configure.ac - third_party/libjpeg-turbo - Git at Google

 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.

 AC_PREREQ([2.56])
 AC_INIT([libjpeg-turbo], [1.4.80])

 AM_INIT_AUTOMAKE([-Wall foreign dist-bzip2])
 AC_PREFIX_DEFAULT(/opt/libjpeg-turbo)

 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

 # Checks for programs.
 SAVED_CFLAGS=${CFLAGS}
 SAVED_CPPFLAGS=${CPPFLAGS}
 AC_PROG_CPP
 AC_PROG_CC
 m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
 AM_PROG_AS
 AM_PROG_CC_C_O
 AC_PROG_INSTALL
 AC_PROG_LIBTOOL
 AC_PROG_LN_S

 AC_ARG_WITH([build-date], [Use custom build string to enable reproducible builds (default: YYMMDD)],
   [BUILD="$with_build_date"],
   [BUILD=`date +%Y%m%d`])

 PKG_PROG_PKG_CONFIG

 # When the prefix is /opt/libjpeg-turbo, we assume that an "official" binary is
 # being created, and thus we install things into specific locations.

 old_prefix=${prefix}
 if test "x$prefix" = "xNONE" -a "x$ac_default_prefix" != "x"; then
   prefix=$ac_default_prefix
 fi
 DATADIR=`eval echo ${datadir}`
 DATADIR=`eval echo $DATADIR`
 if test "$DATADIR" = "/opt/libjpeg-turbo/share"; then
   datadir='${prefix}'
 fi
 DATADIR=`eval echo ${datarootdir}`
 DATADIR=`eval echo $DATADIR`
 if test "$DATADIR" = "/opt/libjpeg-turbo/share"; then
   datarootdir='${prefix}'
 fi
 DOCDIR=`eval echo ${docdir}`
 DOCDIR=`eval echo $DOCDIR`
 if test "$DOCDIR" = "/opt/libjpeg-turbo/doc/libjpeg-turbo"; then
   docdir='${datadir}/doc'
 fi

 old_exec_prefix=${exec_prefix}
 if test "x$exec_prefix" = "xNONE"; then
   exec_prefix=${prefix}
 fi

 AC_CHECK_SIZEOF(size_t)

 if test "x${libdir}" = 'x${exec_prefix}/lib' -o "x${libdir}" = 'x${prefix}/lib'; then
   LIBDIR=`eval echo ${libdir}`
   LIBDIR=`eval echo $LIBDIR`
   if test "$LIBDIR" = "/opt/libjpeg-turbo/lib"; then
     case $host_os in
       darwin*)
         ;;
       *)
         if test "${ac_cv_sizeof_size_t}" = "8"; then
           libdir='${exec_prefix}/lib64'
         elif test "${ac_cv_sizeof_size_t}" = "4"; then
           libdir='${exec_prefix}/lib32'
         fi
         ;;
     esac
   fi
 fi
 exec_prefix=${old_exec_prefix}
 prefix=${old_prefix}

 # Check whether compiler supports pointers to undefined structures
 AC_MSG_CHECKING(whether compiler supports pointers to undefined structures)
 AC_TRY_COMPILE([ typedef struct undefined_structure *undef_struct_ptr; ], ,
   AC_MSG_RESULT(yes),
   [AC_MSG_RESULT(no)
    AC_DEFINE([INCOMPLETE_TYPES_BROKEN], [1],
      [Compiler does not support pointers to undefined structures.])])

 if test "x${GCC}" = "xyes"; then
   if test "x${SAVED_CFLAGS}" = "x"; then
     CFLAGS=-O3
   fi
   if test "x${SAVED_CPPFLAGS}" = "x"; then
     CPPFLAGS=-Wall
   fi
 fi

 AC_CHECK_DECL([__SUNPRO_C], [SUNCC="yes"], [SUNCC="no"])
 if test "x${SUNCC}" = "xyes"; then
   if test "x${SAVED_CFLAGS}" = "x"; then
     CFLAGS=-xO5
   fi
 fi

 # Checks for libraries.

 # Checks for header files.
 AC_HEADER_STDC
 AC_CHECK_HEADERS([stddef.h stdlib.h locale.h string.h])
 AC_CHECK_HEADER([sys/types.h],
   AC_DEFINE([NEED_SYS_TYPES_H], 1, [Define if you need to include <sys/types.h> to get size_t.]))

 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
 AC_C_CHAR_UNSIGNED
 AC_C_INLINE
 AC_TYPE_SIZE_T
 AC_CHECK_TYPES([unsigned char, unsigned short])

 AC_MSG_CHECKING([if right shift is signed])
 AC_TRY_RUN(
   [#include <stdio.h>
    int is_shifting_signed (long arg) {
      long res = arg >> 4;

      if (res == -0x7F7E80CL)
        return 1; /* right shift is signed */

      /* see if unsigned-shift hack will fix it. */
      /* we can't just test exact value since it depends on width of long... */
      res |= (~0L) << (32-4);
      if (res == -0x7F7E80CL)
        return 0; /* right shift is unsigned */

      printf("Right shift isn't acting as I expect it to.\n");
      printf("I fear the JPEG software will not work at all.\n\n");
      return 0; /* try it with unsigned anyway */
    }
    int main (void) {
      exit(is_shifting_signed(-0x7F7E80B1L));
    }],
   [AC_MSG_RESULT(no)
    AC_DEFINE([RIGHT_SHIFT_IS_UNSIGNED], 1,
      [Define if your (broken) compiler shifts signed values as if they were unsigned.])],
   [AC_MSG_RESULT(yes)],
   [AC_MSG_RESULT(Assuming that right shift is signed on target machine.)])

 # Checks for library functions.
 AC_CHECK_FUNCS([memset memcpy], [],
   [AC_DEFINE([NEED_BSD_STRINGS], 1,
      [Define if you have BSD-like bzero and bcopy in <strings.h> rather than memset/memcpy in <string.h>.])])

 AC_MSG_CHECKING([libjpeg API version])
 AC_ARG_VAR(JPEG_LIB_VERSION, [libjpeg API version (62, 70, or 80)])
 if test "x$JPEG_LIB_VERSION" = "x"; then
   AC_ARG_WITH([jpeg7],
     AC_HELP_STRING([--with-jpeg7],
       [Emulate libjpeg v7 API/ABI (this makes libjpeg-turbo backward incompatible with libjpeg v6b.)]))
   AC_ARG_WITH([jpeg8],
     AC_HELP_STRING([--with-jpeg8],
       [Emulate libjpeg v8 API/ABI (this makes libjpeg-turbo backward incompatible with libjpeg v6b.)]))
   if test "x${with_jpeg8}" = "xyes"; then
     JPEG_LIB_VERSION=80
   else
     if test "x${with_jpeg7}" = "xyes"; then
       JPEG_LIB_VERSION=70
     else
       JPEG_LIB_VERSION=62
     fi
   fi
 fi
 JPEG_LIB_VERSION_DECIMAL=`expr $JPEG_LIB_VERSION / 10`.`expr $JPEG_LIB_VERSION % 10`
 AC_SUBST(JPEG_LIB_VERSION_DECIMAL)
 AC_MSG_RESULT([$JPEG_LIB_VERSION_DECIMAL])
 AC_DEFINE_UNQUOTED(JPEG_LIB_VERSION, [$JPEG_LIB_VERSION],
   [libjpeg API version])

 AC_ARG_VAR(SO_MAJOR_VERSION,
   [Major version of the libjpeg-turbo shared library (default is determined by the API version)])
 AC_ARG_VAR(SO_MINOR_VERSION,
   [Minor version of the libjpeg-turbo shared library (default is determined by the API version)])
 if test "x$SO_MAJOR_VERSION" = "x"; then
   case "$JPEG_LIB_VERSION" in
     62)  SO_MAJOR_VERSION=$JPEG_LIB_VERSION ;;
     *)   SO_MAJOR_VERSION=`expr $JPEG_LIB_VERSION / 10` ;;
   esac
 fi
 if test "x$SO_MINOR_VERSION" = "x"; then
   case "$JPEG_LIB_VERSION" in
     80)  SO_MINOR_VERSION=2 ;;
     *)   SO_MINOR_VERSION=0 ;;
   esac
 fi

 RPM_CONFIG_ARGS=

 # Memory source/destination managers
 SO_AGE=1
 MEM_SRCDST_FUNCTIONS=
 if test "x${with_jpeg8}" != "xyes"; then
   AC_MSG_CHECKING([whether to include in-memory source/destination managers])
   AC_ARG_WITH([mem-srcdst],
     AC_HELP_STRING([--without-mem-srcdst],
       [Do not include in-memory source/destination manager functions when emulating the libjpeg v6b or v7 API/ABI]))
   if test "x$with_mem_srcdst" != "xno"; then
     AC_MSG_RESULT(yes)
     AC_DEFINE([MEM_SRCDST_SUPPORTED], [1],
       [Support in-memory source/destination managers])
     SO_AGE=2
     MEM_SRCDST_FUNCTIONS="global:  jpeg_mem_dest;  jpeg_mem_src;";
   else
     AC_MSG_RESULT(no)
     RPM_CONFIG_ARGS="$RPM_CONFIG_ARGS --without-mem-srcdst"
   fi
 fi

 AC_MSG_CHECKING([libjpeg shared library version])
 AC_MSG_RESULT([$SO_MAJOR_VERSION.$SO_AGE.$SO_MINOR_VERSION])
 LIBTOOL_CURRENT=`expr $SO_MAJOR_VERSION + $SO_AGE`
 AC_SUBST(LIBTOOL_CURRENT)
 AC_SUBST(SO_MAJOR_VERSION)
 AC_SUBST(SO_MINOR_VERSION)
 AC_SUBST(SO_AGE)
 AC_SUBST(MEM_SRCDST_FUNCTIONS)

 AC_DEFINE_UNQUOTED(LIBJPEG_TURBO_VERSION, [$VERSION], [libjpeg-turbo version])

 VERSION_SCRIPT=yes
 AC_ARG_ENABLE([ld-version-script],
   AS_HELP_STRING([--disable-ld-version-script],
     [Disable linker version script for libjpeg-turbo (default is to use linker version script if the linker supports it)]),
   [VERSION_SCRIPT=$enableval], [])

 AC_MSG_CHECKING([whether the linker supports version scripts])
 SAVED_LDFLAGS="$LDFLAGS"
 LDFLAGS="$LDFLAGS -Wl,--version-script,conftest.map"
 cat > conftest.map <<EOF
 VERS_1 {
   global: *;
 };
 EOF
 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
   [VERSION_SCRIPT_FLAG=-Wl,--version-script,;
    AC_MSG_RESULT([yes (GNU style)])],
   [])
 if test "x$VERSION_SCRIPT_FLAG" = "x"; then
   LDFLAGS="$SAVED_LDFLAGS -Wl,-M,conftest.map"
   AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
     [VERSION_SCRIPT_FLAG=-Wl,-M,;
      AC_MSG_RESULT([yes (Sun style)])],
     [])
 fi
 if test "x$VERSION_SCRIPT_FLAG" = "x"; then
   VERSION_SCRIPT=no
   AC_MSG_RESULT(no)
 fi
 LDFLAGS="$SAVED_LDFLAGS"

 AC_MSG_CHECKING([whether to use version script when building libjpeg-turbo])
 AC_MSG_RESULT($VERSION_SCRIPT)

 AM_CONDITIONAL(VERSION_SCRIPT, test "x$VERSION_SCRIPT" = "xyes")
 AC_SUBST(VERSION_SCRIPT_FLAG)

 # Check for non-broken inline under various spellings
 AC_MSG_CHECKING(for inline)
 ljt_cv_inline=""
 AC_TRY_COMPILE(, [} inline __attribute__((always_inline)) int foo() { return 0; }
 int bar() { return foo();], ljt_cv_inline="inline __attribute__((always_inline))",
 AC_TRY_COMPILE(, [} __inline__ int foo() { return 0; }
 int bar() { return foo();], ljt_cv_inline="__inline__",
 AC_TRY_COMPILE(, [} __inline int foo() { return 0; }
 int bar() { return foo();], ljt_cv_inline="__inline",
 AC_TRY_COMPILE(, [} inline int foo() { return 0; }
 int bar() { return foo();], ljt_cv_inline="inline"))))
 AC_MSG_RESULT($ljt_cv_inline)
 AC_DEFINE_UNQUOTED([INLINE],[$ljt_cv_inline],[How to obtain function inlining.])

 # Arithmetic coding support
 AC_MSG_CHECKING([whether to include arithmetic encoding support])
 AC_ARG_WITH([arith-enc],
   AC_HELP_STRING([--without-arith-enc],
     [Do not include arithmetic encoding support]))
 if test "x$with_12bit" = "xyes"; then
   with_arith_enc=no
 fi
 if test "x$with_arith_enc" = "xno"; then
   AC_MSG_RESULT(no)
   RPM_CONFIG_ARGS="$RPM_CONFIG_ARGS --without-arith-enc"
 else
   AC_DEFINE([C_ARITH_CODING_SUPPORTED], [1], [Support arithmetic encoding])
   AC_MSG_RESULT(yes)
 fi
 AM_CONDITIONAL([WITH_ARITH_ENC], [test "x$with_arith_enc" != "xno"])

 AC_MSG_CHECKING([whether to include arithmetic decoding support])
 AC_ARG_WITH([arith-dec],
   AC_HELP_STRING([--without-arith-dec],
     [Do not include arithmetic decoding support]))
 if test "x$with_12bit" = "xyes"; then
   with_arith_dec=no
 fi
 if test "x$with_arith_dec" = "xno"; then
   AC_MSG_RESULT(no)
   RPM_CONFIG_ARGS="$RPM_CONFIG_ARGS --without-arith-dec"
 else
   AC_DEFINE([D_ARITH_CODING_SUPPORTED], [1], [Support arithmetic decoding])
   AC_MSG_RESULT(yes)
 fi
 AM_CONDITIONAL([WITH_ARITH_DEC], [test "x$with_arith_dec" != "xno"])

 AM_CONDITIONAL([WITH_ARITH],
   [test "x$with_arith_dec" != "xno" -o "x$with_arith_enc" != "xno"])

 # 12-bit component support
 AC_MSG_CHECKING([whether to use 12-bit samples])
 AC_ARG_WITH([12bit],
   AC_HELP_STRING([--with-12bit], [Encode/decode JPEG images with 12-bit samples (implies --without-simd --without-turbojpeg --without-arith-dec --without-arith-enc)]))
 if test "x$with_12bit" = "xyes"; then
   AC_DEFINE([BITS_IN_JSAMPLE], [12], [use 8 or 12])
   AC_MSG_RESULT(yes)
 else
   AC_MSG_RESULT(no)
 fi
 AM_CONDITIONAL([WITH_12BIT], [test "x$with_12bit" = "xyes"])

 # TurboJPEG support
 AC_MSG_CHECKING([whether to build TurboJPEG C wrapper])
 AC_ARG_WITH([turbojpeg],
   AC_HELP_STRING([--without-turbojpeg],
     [Do not include the TurboJPEG wrapper library and associated test programs]))
 if test "x$with_12bit" = "xyes"; then
   with_turbojpeg=no
 fi
 if test "x$with_turbojpeg" = "xno"; then
   AC_MSG_RESULT(no)
   RPM_CONFIG_ARGS="$RPM_CONFIG_ARGS --without-turbojpeg"
 else
   AC_MSG_RESULT(yes)
 fi

 # Java support
 AC_ARG_VAR(JAVAC, [Java compiler command (default: javac)])
 if test "x$JAVAC" = "x"; then
   JAVAC=javac
 fi
 AC_SUBST(JAVAC)
 AC_ARG_VAR(JAVACFLAGS, [Java compiler flags])
 AC_SUBST(JAVACFLAGS)
 AC_ARG_VAR(JAR, [Java archive command (default: jar)])
 if test "x$JAR" = "x"; then
   JAR=jar
 fi
 AC_SUBST(JAR)
 AC_ARG_VAR(JAVA, [Java runtime command (default: java)])
 if test "x$JAVA" = "x"; then
   JAVA=java
 fi
 AC_SUBST(JAVA)
 AC_ARG_VAR(JNI_CFLAGS,
   [C compiler flags needed to include jni.h (default: -I/System/Library/Frameworks/JavaVM.framework/Headers on OS X, '-I/usr/java/include -I/usr/java/include/solaris' on Solaris, and '-I/usr/java/default/include -I/usr/java/default/include/linux' on Linux)])

 AC_MSG_CHECKING([whether to build TurboJPEG Java wrapper])
 AC_ARG_WITH([java],
   AC_HELP_STRING([--with-java], [Build Java wrapper for the TurboJPEG library]))
 if test "x$with_12bit" = "xyes" -o "x$with_turbojpeg" = "xno"; then
   with_java=no
 fi

 WITH_JAVA=0
 if test "x$with_java" = "xyes"; then
   AC_MSG_RESULT(yes)

   case $host_os in
     darwin*)
       DEFAULT_JNI_CFLAGS=-I/System/Library/Frameworks/JavaVM.framework/Headers
       ;;
     solaris*)
       DEFAULT_JNI_CFLAGS='-I/usr/java/include -I/usr/java/include/solaris'
       ;;
     linux*)
       DEFAULT_JNI_CFLAGS='-I/usr/java/default/include -I/usr/java/default/include/linux'
       ;;
   esac
   if test "x$JNI_CFLAGS" = "x"; then
     JNI_CFLAGS=$DEFAULT_JNI_CFLAGS
   fi

   SAVE_CPPFLAGS=${CPPFLAGS}
   CPPFLAGS="${CPPFLAGS} ${JNI_CFLAGS}"
   AC_CHECK_HEADERS([jni.h], [DUMMY=1],
     [AC_MSG_ERROR([Could not find JNI header file])])
   CPPFLAGS=${SAVE_CPPFLAGS}
   AC_SUBST(JNI_CFLAGS)

   RPM_CONFIG_ARGS="$RPM_CONFIG_ARGS --with-java"
   JAVA_RPM_CONTENTS_1='%dir %{_datadir}/classes'
   JAVA_RPM_CONTENTS_2=%{_datadir}/classes/turbojpeg.jar
   WITH_JAVA=1
 else
   AC_MSG_RESULT(no)
 fi
 AM_CONDITIONAL([WITH_JAVA], [test "x$with_java" = "xyes"])
 AC_SUBST(WITH_JAVA)
 AC_SUBST(JAVA_RPM_CONTENTS_1)
 AC_SUBST(JAVA_RPM_CONTENTS_2)

 # optionally force using gas-preprocessor.pl for compatibility testing
 AC_ARG_WITH([gas-preprocessor],
   AC_HELP_STRING([--with-gas-preprocessor],
     [Force using gas-preprocessor.pl on ARM.]))
 if test "x${with_gas_preprocessor}" = "xyes"; then
   case $host_os in
     darwin*)
       CCAS="gas-preprocessor.pl -fix-unreq $CC"
       ;;
     *)
       CCAS="gas-preprocessor.pl -no-fix-unreq $CC"
       ;;
   esac
   AC_SUBST([CCAS])
 fi

 # SIMD is optional
 AC_ARG_WITH([simd],
   AC_HELP_STRING([--without-simd], [Do not include SIMD extensions]))
 if test "x$with_12bit" = "xyes"; then
   with_simd=no
 fi
 if test "x${with_simd}" != "xno"; then
   require_simd=no
   if test "x${with_simd}" = "xyes"; then
     require_simd=yes
   fi
   # Check if we're on a supported CPU
   AC_MSG_CHECKING([if we have SIMD optimisations for cpu type])
   case "$host_cpu" in
     x86_64 | amd64)
       AC_MSG_RESULT([yes (x86_64)])
       AC_PROG_NASM
       simd_arch=x86_64
       ;;
     i*86 | x86 | ia32)
       AC_MSG_RESULT([yes (i386)])
       AC_PROG_NASM
       simd_arch=i386
       ;;
     arm*)
       AC_MSG_RESULT([yes (arm)])
       AC_MSG_CHECKING([if the assembler is GNU-compatible and can be used])
       AC_CHECK_COMPATIBLE_ARM_ASSEMBLER_IFELSE(
         [if test "x$ac_use_gas_preprocessor" = "xyes"; then
            AC_MSG_RESULT([yes (with gas-preprocessor)])
          else
            AC_MSG_RESULT([yes])
          fi
          simd_arch=arm],
         [AC_MSG_RESULT([no])
          with_simd=no])
       if test "x${with_simd}" = "xno"; then
         if test "x${require_simd}" = "xyes"; then
           AC_MSG_ERROR([SIMD support can't be enabled.])
         else
           AC_MSG_WARN([SIMD support can't be enabled.  Performance will suffer.])
         fi
       fi
       ;;
     aarch64*)
       AC_MSG_RESULT([yes (arm64)])
       AC_MSG_CHECKING([if the assembler is GNU-compatible and can be used])
       AC_CHECK_COMPATIBLE_ARM64_ASSEMBLER_IFELSE(
         [if test "x$ac_use_gas_preprocessor" = "xyes"; then
            AC_MSG_RESULT([yes (with gas-preprocessor)])
          else
            AC_MSG_RESULT([yes])
          fi
          simd_arch=aarch64],
         [AC_MSG_RESULT([no])
          with_simd=no])
       if test "x${with_simd}" = "xno"; then
         if test "x${require_simd}" = "xyes"; then
           AC_MSG_ERROR([SIMD support can't be enabled.])
         else
           AC_MSG_WARN([SIMD support can't be enabled.  Performance will suffer.])
         fi
       fi
       ;;
     mips*)
       AC_MSG_RESULT([yes (mips)])
       AC_MSG_CHECKING([if the assembler is GNU-compatible and can be used])
       AC_CHECK_COMPATIBLE_MIPS_ASSEMBLER_IFELSE(
         [AC_MSG_RESULT([yes])
          simd_arch=mips],
         [AC_MSG_RESULT([no])
          with_simd=no])
       if test "x${with_simd}" = "xno"; then
         if test "x${require_simd}" = "xyes"; then
           AC_MSG_ERROR([SIMD support can't be enabled.])
         else
           AC_MSG_WARN([SIMD support can't be enabled.  Performance will suffer.])
         fi
       fi
       ;;
     powerpc*)
       AC_MSG_RESULT([yes (powerpc)])
       simd_arch=powerpc
       ;;
     *)
       AC_MSG_RESULT([no ("$host_cpu")])
       with_simd=no;
       if test "x${require_simd}" = "xyes"; then
         AC_MSG_ERROR([SIMD support not available for this CPU.])
       else
         AC_MSG_WARN([SIMD support not available for this CPU.  Performance will suffer.])
       fi
       ;;
   esac

   if test "x${with_simd}" != "xno"; then
     AC_DEFINE([WITH_SIMD], [1], [Use accelerated SIMD routines.])
   fi
 else
   RPM_CONFIG_ARGS="$RPM_CONFIG_ARGS --without-simd"
 fi

 AM_CONDITIONAL([WITH_SIMD], [test "x$with_simd" != "xno"])
 AM_CONDITIONAL([WITH_SSE_FLOAT_DCT], [test "x$simd_arch" = "xx86_64" -o "x$simd_arch" = "xi386"])
 AM_CONDITIONAL([SIMD_I386], [test "x$simd_arch" = "xi386"])
 AM_CONDITIONAL([SIMD_X86_64], [test "x$simd_arch" = "xx86_64"])
 AM_CONDITIONAL([SIMD_ARM], [test "x$simd_arch" = "xarm"])
 AM_CONDITIONAL([SIMD_ARM_64], [test "x$simd_arch" = "xaarch64"])
 AM_CONDITIONAL([SIMD_MIPS], [test "x$simd_arch" = "xmips"])
 AM_CONDITIONAL([SIMD_POWERPC], [test "x$simd_arch" = "xpowerpc"])
 AM_CONDITIONAL([X86_64], [test "x$host_cpu" = "xx86_64" -o "x$host_cpu" = "xamd64"])
 AM_CONDITIONAL([WITH_TURBOJPEG], [test "x$with_turbojpeg" != "xno"])
 AM_CONDITIONAL([CROSS_COMPILING], [test "x$cross_compiling" = "xyes"])

 AC_ARG_VAR(PKGNAME, [distribution package name (default: libjpeg-turbo)])
 if test "x$PKGNAME" = "x"; then
   PKGNAME=$PACKAGE_NAME
 fi
 AC_SUBST(PKGNAME)

 case "$host_cpu" in
   x86_64)
     RPMARCH=x86_64
     DEBARCH=amd64
     ;;
   i*86 | x86 | ia32)
     RPMARCH=i386
     DEBARCH=i386
     ;;
   *)
     RPMARCH=`uname -m`
     DEBARCH=$RPMARCH
     ;;
 esac

 if test "${docdir}" = ""; then
   docdir=${datadir}/doc
   AC_SUBST(docdir)
 fi

 AC_SUBST(RPMARCH)
 AC_SUBST(RPM_CONFIG_ARGS)
 AC_SUBST(DEBARCH)
 AC_SUBST(BUILD)
 AC_DEFINE_UNQUOTED([BUILD], "$BUILD", [libjpeg-turbo build number])

 # NOTE: autoheader automatically modifies the input file of the first
 # invocation of AC_CONFIG_HEADERS, so we put config.h first to prevent
 # jconfig.h.in from being clobbered.  config.h is used only internally, whereas
 # jconfig.h contains macros that are relevant to external programs (macros that
 # specify which features were built into the library.)
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_HEADERS([jconfig.h])
 AC_CONFIG_HEADERS([jconfigint.h])
 AC_CONFIG_FILES([pkgscripts/libjpeg-turbo.spec.tmpl:release/libjpeg-turbo.spec.in])
 AC_CONFIG_FILES([pkgscripts/makecygwinpkg.tmpl:release/makecygwinpkg.in])
 AC_CONFIG_FILES([pkgscripts/makedpkg.tmpl:release/makedpkg.in])
 AC_CONFIG_FILES([pkgscripts/makemacpkg.tmpl:release/makemacpkg.in])
 AC_CONFIG_FILES([pkgscripts/uninstall.tmpl:release/uninstall.in])
 AC_CONFIG_FILES([pkgscripts/libjpeg.pc:release/libjpeg.pc.in])
 AC_CONFIG_FILES([pkgscripts/libturbojpeg.pc:release/libturbojpeg.pc.in])
 if test "x$with_turbojpeg" != "xno"; then
   AC_CONFIG_FILES([tjbenchtest])
 fi
 if test "x$with_java" = "xyes"; then
   AC_CONFIG_FILES([tjbenchtest.java])
   AC_CONFIG_FILES([tjexampletest])
 fi
 AC_CONFIG_FILES([libjpeg.map])
 AC_CONFIG_FILES([Makefile simd/Makefile])
 AC_CONFIG_FILES([java/Makefile])
 AC_CONFIG_FILES([md5/Makefile])
 AC_OUTPUT
	# -- Autoconf --
	# Process this file with autoconf to produce a configure script.

	AC_PREREQ([2.56])
	AC_INIT([libjpeg-turbo], [1.4.80])

	AM_INIT_AUTOMAKE([-Wall foreign dist-bzip2])
	AC_PREFIX_DEFAULT(/opt/libjpeg-turbo)

	m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

	# Checks for programs.
	SAVED_CFLAGS=${CFLAGS}
	SAVED_CPPFLAGS=${CPPFLAGS}
	AC_PROG_CPP
	AC_PROG_CC
	m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
	AM_PROG_AS
	AM_PROG_CC_C_O
	AC_PROG_INSTALL
	AC_PROG_LIBTOOL
	AC_PROG_LN_S

	AC_ARG_WITH([build-date], [Use custom build string to enable reproducible builds (default: YYMMDD)],
	[BUILD="$with_build_date"],
	[BUILD=`date +%Y%m%d`])

	PKG_PROG_PKG_CONFIG

	# When the prefix is /opt/libjpeg-turbo, we assume that an "official" binary is
	# being created, and thus we install things into specific locations.

	old_prefix=${prefix}
	if test "x$prefix" = "xNONE" -a "x$ac_default_prefix" != "x"; then
	prefix=$ac_default_prefix
	fi
	DATADIR=`eval echo ${datadir}`
	DATADIR=`eval echo $DATADIR`
	if test "$DATADIR" = "/opt/libjpeg-turbo/share"; then
	datadir='${prefix}'
	fi
	DATADIR=`eval echo ${datarootdir}`
	DATADIR=`eval echo $DATADIR`
	if test "$DATADIR" = "/opt/libjpeg-turbo/share"; then
	datarootdir='${prefix}'
	fi
	DOCDIR=`eval echo ${docdir}`
	DOCDIR=`eval echo $DOCDIR`
	if test "$DOCDIR" = "/opt/libjpeg-turbo/doc/libjpeg-turbo"; then
	docdir='${datadir}/doc'
	fi

	old_exec_prefix=${exec_prefix}
	if test "x$exec_prefix" = "xNONE"; then
	exec_prefix=${prefix}
	fi

	AC_CHECK_SIZEOF(size_t)

	if test "x${libdir}" = 'x${exec_prefix}/lib' -o "x${libdir}" = 'x${prefix}/lib'; then
	LIBDIR=`eval echo ${libdir}`
	LIBDIR=`eval echo $LIBDIR`
	if test "$LIBDIR" = "/opt/libjpeg-turbo/lib"; then
	case $host_os in
	darwin*)
	;;
	*)
	if test "${ac_cv_sizeof_size_t}" = "8"; then
	libdir='${exec_prefix}/lib64'
	elif test "${ac_cv_sizeof_size_t}" = "4"; then
	libdir='${exec_prefix}/lib32'
	fi
	;;
	esac
	fi
	fi
	exec_prefix=${old_exec_prefix}
	prefix=${old_prefix}

	# Check whether compiler supports pointers to undefined structures
	AC_MSG_CHECKING(whether compiler supports pointers to undefined structures)
	AC_TRY_COMPILE([ typedef struct undefined_structure *undef_struct_ptr; ], ,
	AC_MSG_RESULT(yes),
	[AC_MSG_RESULT(no)
	AC_DEFINE([INCOMPLETE_TYPES_BROKEN], [1],
	[Compiler does not support pointers to undefined structures.])])

	if test "x${GCC}" = "xyes"; then
	if test "x${SAVED_CFLAGS}" = "x"; then
	CFLAGS=-O3
	fi
	if test "x${SAVED_CPPFLAGS}" = "x"; then
	CPPFLAGS=-Wall
	fi
	fi

	AC_CHECK_DECL([__SUNPRO_C], [SUNCC="yes"], [SUNCC="no"])
	if test "x${SUNCC}" = "xyes"; then
	if test "x${SAVED_CFLAGS}" = "x"; then
	CFLAGS=-xO5
	fi
	fi

	# Checks for libraries.

	# Checks for header files.
	AC_HEADER_STDC
	AC_CHECK_HEADERS([stddef.h stdlib.h locale.h string.h])
	AC_CHECK_HEADER([sys/types.h],
	AC_DEFINE([NEED_SYS_TYPES_H], 1, [Define if you need to include <sys/types.h> to get size_t.]))

	# Checks for typedefs, structures, and compiler characteristics.
	AC_C_CONST
	AC_C_CHAR_UNSIGNED
	AC_C_INLINE
	AC_TYPE_SIZE_T
	AC_CHECK_TYPES([unsigned char, unsigned short])

	AC_MSG_CHECKING([if right shift is signed])
	AC_TRY_RUN(
	[#include <stdio.h>
	int is_shifting_signed (long arg) {
	long res = arg >> 4;

	if (res == -0x7F7E80CL)
	return 1; /* right shift is signed */

	/* see if unsigned-shift hack will fix it. */
	/* we can't just test exact value since it depends on width of long... */
	res \|= (~0L) << (32-4);
	if (res == -0x7F7E80CL)
	return 0; /* right shift is unsigned */

	printf("Right shift isn't acting as I expect it to.\n");
	printf("I fear the JPEG software will not work at all.\n\n");
	return 0; /* try it with unsigned anyway */
	}
	int main (void) {
	exit(is_shifting_signed(-0x7F7E80B1L));
	}],
	[AC_MSG_RESULT(no)
	AC_DEFINE([RIGHT_SHIFT_IS_UNSIGNED], 1,
	[Define if your (broken) compiler shifts signed values as if they were unsigned.])],
	[AC_MSG_RESULT(yes)],
	[AC_MSG_RESULT(Assuming that right shift is signed on target machine.)])

	# Checks for library functions.
	AC_CHECK_FUNCS([memset memcpy], [],
	[AC_DEFINE([NEED_BSD_STRINGS], 1,
	[Define if you have BSD-like bzero and bcopy in <strings.h> rather than memset/memcpy in <string.h>.])])

	AC_MSG_CHECKING([libjpeg API version])
	AC_ARG_VAR(JPEG_LIB_VERSION, [libjpeg API version (62, 70, or 80)])
	if test "x$JPEG_LIB_VERSION" = "x"; then
	AC_ARG_WITH([jpeg7],
	AC_HELP_STRING([--with-jpeg7],
	[Emulate libjpeg v7 API/ABI (this makes libjpeg-turbo backward incompatible with libjpeg v6b.)]))
	AC_ARG_WITH([jpeg8],
	AC_HELP_STRING([--with-jpeg8],
	[Emulate libjpeg v8 API/ABI (this makes libjpeg-turbo backward incompatible with libjpeg v6b.)]))
	if test "x${with_jpeg8}" = "xyes"; then
	JPEG_LIB_VERSION=80
	else
	if test "x${with_jpeg7}" = "xyes"; then
	JPEG_LIB_VERSION=70
	else
	JPEG_LIB_VERSION=62
	fi
	fi
	fi
	JPEG_LIB_VERSION_DECIMAL=`expr $JPEG_LIB_VERSION / 10`.`expr $JPEG_LIB_VERSION % 10`
	AC_SUBST(JPEG_LIB_VERSION_DECIMAL)
	AC_MSG_RESULT([$JPEG_LIB_VERSION_DECIMAL])
	AC_DEFINE_UNQUOTED(JPEG_LIB_VERSION, [$JPEG_LIB_VERSION],
	[libjpeg API version])

	AC_ARG_VAR(SO_MAJOR_VERSION,
	[Major version of the libjpeg-turbo shared library (default is determined by the API version)])
	AC_ARG_VAR(SO_MINOR_VERSION,
	[Minor version of the libjpeg-turbo shared library (default is determined by the API version)])
	if test "x$SO_MAJOR_VERSION" = "x"; then
	case "$JPEG_LIB_VERSION" in
	62) SO_MAJOR_VERSION=$JPEG_LIB_VERSION ;;
	*) SO_MAJOR_VERSION=`expr $JPEG_LIB_VERSION / 10` ;;
	esac
	fi
	if test "x$SO_MINOR_VERSION" = "x"; then
	case "$JPEG_LIB_VERSION" in
	80) SO_MINOR_VERSION=2 ;;
	*) SO_MINOR_VERSION=0 ;;
	esac
	fi

	RPM_CONFIG_ARGS=

	# Memory source/destination managers
	SO_AGE=1
	MEM_SRCDST_FUNCTIONS=
	if test "x${with_jpeg8}" != "xyes"; then
	AC_MSG_CHECKING([whether to include in-memory source/destination managers])
	AC_ARG_WITH([mem-srcdst],
	AC_HELP_STRING([--without-mem-srcdst],
	[Do not include in-memory source/destination manager functions when emulating the libjpeg v6b or v7 API/ABI]))
	if test "x$with_mem_srcdst" != "xno"; then
	AC_MSG_RESULT(yes)
	AC_DEFINE([MEM_SRCDST_SUPPORTED], [1],
	[Support in-memory source/destination managers])
	SO_AGE=2
	MEM_SRCDST_FUNCTIONS="global: jpeg_mem_dest; jpeg_mem_src;";
	else
	AC_MSG_RESULT(no)
	RPM_CONFIG_ARGS="$RPM_CONFIG_ARGS --without-mem-srcdst"
	fi
	fi

	AC_MSG_CHECKING([libjpeg shared library version])
	AC_MSG_RESULT([$SO_MAJOR_VERSION.$SO_AGE.$SO_MINOR_VERSION])
	LIBTOOL_CURRENT=`expr $SO_MAJOR_VERSION + $SO_AGE`
	AC_SUBST(LIBTOOL_CURRENT)
	AC_SUBST(SO_MAJOR_VERSION)
	AC_SUBST(SO_MINOR_VERSION)
	AC_SUBST(SO_AGE)
	AC_SUBST(MEM_SRCDST_FUNCTIONS)

	AC_DEFINE_UNQUOTED(LIBJPEG_TURBO_VERSION, [$VERSION], [libjpeg-turbo version])

	VERSION_SCRIPT=yes
	AC_ARG_ENABLE([ld-version-script],
	AS_HELP_STRING([--disable-ld-version-script],
	[Disable linker version script for libjpeg-turbo (default is to use linker version script if the linker supports it)]),
	[VERSION_SCRIPT=$enableval], [])

	AC_MSG_CHECKING([whether the linker supports version scripts])
	SAVED_LDFLAGS="$LDFLAGS"
	LDFLAGS="$LDFLAGS -Wl,--version-script,conftest.map"
	cat > conftest.map <<EOF
	VERS_1 {
	global: *;
	};
	EOF
	AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
	[VERSION_SCRIPT_FLAG=-Wl,--version-script,;
	AC_MSG_RESULT([yes (GNU style)])],
	[])
	if test "x$VERSION_SCRIPT_FLAG" = "x"; then
	LDFLAGS="$SAVED_LDFLAGS -Wl,-M,conftest.map"
	AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
	[VERSION_SCRIPT_FLAG=-Wl,-M,;
	AC_MSG_RESULT([yes (Sun style)])],
	[])
	fi
	if test "x$VERSION_SCRIPT_FLAG" = "x"; then
	VERSION_SCRIPT=no
	AC_MSG_RESULT(no)
	fi
	LDFLAGS="$SAVED_LDFLAGS"

	AC_MSG_CHECKING([whether to use version script when building libjpeg-turbo])
	AC_MSG_RESULT($VERSION_SCRIPT)

	AM_CONDITIONAL(VERSION_SCRIPT, test "x$VERSION_SCRIPT" = "xyes")
	AC_SUBST(VERSION_SCRIPT_FLAG)

	# Check for non-broken inline under various spellings
	AC_MSG_CHECKING(for inline)
	ljt_cv_inline=""
	AC_TRY_COMPILE(, [} inline __attribute__((always_inline)) int foo() { return 0; }
	int bar() { return foo();], ljt_cv_inline="inline __attribute__((always_inline))",
	AC_TRY_COMPILE(, [} __inline__ int foo() { return 0; }
	int bar() { return foo();], ljt_cv_inline="__inline__",
	AC_TRY_COMPILE(, [} __inline int foo() { return 0; }
	int bar() { return foo();], ljt_cv_inline="__inline",
	AC_TRY_COMPILE(, [} inline int foo() { return 0; }
	int bar() { return foo();], ljt_cv_inline="inline"))))
	AC_MSG_RESULT($ljt_cv_inline)
	AC_DEFINE_UNQUOTED([INLINE],[$ljt_cv_inline],[How to obtain function inlining.])

	# Arithmetic coding support
	AC_MSG_CHECKING([whether to include arithmetic encoding support])
	AC_ARG_WITH([arith-enc],
	AC_HELP_STRING([--without-arith-enc],
	[Do not include arithmetic encoding support]))
	if test "x$with_12bit" = "xyes"; then
	with_arith_enc=no
	fi
	if test "x$with_arith_enc" = "xno"; then
	AC_MSG_RESULT(no)
	RPM_CONFIG_ARGS="$RPM_CONFIG_ARGS --without-arith-enc"
	else
	AC_DEFINE([C_ARITH_CODING_SUPPORTED], [1], [Support arithmetic encoding])
	AC_MSG_RESULT(yes)
	fi
	AM_CONDITIONAL([WITH_ARITH_ENC], [test "x$with_arith_enc" != "xno"])

	AC_MSG_CHECKING([whether to include arithmetic decoding support])
	AC_ARG_WITH([arith-dec],
	AC_HELP_STRING([--without-arith-dec],
	[Do not include arithmetic decoding support]))
	if test "x$with_12bit" = "xyes"; then
	with_arith_dec=no
	fi
	if test "x$with_arith_dec" = "xno"; then
	AC_MSG_RESULT(no)
	RPM_CONFIG_ARGS="$RPM_CONFIG_ARGS --without-arith-dec"
	else
	AC_DEFINE([D_ARITH_CODING_SUPPORTED], [1], [Support arithmetic decoding])
	AC_MSG_RESULT(yes)
	fi
	AM_CONDITIONAL([WITH_ARITH_DEC], [test "x$with_arith_dec" != "xno"])

	AM_CONDITIONAL([WITH_ARITH],
	[test "x$with_arith_dec" != "xno" -o "x$with_arith_enc" != "xno"])

	# 12-bit component support
	AC_MSG_CHECKING([whether to use 12-bit samples])
	AC_ARG_WITH([12bit],
	AC_HELP_STRING([--with-12bit], [Encode/decode JPEG images with 12-bit samples (implies --without-simd --without-turbojpeg --without-arith-dec --without-arith-enc)]))
	if test "x$with_12bit" = "xyes"; then
	AC_DEFINE([BITS_IN_JSAMPLE], [12], [use 8 or 12])
	AC_MSG_RESULT(yes)
	else
	AC_MSG_RESULT(no)
	fi
	AM_CONDITIONAL([WITH_12BIT], [test "x$with_12bit" = "xyes"])

	# TurboJPEG support
	AC_MSG_CHECKING([whether to build TurboJPEG C wrapper])
	AC_ARG_WITH([turbojpeg],
	AC_HELP_STRING([--without-turbojpeg],
	[Do not include the TurboJPEG wrapper library and associated test programs]))
	if test "x$with_12bit" = "xyes"; then
	with_turbojpeg=no
	fi
	if test "x$with_turbojpeg" = "xno"; then
	AC_MSG_RESULT(no)
	RPM_CONFIG_ARGS="$RPM_CONFIG_ARGS --without-turbojpeg"
	else
	AC_MSG_RESULT(yes)
	fi

	# Java support
	AC_ARG_VAR(JAVAC, [Java compiler command (default: javac)])
	if test "x$JAVAC" = "x"; then
	JAVAC=javac
	fi
	AC_SUBST(JAVAC)
	AC_ARG_VAR(JAVACFLAGS, [Java compiler flags])
	AC_SUBST(JAVACFLAGS)
	AC_ARG_VAR(JAR, [Java archive command (default: jar)])
	if test "x$JAR" = "x"; then
	JAR=jar
	fi
	AC_SUBST(JAR)
	AC_ARG_VAR(JAVA, [Java runtime command (default: java)])
	if test "x$JAVA" = "x"; then
	JAVA=java
	fi
	AC_SUBST(JAVA)
	AC_ARG_VAR(JNI_CFLAGS,
	[C compiler flags needed to include jni.h (default: -I/System/Library/Frameworks/JavaVM.framework/Headers on OS X, '-I/usr/java/include -I/usr/java/include/solaris' on Solaris, and '-I/usr/java/default/include -I/usr/java/default/include/linux' on Linux)])

	AC_MSG_CHECKING([whether to build TurboJPEG Java wrapper])
	AC_ARG_WITH([java],
	AC_HELP_STRING([--with-java], [Build Java wrapper for the TurboJPEG library]))
	if test "x$with_12bit" = "xyes" -o "x$with_turbojpeg" = "xno"; then
	with_java=no
	fi

	WITH_JAVA=0
	if test "x$with_java" = "xyes"; then
	AC_MSG_RESULT(yes)

	case $host_os in
	darwin*)
	DEFAULT_JNI_CFLAGS=-I/System/Library/Frameworks/JavaVM.framework/Headers
	;;
	solaris*)
	DEFAULT_JNI_CFLAGS='-I/usr/java/include -I/usr/java/include/solaris'
	;;
	linux*)
	DEFAULT_JNI_CFLAGS='-I/usr/java/default/include -I/usr/java/default/include/linux'
	;;
	esac
	if test "x$JNI_CFLAGS" = "x"; then
	JNI_CFLAGS=$DEFAULT_JNI_CFLAGS
	fi

	SAVE_CPPFLAGS=${CPPFLAGS}
	CPPFLAGS="${CPPFLAGS} ${JNI_CFLAGS}"
	AC_CHECK_HEADERS([jni.h], [DUMMY=1],
	[AC_MSG_ERROR([Could not find JNI header file])])
	CPPFLAGS=${SAVE_CPPFLAGS}
	AC_SUBST(JNI_CFLAGS)

	RPM_CONFIG_ARGS="$RPM_CONFIG_ARGS --with-java"
	JAVA_RPM_CONTENTS_1='%dir %{_datadir}/classes'
	JAVA_RPM_CONTENTS_2=%{_datadir}/classes/turbojpeg.jar
	WITH_JAVA=1
	else
	AC_MSG_RESULT(no)
	fi
	AM_CONDITIONAL([WITH_JAVA], [test "x$with_java" = "xyes"])
	AC_SUBST(WITH_JAVA)
	AC_SUBST(JAVA_RPM_CONTENTS_1)
	AC_SUBST(JAVA_RPM_CONTENTS_2)

	# optionally force using gas-preprocessor.pl for compatibility testing
	AC_ARG_WITH([gas-preprocessor],
	AC_HELP_STRING([--with-gas-preprocessor],
	[Force using gas-preprocessor.pl on ARM.]))
	if test "x${with_gas_preprocessor}" = "xyes"; then
	case $host_os in
	darwin*)
	CCAS="gas-preprocessor.pl -fix-unreq $CC"
	;;
	*)
	CCAS="gas-preprocessor.pl -no-fix-unreq $CC"
	;;
	esac
	AC_SUBST([CCAS])
	fi

	# SIMD is optional
	AC_ARG_WITH([simd],
	AC_HELP_STRING([--without-simd], [Do not include SIMD extensions]))
	if test "x$with_12bit" = "xyes"; then
	with_simd=no
	fi
	if test "x${with_simd}" != "xno"; then
	require_simd=no
	if test "x${with_simd}" = "xyes"; then
	require_simd=yes
	fi
	# Check if we're on a supported CPU
	AC_MSG_CHECKING([if we have SIMD optimisations for cpu type])
	case "$host_cpu" in
	x86_64 \| amd64)
	AC_MSG_RESULT([yes (x86_64)])
	AC_PROG_NASM
	simd_arch=x86_64
	;;
	i*86 \| x86 \| ia32)
	AC_MSG_RESULT([yes (i386)])
	AC_PROG_NASM
	simd_arch=i386
	;;
	arm*)
	AC_MSG_RESULT([yes (arm)])
	AC_MSG_CHECKING([if the assembler is GNU-compatible and can be used])
	AC_CHECK_COMPATIBLE_ARM_ASSEMBLER_IFELSE(
	[if test "x$ac_use_gas_preprocessor" = "xyes"; then
	AC_MSG_RESULT([yes (with gas-preprocessor)])
	else
	AC_MSG_RESULT([yes])
	fi
	simd_arch=arm],
	[AC_MSG_RESULT([no])
	with_simd=no])
	if test "x${with_simd}" = "xno"; then
	if test "x${require_simd}" = "xyes"; then
	AC_MSG_ERROR([SIMD support can't be enabled.])
	else
	AC_MSG_WARN([SIMD support can't be enabled. Performance will suffer.])
	fi
	fi
	;;
	aarch64*)
	AC_MSG_RESULT([yes (arm64)])
	AC_MSG_CHECKING([if the assembler is GNU-compatible and can be used])
	AC_CHECK_COMPATIBLE_ARM64_ASSEMBLER_IFELSE(
	[if test "x$ac_use_gas_preprocessor" = "xyes"; then
	AC_MSG_RESULT([yes (with gas-preprocessor)])
	else
	AC_MSG_RESULT([yes])
	fi
	simd_arch=aarch64],
	[AC_MSG_RESULT([no])
	with_simd=no])
	if test "x${with_simd}" = "xno"; then
	if test "x${require_simd}" = "xyes"; then
	AC_MSG_ERROR([SIMD support can't be enabled.])
	else
	AC_MSG_WARN([SIMD support can't be enabled. Performance will suffer.])
	fi
	fi
	;;
	mips*)
	AC_MSG_RESULT([yes (mips)])
	AC_MSG_CHECKING([if the assembler is GNU-compatible and can be used])
	AC_CHECK_COMPATIBLE_MIPS_ASSEMBLER_IFELSE(
	[AC_MSG_RESULT([yes])
	simd_arch=mips],
	[AC_MSG_RESULT([no])
	with_simd=no])
	if test "x${with_simd}" = "xno"; then
	if test "x${require_simd}" = "xyes"; then
	AC_MSG_ERROR([SIMD support can't be enabled.])
	else
	AC_MSG_WARN([SIMD support can't be enabled. Performance will suffer.])
	fi
	fi
	;;
	powerpc*)
	AC_MSG_RESULT([yes (powerpc)])
	simd_arch=powerpc
	;;
	*)
	AC_MSG_RESULT([no ("$host_cpu")])
	with_simd=no;
	if test "x${require_simd}" = "xyes"; then
	AC_MSG_ERROR([SIMD support not available for this CPU.])
	else
	AC_MSG_WARN([SIMD support not available for this CPU. Performance will suffer.])
	fi
	;;
	esac

	if test "x${with_simd}" != "xno"; then
	AC_DEFINE([WITH_SIMD], [1], [Use accelerated SIMD routines.])
	fi
	else
	RPM_CONFIG_ARGS="$RPM_CONFIG_ARGS --without-simd"
	fi

	AM_CONDITIONAL([WITH_SIMD], [test "x$with_simd" != "xno"])
	AM_CONDITIONAL([WITH_SSE_FLOAT_DCT], [test "x$simd_arch" = "xx86_64" -o "x$simd_arch" = "xi386"])
	AM_CONDITIONAL([SIMD_I386], [test "x$simd_arch" = "xi386"])
	AM_CONDITIONAL([SIMD_X86_64], [test "x$simd_arch" = "xx86_64"])
	AM_CONDITIONAL([SIMD_ARM], [test "x$simd_arch" = "xarm"])
	AM_CONDITIONAL([SIMD_ARM_64], [test "x$simd_arch" = "xaarch64"])
	AM_CONDITIONAL([SIMD_MIPS], [test "x$simd_arch" = "xmips"])
	AM_CONDITIONAL([SIMD_POWERPC], [test "x$simd_arch" = "xpowerpc"])
	AM_CONDITIONAL([X86_64], [test "x$host_cpu" = "xx86_64" -o "x$host_cpu" = "xamd64"])
	AM_CONDITIONAL([WITH_TURBOJPEG], [test "x$with_turbojpeg" != "xno"])
	AM_CONDITIONAL([CROSS_COMPILING], [test "x$cross_compiling" = "xyes"])

	AC_ARG_VAR(PKGNAME, [distribution package name (default: libjpeg-turbo)])
	if test "x$PKGNAME" = "x"; then
	PKGNAME=$PACKAGE_NAME
	fi
	AC_SUBST(PKGNAME)

	case "$host_cpu" in
	x86_64)
	RPMARCH=x86_64
	DEBARCH=amd64
	;;
	i*86 \| x86 \| ia32)
	RPMARCH=i386
	DEBARCH=i386
	;;
	*)
	RPMARCH=`uname -m`
	DEBARCH=$RPMARCH
	;;
	esac

	if test "${docdir}" = ""; then
	docdir=${datadir}/doc
	AC_SUBST(docdir)
	fi

	AC_SUBST(RPMARCH)
	AC_SUBST(RPM_CONFIG_ARGS)
	AC_SUBST(DEBARCH)
	AC_SUBST(BUILD)
	AC_DEFINE_UNQUOTED([BUILD], "$BUILD", [libjpeg-turbo build number])

	# NOTE: autoheader automatically modifies the input file of the first
	# invocation of AC_CONFIG_HEADERS, so we put config.h first to prevent
	# jconfig.h.in from being clobbered. config.h is used only internally, whereas
	# jconfig.h contains macros that are relevant to external programs (macros that
	# specify which features were built into the library.)
	AC_CONFIG_HEADERS([config.h])
	AC_CONFIG_HEADERS([jconfig.h])
	AC_CONFIG_HEADERS([jconfigint.h])
	AC_CONFIG_FILES([pkgscripts/libjpeg-turbo.spec.tmpl:release/libjpeg-turbo.spec.in])
	AC_CONFIG_FILES([pkgscripts/makecygwinpkg.tmpl:release/makecygwinpkg.in])
	AC_CONFIG_FILES([pkgscripts/makedpkg.tmpl:release/makedpkg.in])
	AC_CONFIG_FILES([pkgscripts/makemacpkg.tmpl:release/makemacpkg.in])
	AC_CONFIG_FILES([pkgscripts/uninstall.tmpl:release/uninstall.in])
	AC_CONFIG_FILES([pkgscripts/libjpeg.pc:release/libjpeg.pc.in])
	AC_CONFIG_FILES([pkgscripts/libturbojpeg.pc:release/libturbojpeg.pc.in])
	if test "x$with_turbojpeg" != "xno"; then
	AC_CONFIG_FILES([tjbenchtest])
	fi
	if test "x$with_java" = "xyes"; then
	AC_CONFIG_FILES([tjbenchtest.java])
	AC_CONFIG_FILES([tjexampletest])
	fi
	AC_CONFIG_FILES([libjpeg.map])
	AC_CONFIG_FILES([Makefile simd/Makefile])
	AC_CONFIG_FILES([java/Makefile])
	AC_CONFIG_FILES([md5/Makefile])
	AC_OUTPUT