1f5ab4280a
* kern/i386/pc/lzo1x.S: New file. * util/i386/pc/pupa-mkimage.c: Include lzo1x.h. (compress_kernel): New variable. (generate_image): Heavily modified to support compressing a large part of the core image. * util/misc.c (pupa_util_read_image): Fix a file descriptor leak. (pupa_util_load_image): New function. * kern/i386/pc/startup.S: Include pupa/machine/kernel.h. (pupa_compressed_size): New variable. (codestart): Enable Gate A20 here. Decompress the compressed part of the core image. Rearrange the code to put functions and variables which are required for initialization in the non-compressed part. Include lzo1x.S. * kern/i386/pc/init.c (pupa_machine_init): Don't enable Gate A20 here. * include/pupa/util/misc.h (pupa_util_write_image): Declared. * include/pupa/i386/pc/kernel.h (PUPA_KERNEL_MACHINE_COMPRESSED_SIZE): New macro. (PUPA_KERNEL_MACHINE_INSTALL_DOS_PART): Increased by 4. (PUPA_KERNEL_MACHINE_INSTALL_BSD_PART): Likewise. (PUPA_KERNEL_MACHINE_PREFIX): Likewise. (PUPA_KERNEL_MACHINE_RAW_SIZE): New macro. * conf/i386-pc.rmk (pupa_mkimage_LDFLAGS): New variable. * genmk.rb (Image#rule): Put LDFLAGS at the end of a line. (Utility#rule): Likewise. * configure.ac: Check if LZO is available.
141 lines
3.6 KiB
Text
141 lines
3.6 KiB
Text
# Process this file with autoconf to produce a configure script.
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# Copyright (C) 2002,2003 Yoshinori K. Okuji <okuji@enbug.org>
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#
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# This configure.ac is free software; the author
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
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# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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# PARTICULAR PURPOSE.
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AC_INIT(PUPA, 0.6, [okuji@enbug.org])
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AC_PREREQ(2.53)
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AC_CONFIG_SRCDIR([include/pupa/dl.h])
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AC_CONFIG_HEADER([config.h])
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# Checks for build and host systems.
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AC_CANONICAL_BUILD
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AC_CANONICAL_HOST
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case "$host_cpu" in
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i[[3456]]86) host_cpu=i386 ;;
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*) AC_MSG_ERROR([unsupported CPU type]) ;;
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esac
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case "$host_cpu"-"$host_vendor" in
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i386-*) host_vendor=pc ;;
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*) AC_MSG_ERROR([unsupported machine type]) ;;
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esac
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AC_SUBST(host_cpu)
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AC_SUBST(host_vendor)
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# Checks for programs.
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if test "x$CFLAGS" = x; then
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default_CFLAGS=yes
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fi
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AC_PROG_CC
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# Must be GCC.
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test "x$GCC" = xyes || AC_MSG_ERROR([GCC is required])
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if test "x$default_CFLAGS" = xyes; then
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# debug flags.
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tmp_CFLAGS="-Wall -W -Wshadow -Wpointer-arith -Wmissing-prototypes \
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-Wundef -Wstrict-prototypes -g"
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# optimization flags.
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AC_CACHE_CHECK([whether optimization for size works], size_flag, [
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CFLAGS=-Os
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AC_TRY_COMPILE(, , size_flag=yes, size_flag=no)
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])
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if test "x$size_flag" = xyes; then
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tmp_CFLAGS="$tmp_CFLAGS -Os"
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else
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tmp_CFLAGS="$tmp_CFLAGS -O2 -fno-strength-reduce -fno-unroll-loops"
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fi
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# Force no alignment to save space on i386.
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if test "x$host_cpu" = xi386; then
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AC_CACHE_CHECK([whether -falign-loops works], [falign_loop_flag], [
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CFLAGS="-falign-loops=1"
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AC_TRY_COMPILE(, , [falign_loop_flag=yes], [falign_loop_flag=no])
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])
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if test "x$falign_loop_flag" = xyes; then
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tmp_CFLAGS="$tmp_CFLAGS -falign-jumps=1 -falign-loops=1 -falign-functions=1"
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else
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tmp_CFLAGS="$tmp_CFLAGS -malign-jumps=1 -malign-loops=1 -malign-functions=1"
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fi
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fi
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CFLAGS="$tmp_CFLAGS"
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fi
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AC_SUBST(CFLAGS)
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# Defined in aclocal.m4.
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pupa_ASM_USCORE
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pupa_CHECK_START_SYMBOL
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pupa_CHECK_BSS_START_SYMBOL
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pupa_CHECK_END_SYMBOL
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if test "x$host_cpu" = xi386; then
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pupa_I386_ASM_PREFIX_REQUIREMENT
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pupa_I386_ASM_ADDR32
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pupa_I386_ASM_ABSOLUTE_WITHOUT_ASTERISK
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fi
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AC_PROG_INSTALL
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AC_PROG_MAKE_SET
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AC_CHECK_TOOL(OBJCOPY, objcopy)
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pupa_PROG_OBJCOPY_ABSOLUTE
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AC_CHECK_TOOL(STRIP, strip)
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AC_CHECK_TOOL(NM, nm)
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AC_CHECK_TOOL(LD, ld)
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# This is not a "must".
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AC_PATH_PROG(RUBY, ruby)
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# For cross-compiling.
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if test "x$build" = "x$host"; then
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BUILD_CC="$CC"
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AC_SUBST(BUILD_CC)
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else
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AC_CHECK_PROGS(BUILD_CC, [gcc egcs cc],
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[AC_MSG_ERROR([none of gcc, egcs and cc is found. set BUILD_CC manually.])])
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fi
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# Test the C compiler for the build environment.
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tmp_CC="$CC"
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tmp_CFLAGS="$CFLAGS"
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tmp_CPPFLAGS="$CPPFLAGS"
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CC="$BUILD_CC"
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CFLAGS="$BUILD_CFLAGS"
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CPPFLAGS="$BUILD_CPPFLAGS"
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# Identify characteristics of the build architecture.
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AC_C_BIGENDIAN
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AC_CHECK_SIZEOF(void *)
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AC_CHECK_SIZEOF(long)
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# Check LZO.
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AC_CHECK_LIB(lzo, __lzo_init2, ,
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AC_MSG_ERROR([LZO library version 1.02 or later is required]))
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AC_CHECK_FUNC(lzo1x_999_compress, ,
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[AC_MSG_ERROR([LZO1X-999 must be enabled])])
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CC="$tmp_CC"
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CFLAGS="$tmp_CFLAGS"
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CPPFLAGS="$tmp_CPPFLAGS"
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# Output files.
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AC_CONFIG_LINKS([include/pupa/cpu:include/pupa/$host_cpu
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include/pupa/machine:include/pupa/$host_cpu/$host_vendor])
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AC_CONFIG_FILES([Makefile])
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AC_CONFIG_FILES([stamp-h], [echo timestamp > stamp-h])
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AC_OUTPUT
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