mirror of
https://github.com/ckolivas/lrzip.git
synced 2025-12-06 07:12:00 +01:00
29b166629a
accessing the buffer directly, thus allowing us to have window sizes larger than available ram. This is implemented through the use of a "sliding mmap" implementation. Sliding mmap uses two mmapped buffers, one large one as previously, and one page sized smaller one. When an attempt is made to read beyond the end of the large buffer, the small buffer is remapped to the file area that's being accessed. While this implementation is 100x slower than direct mmapping, it allows us to implement unlimited sized compression windows. Implement the -U option with unlimited sized windows. Rework the selection of compression windows. Instead of trying to guess how much ram the machine might be able to access, we try to safely buffer as much ram as we can, and then use that to determine the file buffer size. Do not choose an arbitrary upper window limit unless -w is specified. Rework the -M option to try to buffer the entire file, reducing the buffer size until we succeed. Align buffer sizes to page size. Clean up lots of unneeded variables. Fix lots of minor logic issues to do with window sizes accepted/passed to rzip and the compression backends. More error handling. Change -L to affect rzip compression level directly as well as backend compression level and use 9 by default now. More cleanups of information output. Use 3 point release numbering in case one minor version has many subversions. Numerous minor cleanups and tidying. Updated docs and manpages.
96 lines
2.5 KiB
Plaintext
96 lines
2.5 KiB
Plaintext
dnl Process this file with autoconf to produce a configure script.
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AC_INIT([lrzip],[0.5.1],[kernel@kolivas.org],[lrzip-0.5.1])
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AC_CONFIG_HEADER(config.h)
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# see what our system is!
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AC_CANONICAL_HOST
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AC_ARG_ENABLE(
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asm,
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[AC_HELP_STRING([--enable-asm],[Enable native Assembly code])],
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ASM=$enableval,
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ASM=yes
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)
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if test x"$ASM" = xyes; then
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AC_CHECK_PROG( ASM_PROG, nasm, yes, no )
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if test x"$ASM_PROG" = x"no "; then
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ASM=no
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fi
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fi
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dnl Checks for programs.
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AC_PROG_CC
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AC_PROG_CXX
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AC_PROG_INSTALL
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AC_PROG_LN_S
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AC_SUBST(SHELL)
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AC_SYS_LARGEFILE
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if test x"$GCC" = xyes; then
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CFLAGS="$CFLAGS -Wall -W"
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fi
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AC_CHECK_HEADERS(fcntl.h sys/time.h sys/unistd.h unistd.h)
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AC_CHECK_HEADERS(sys/param.h ctype.h sys/wait.h sys/ioctl.h)
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AC_CHECK_HEADERS(string.h stdlib.h sys/types.h)
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AC_TYPE_OFF_T
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AC_TYPE_SIZE_T
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AC_CHECK_SIZEOF(int)
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AC_CHECK_SIZEOF(long)
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AC_CHECK_SIZEOF(short)
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AC_CACHE_CHECK([for large file support],rzip_cv_HAVE_LARGE_FILES,[
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AC_RUN_IFELSE([AC_LANG_SOURCE([[
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#include <stdio.h>
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#include <sys/types.h>
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main() { return (sizeof(off_t) == 4); }]])],[rzip_cv_HAVE_LARGE_FILES=yes],[rzip_cv_HAVE_LARGE_FILES=no],[rzip_cv_HAVE_LARGE_FILES=cross])])
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if test x"$rzip_cv_HAVE_LARGE_FILES" = x"yes"; then
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AC_DEFINE(HAVE_LARGE_FILES, 1, [ ])
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fi
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AC_C_INLINE
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AC_CHECK_LIB(pthread, pthread_create, ,
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AC_MSG_ERROR([Could not find pthread library - please install libpthread]))
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AC_CHECK_LIB(m, sqrt, ,
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AC_MSG_ERROR([Could not find math library - please install libm]))
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AC_CHECK_LIB(z, compress2, ,
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AC_MSG_ERROR([Could not find zlib library - please install zlib-dev]))
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AC_CHECK_LIB(bz2, BZ2_bzBuffToBuffCompress, ,
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AC_MSG_ERROR([Could not find bz2 library - please install libbz2-dev]))
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AC_CHECK_LIB(lzo2, lzo1x_1_compress, ,
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AC_MSG_ERROR([Could not find lzo2 library - please install liblzo2-dev]))
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AC_DEFINE([HAVE_ERRNO_DECL],[0],[Define to 1 if errno.h present])
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echo $ECHO_N "checking for errno in errno.h... $ECHO_C"
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]], [[int i = errno]])],[echo yes; AC_DEFINE(HAVE_ERRNO_DECL)],[echo no])
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AC_CHECK_FUNCS(mmap strerror)
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AC_CHECK_FUNCS(getopt_long)
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# final checks for x86 and/or assembler
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if test x"$ASM" = x"no"; then
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ASM_OBJ=7zCrc.o
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ASM=
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else
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case $host in
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i?86-*)
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ASM_OBJ="7zCrcT8.o 7zCrcT8U.o"
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ASM="nasm -f elf" ;;
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# x86_64 code is broken still
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# x86_64-*)
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# ASM_OBJ="7zCrcT8.o 7zCrcT8U_64.o"
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# ASM="nasm -f elf64" ;;
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*) ASM_OBJ=7zCrc.o ;;
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esac
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fi
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AC_SUBST([ASM_OBJ])
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AC_SUBST([ASM])
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AC_CONFIG_FILES([Makefile])
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AC_OUTPUT
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