adding large file support
- Subject: Adding large file support
- From: Alex Reynolds <email@hidden>
- Date: Sat, 23 Oct 2010 03:28:05 -0700
I have a C application I am trying to compile under Mac OS X 10.6.4, which includes large file support. The application builds correctly under Linux.
Here is the Darwin kernel I am using:
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$ uname -v
Darwin Kernel Version 10.4.0: Fri Apr 23 18:28:53 PDT 2010; root:xnu-1504.7.4~1/RELEASE_I386
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My gcc installation is as follows:
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$ gcc --version
i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5664)
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My Makefile is as follows:
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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} ${CFLAGS} myApp.o -lbz2 -o myApp
rm -rf *~
clean:
rm -rf *.o myApp
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The issue is that my application makes calls to "fseeko64" and "fopen64", and it uses the "off64_t" type for offsets. When I attempt to build, I get the following related warnings and errors:
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$ 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
-------------------------
My code builds without errors under Linux. What changes can I make to the source code to add large file support when building under Darwin?
Thanks for your advice.
Regards,
Alex _______________________________________________
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