Bug 85955

Summary: undefined flag for mremap(2) in sys/mman.h
Product: [Retired] Red Hat Linux Reporter: Daniel J Blueman <daniel.blueman>
Component: glibcAssignee: Jakub Jelinek <jakub>
Status: CLOSED NOTABUG QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.3CC: fweimer
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Hardware: i386   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2003-03-11 14:37:04 UTC Type: ---
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Description Daniel J Blueman 2003-03-11 14:24:44 UTC
The man page for mremap(2) says to include these header files:
       #include <unistd.h>
       #include <sys/mman.h>

The flags argument can take the flag 'MREMAP_MAYMOVE' which is not defined in 
either of those files, but is in linux/mman.h.

See mremap(2) and grep /usr/include/sys/mman.h for MREMAP_MAYMOVE

Comment 1 Jakub Jelinek 2003-03-11 14:37:04 UTC
MREMAP_MAYMOVE is a GNU extension, so you need to -D_GNU_SOURCE to get it,
otherwise it would break namespace of various standards.
See info libc on Feature Set Macros.