36 lines
1.2 KiB
Python
36 lines
1.2 KiB
Python
#
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# SCons Largefile enablement
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#
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# Version 1.4
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# 08-Jul-2024
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#
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def enableLargeFiles(check,conf):
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"""Tries to enable 64-bit off_t on linux platform"""
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fseeko=conf.CheckFunc('fseeko')
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if fseeko:
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conf.env.Append(CPPFLAGS = '-DHAVE_FSEEKO')
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offt=conf.CheckTypeSize('off_t','#include <stdio.h>\n#include <sys/types.h>')
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ulong=conf.CheckTypeSize('unsigned long')
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if fseeko and offt<8 and offt>0:
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# we have off_t but its not 8 byte long
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saved_flags=conf.env.Dictionary()['CPPFLAGS']
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# we try to use some defs to make off_t longer
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conf.env.Append(CPPFLAGS='-D_FILE_OFFSET_BITS=64')
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offt=conf.CheckTypeSize('off_t','#include <stdio.h>\n#include <sys/types.h>')
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if offt < 8:
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env.Replace(CPPFLAGS=saved_flags)
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if not fseeko:
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# no fseeko we do not need off_t for anything
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offt = 0
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check.Message("Checking for effective size of off_t ... ")
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check.Result(str(offt)+" bytes")
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conf.env.Append(CPPFLAGS = '-DSIZEOF_OFF_T='+str(offt))
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check.Message("Checking if we have native large files ... ")
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if fseeko and int(offt)>=8 and int(ulong)>=8:
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conf.env.Append(CPPFLAGS = '-DNATIVE_LARGEFILES')
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rc=True
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else:
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rc=False
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check.Result(rc)
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