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Point to mdb.c for docs on macros in Makefile

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Howard Chu 2013-08-10 14:55:51 -07:00
parent 9c49ef1d71
commit 76f8b77e36
1 changed files with 7 additions and 20 deletions
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27
libraries/liblmdb/Makefile
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@ -5,29 +5,16 @@
#
# Preprocessor macros (for CPPFLAGS) of interest...
# Note that the defaults should already be correct for most
# platforms; you should not need to change any of these:
# platforms; you should not need to change any of these.
# Read their descriptions in mdb.c if you do:
#
# To compile successfully if the default does not:
# - MDB_USE_POSIX_SEM (enabled by default on BSD, Apple)
# Define if shared mutexes are unsupported. Note that Posix
# semaphores and shared mutexes have different behaviors and
# different problems, see the Caveats section in lmdb.h.
#
# For best performance or to compile successfully:
# - MDB_DSYNC = "O_DSYNC" (default) or "O_SYNC" (less efficient)
# If O_DSYNC is undefined but exists in /usr/include,
# preferably set some compiler flag to get the definition.
# - MDB_FDATASYNC = "fdatasync" or "fsync"
# Function for flushing the data of a file. Define this to
# "fsync" if fdatasync() is not supported. fdatasync is
# default except on BSD, Apple, Android which use fsync.
# - MDB_USE_POSIX_SEM
# - MDB_DSYNC
# - MDB_FDATASYNC
# - MDB_USE_PWRITEV
# Define if the pwritev() function is supported.
#
# Data format:
# - MDB_MAXKEYSIZE
# Controls data packing and limits, see mdb.c.
# You might need to change this if the default size is too small.
# There may be other macros in mdb.c of interest. You should
# read mdb.c before changing any of them.
#
CC = gcc
W = -W -Wall -Wno-unused-parameter -Wbad-function-cast