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], [1.0.80])
 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=${CFLAGS}
 SAVED_CXXFLAGS=${CXXFLAGS}
 AC_PROG_CPP
 AC_PROG_CC
 AC_PROG_CXX
 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.])])

 AC_MSG_CHECKING([whether the linker supports version scripts])
 VERSION_SCRIPT=no
 LDVER=`$LD --help </dev/null 2>&1 | grep "\-\-version-script"`
 if test "$LDVER"; then
   VERSION_SCRIPT=yes
   VERSION_SCRIPT_FLAG=-Wl,--version-script,
   AC_MSG_RESULT(yes)
 else
   LDVER=`$LD --help </dev/null 2>&1 | grep "\-M"`
   if test "$LDVER"; then
     VERSION_SCRIPT=yes
     VERSION_SCRIPT_FLAG=-Wl,-M,
     AC_MSG_RESULT(yes)
   else
     AC_MSG_RESULT(no)
   fi
 fi

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

 if test "x${GCC}" = "xyes"; then
   if test "x${SAVED_CFLAGS}" = "x"; then
     CFLAGS=-O3
   fi
   if test "x${SAVED_CXXFLAGS}" = "x"; then
     CXXFLAGS=-O3
   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
   if test "x${SAVED_CXXFLAGS}" = "x"; then
     CXXFLAGS=-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])])

 # Set flags to indicate platform
 case "$host_os" in
   cygwin* | mingw* | pw32* | interix*)
     is_win32=1
   ;;
 esac
 AM_CONDITIONAL([IS_WIN32], [test "x$is_win32" = "x1"])

 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 v8b API/ABI (this makes libjpeg-turbo backward incompatible with libjpeg v6b.)]))
 if test "x${with_jpeg8}" == "xyes"; then
     JPEG_LIB_VERSION=80
     AC_DEFINE([JPEG_LIB_VERSION], [80], [Version 8.0])
     AC_MSG_NOTICE([libjpeg v8b API/ABI emulation enabled])
 else
     if test "x${with_jpeg7}" == "xyes"; then
         JPEG_LIB_VERSION=70
         AC_DEFINE([JPEG_LIB_VERSION], [70], [Version 7.0])
         AC_MSG_NOTICE([libjpeg v7 API/ABI emulation enabled])
     else
         JPEG_LIB_VERSION=62
         AC_DEFINE([JPEG_LIB_VERSION], [62], [Version 6b])
     fi
 fi
 AC_SUBST(JPEG_LIB_VERSION)

 # SIMD is optional
 AC_ARG_WITH([simd],
     AC_HELP_STRING([--without-simd],[Omit accelerated SIMD routines.]))
 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
     ;;
     *)
       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
 fi

 AM_CONDITIONAL([WITH_SIMD], [test "x$with_simd" != "xno"])
 AM_CONDITIONAL([SIMD_I386], [test "x$simd_arch" = "xi386"])
 AM_CONDITIONAL([SIMD_X86_64], [test "x$simd_arch" = "xx86_64"])
 AM_CONDITIONAL([X86_64], [test "x$host_cpu" = "xx86_64" -o "x$host_cpu" = "xamd64"])

 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(DEBARCH)
 AC_SUBST(BUILD)

 # 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([Makefile simd/Makefile])
 AC_OUTPUT
	# -- Autoconf --
	# Process this file with autoconf to produce a configure script.

	AC_PREREQ([2.56])
	AC_INIT([libjpeg-turbo], [1.0.80])
	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=${CFLAGS}
	SAVED_CXXFLAGS=${CXXFLAGS}
	AC_PROG_CPP
	AC_PROG_CC
	AC_PROG_CXX
	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.])])

	AC_MSG_CHECKING([whether the linker supports version scripts])
	VERSION_SCRIPT=no
	LDVER=`$LD --help </dev/null 2>&1 \| grep "\-\-version-script"`
	if test "$LDVER"; then
	VERSION_SCRIPT=yes
	VERSION_SCRIPT_FLAG=-Wl,--version-script,
	AC_MSG_RESULT(yes)
	else
	LDVER=`$LD --help </dev/null 2>&1 \| grep "\-M"`
	if test "$LDVER"; then
	VERSION_SCRIPT=yes
	VERSION_SCRIPT_FLAG=-Wl,-M,
	AC_MSG_RESULT(yes)
	else
	AC_MSG_RESULT(no)
	fi
	fi

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

	if test "x${GCC}" = "xyes"; then
	if test "x${SAVED_CFLAGS}" = "x"; then
	CFLAGS=-O3
	fi
	if test "x${SAVED_CXXFLAGS}" = "x"; then
	CXXFLAGS=-O3
	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
	if test "x${SAVED_CXXFLAGS}" = "x"; then
	CXXFLAGS=-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])])

	# Set flags to indicate platform
	case "$host_os" in
	cygwin* \| mingw* \| pw32* \| interix*)
	is_win32=1
	;;
	esac
	AM_CONDITIONAL([IS_WIN32], [test "x$is_win32" = "x1"])

	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 v8b API/ABI (this makes libjpeg-turbo backward incompatible with libjpeg v6b.)]))
	if test "x${with_jpeg8}" == "xyes"; then
	JPEG_LIB_VERSION=80
	AC_DEFINE([JPEG_LIB_VERSION], [80], [Version 8.0])
	AC_MSG_NOTICE([libjpeg v8b API/ABI emulation enabled])
	else
	if test "x${with_jpeg7}" == "xyes"; then
	JPEG_LIB_VERSION=70
	AC_DEFINE([JPEG_LIB_VERSION], [70], [Version 7.0])
	AC_MSG_NOTICE([libjpeg v7 API/ABI emulation enabled])
	else
	JPEG_LIB_VERSION=62
	AC_DEFINE([JPEG_LIB_VERSION], [62], [Version 6b])
	fi
	fi
	AC_SUBST(JPEG_LIB_VERSION)

	# SIMD is optional
	AC_ARG_WITH([simd],
	AC_HELP_STRING([--without-simd],[Omit accelerated SIMD routines.]))
	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
	;;
	*)
	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
	fi

	AM_CONDITIONAL([WITH_SIMD], [test "x$with_simd" != "xno"])
	AM_CONDITIONAL([SIMD_I386], [test "x$simd_arch" = "xi386"])
	AM_CONDITIONAL([SIMD_X86_64], [test "x$simd_arch" = "xx86_64"])
	AM_CONDITIONAL([X86_64], [test "x$host_cpu" = "xx86_64" -o "x$host_cpu" = "xamd64"])

	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(DEBARCH)
	AC_SUBST(BUILD)

	# 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([Makefile simd/Makefile])
	AC_OUTPUT