configure.ac - external/github.com/libjpeg-turbo/libjpeg-turbo - Git at Google

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

 AC_PREREQ([2.56])
 AC_INIT([libjpeg-turbo], [1.2.90])
 BUILD=`date +%Y%m%d`

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

 # Always build with prototypes
 AC_DEFINE([HAVE_PROTOTYPES], 1, [Define if your compiler supports prototypes])

 # Checks for programs.
 SAVED_CFLAGS=${CFLAGS}
 SAVED_CPPFLAGS=${CPPFLAGS}
 AC_PROG_CPP
 AC_PROG_CC
 AM_PROG_AS
 AC_PROG_INSTALL
 AC_PROG_LIBTOOL
 AC_PROG_LN_S

 # 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 string.h])
 AC_CHECK_HEADER([sys/types.h], AC_DEFINE([NEED_SYS_TYPES_H], 1, [Define if you have sys/types.h]))

 # 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 shift is unsigned])],
 	[AC_MSG_RESULT(yes)],
 	[AC_MSG_RESULT(Assuming that right shift is signed on target machine.)])

 # test whether global names are unique to at least 15 chars
 AC_MSG_CHECKING([for short external names])
 AC_TRY_LINK(
 	[int possibly_duplicate_function () { return 0; }
 	 int possibly_dupli_function () { return 1; }], [ ],
 	[AC_MSG_RESULT(ok)],
 	[AC_MSG_RESULT(short)
 	 AC_DEFINE([NEED_SHORT_EXTERNAL_NAMES], 1, [Define if you need short function names])])

 # Checks for library functions.
 AC_CHECK_FUNCS([memset memcpy], [],
 	[AC_DEFINE([NEED_BSD_STRINGS], 1,
 		   [Define if you have BSD-like bzero and bcopy])])

 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=0
 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=1
       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(, [} __attribute__((always_inline)) int foo() { return 0; }
 int bar() { return foo();], ljt_cv_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$with_arith_enc" = "xno"; then
     AC_MSG_RESULT(no)
     RPM_CONFIG_ARGS="$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$with_arith_dec" = "xno"; then
     AC_MSG_RESULT(no)
     RPM_CONFIG_ARGS="$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"])

 # 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$with_turbojpeg" = "xno"; then
     AC_MSG_RESULT(no)
     RPM_CONFIG_ARGS="$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_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="$RPM_CONFIG_ARGS --with-java"
     JAVA_RPM_CONTENTS_1='%dir /opt/%{name}/classes'
     JAVA_RPM_CONTENTS_2=/opt/%{name}/classes/turbojpeg.jar
     WITH_JAVA=1
 else
     AC_MSG_RESULT(no)
 fi
 AM_CONDITIONAL([WITH_JAVA], [test "x$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${with_simd}" != "xno"; then
   # Check if we're on a supported CPU
   AC_MSG_CHECKING([if we have SIMD optimisations for cpu type])
   case "$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(
         [AC_MSG_RESULT([yes])
          simd_arch=arm],
         [AC_MSG_RESULT([no])
          with_simd=no
          AC_MSG_WARN([SIMD support can't be enabled.  Performance will suffer.])])
     ;;
     *)
       AC_MSG_RESULT([no ("$host_cpu")])
       AC_MSG_WARN([SIMD support not available for this CPU.  Performance will suffer.])
       with_simd=no;
     ;;
   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([X86_64], [test "x$host_cpu" = "xx86_64" -o "x$host_cpu" = "xamd64"])
 AM_CONDITIONAL([WITH_TURBOJPEG], [test "x$with_turbojpeg" != "xno"])

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

 AC_SUBST(RPMARCH)
 AC_SUBST(RPM_CONFIG_ARGS)
 AC_SUBST(DEBARCH)
 AC_SUBST(BUILD)
 AC_DEFINE_UNQUOTED([BUILD], "$BUILD", [Build number])

 # jconfig.h is the file we use, but we have another before that to
 # fool autoheader. the reason is that we include this header in our
 # API headers, which can screw things up for users of the lib.
 # jconfig.h is a minimal version that allows this package to be built
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_HEADERS([jconfig.h])
 AC_CONFIG_FILES([pkgscripts/libjpeg-turbo.spec:release/libjpeg-turbo.spec.in])
 AC_CONFIG_FILES([pkgscripts/makecygwinpkg:release/makecygwinpkg.in])
 AC_CONFIG_FILES([pkgscripts/makedpkg:release/makedpkg.in])
 AC_CONFIG_FILES([pkgscripts/makemacpkg:release/makemacpkg.in])
 AC_CONFIG_FILES([pkgscripts/Description.plist:release/Description.plist.in])
 AC_CONFIG_FILES([pkgscripts/Info.plist:release/Info.plist.in])
 AC_CONFIG_FILES([pkgscripts/uninstall:release/uninstall.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_OUTPUT
	# -- Autoconf --
	# Process this file with autoconf to produce a configure script.

	AC_PREREQ([2.56])
	AC_INIT([libjpeg-turbo], [1.2.90])
	BUILD=`date +%Y%m%d`

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

	# Always build with prototypes
	AC_DEFINE([HAVE_PROTOTYPES], 1, [Define if your compiler supports prototypes])

	# Checks for programs.
	SAVED_CFLAGS=${CFLAGS}
	SAVED_CPPFLAGS=${CPPFLAGS}
	AC_PROG_CPP
	AC_PROG_CC
	AM_PROG_AS
	AC_PROG_INSTALL
	AC_PROG_LIBTOOL
	AC_PROG_LN_S

	# 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 string.h])
	AC_CHECK_HEADER([sys/types.h], AC_DEFINE([NEED_SYS_TYPES_H], 1, [Define if you have sys/types.h]))

	# 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 shift is unsigned])],
	[AC_MSG_RESULT(yes)],
	[AC_MSG_RESULT(Assuming that right shift is signed on target machine.)])

	# test whether global names are unique to at least 15 chars
	AC_MSG_CHECKING([for short external names])
	AC_TRY_LINK(
	[int possibly_duplicate_function () { return 0; }
	int possibly_dupli_function () { return 1; }], [ ],
	[AC_MSG_RESULT(ok)],
	[AC_MSG_RESULT(short)
	AC_DEFINE([NEED_SHORT_EXTERNAL_NAMES], 1, [Define if you need short function names])])

	# Checks for library functions.
	AC_CHECK_FUNCS([memset memcpy], [],
	[AC_DEFINE([NEED_BSD_STRINGS], 1,
	[Define if you have BSD-like bzero and bcopy])])

	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=0
	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=1
	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(, [} __attribute__((always_inline)) int foo() { return 0; }
	int bar() { return foo();], ljt_cv_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$with_arith_enc" = "xno"; then
	AC_MSG_RESULT(no)
	RPM_CONFIG_ARGS="$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$with_arith_dec" = "xno"; then
	AC_MSG_RESULT(no)
	RPM_CONFIG_ARGS="$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"])

	# 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$with_turbojpeg" = "xno"; then
	AC_MSG_RESULT(no)
	RPM_CONFIG_ARGS="$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_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="$RPM_CONFIG_ARGS --with-java"
	JAVA_RPM_CONTENTS_1='%dir /opt/%{name}/classes'
	JAVA_RPM_CONTENTS_2=/opt/%{name}/classes/turbojpeg.jar
	WITH_JAVA=1
	else
	AC_MSG_RESULT(no)
	fi
	AM_CONDITIONAL([WITH_JAVA], [test "x$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${with_simd}" != "xno"; then
	# Check if we're on a supported CPU
	AC_MSG_CHECKING([if we have SIMD optimisations for cpu type])
	case "$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(
	[AC_MSG_RESULT([yes])
	simd_arch=arm],
	[AC_MSG_RESULT([no])
	with_simd=no
	AC_MSG_WARN([SIMD support can't be enabled. Performance will suffer.])])
	;;
	*)
	AC_MSG_RESULT([no ("$host_cpu")])
	AC_MSG_WARN([SIMD support not available for this CPU. Performance will suffer.])
	with_simd=no;
	;;
	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([X86_64], [test "x$host_cpu" = "xx86_64" -o "x$host_cpu" = "xamd64"])
	AM_CONDITIONAL([WITH_TURBOJPEG], [test "x$with_turbojpeg" != "xno"])

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

	AC_SUBST(RPMARCH)
	AC_SUBST(RPM_CONFIG_ARGS)
	AC_SUBST(DEBARCH)
	AC_SUBST(BUILD)
	AC_DEFINE_UNQUOTED([BUILD], "$BUILD", [Build number])

	# jconfig.h is the file we use, but we have another before that to
	# fool autoheader. the reason is that we include this header in our
	# API headers, which can screw things up for users of the lib.
	# jconfig.h is a minimal version that allows this package to be built
	AC_CONFIG_HEADERS([config.h])
	AC_CONFIG_HEADERS([jconfig.h])
	AC_CONFIG_FILES([pkgscripts/libjpeg-turbo.spec:release/libjpeg-turbo.spec.in])
	AC_CONFIG_FILES([pkgscripts/makecygwinpkg:release/makecygwinpkg.in])
	AC_CONFIG_FILES([pkgscripts/makedpkg:release/makedpkg.in])
	AC_CONFIG_FILES([pkgscripts/makemacpkg:release/makemacpkg.in])
	AC_CONFIG_FILES([pkgscripts/Description.plist:release/Description.plist.in])
	AC_CONFIG_FILES([pkgscripts/Info.plist:release/Info.plist.in])
	AC_CONFIG_FILES([pkgscripts/uninstall:release/uninstall.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_OUTPUT