dnl ==========================================================================dnldnl Autoconf script for XviDdnldnl Copyright(C) 2003-2004 Edouard Gomez <ed.gomez@free.fr>dnldnl ==========================================================================AC_PREREQ([2.50])AC_INIT([XviD], [1.0.2], [xvid-devel@xvid.org])AC_CONFIG_SRCDIR(configure.in)dnl Do not forget to increase that when needed.API_MAJOR="4"API_MINOR="0"dnl NASM version requirementminimum_nasm_patch_version=34nasm_prog="nasm"dnl Default CFLAGS -- Big impact on overall speedour_cflags_defaults="-Wall"our_cflags_defaults="$our_cflags_defaults -O2"our_cflags_defaults="$our_cflags_defaults -fstrength-reduce"our_cflags_defaults="$our_cflags_defaults -finline-functions"our_cflags_defaults="$our_cflags_defaults -freduce-all-givs"our_cflags_defaults="$our_cflags_defaults -ffast-math"our_cflags_defaults="$our_cflags_defaults -fomit-frame-pointer"dnl ==========================================================================dnl Features - configure optionsdnl ==========================================================================FEATURES=""dnl Internal DebugAC_ARG_ENABLE(idebug,		AC_HELP_STRING([--enable-idebug],				 [Enable internal debug function]),		 [if test "$enable_idebug" = "yes" ; then		     FEATURES="$FEATURES -D_DEBUG"		  fi])dnl Internal ProfileAC_ARG_ENABLE(iprofile,		AC_HELP_STRING([--enable-iprofile],				 [Enable internal profiling]),		 [if test "$enable_iprofile" = "yes" ; then		     FEATURES="$FEATURES -D_PROFILING_"		  fi])dnl GNU Profiling optionsAC_ARG_ENABLE(gnuprofile,		AC_HELP_STRING([--enable-gnuprofile],				 [Enable profiling informations for gprof]),		 [if test "$enable_gnuprofile" = "yes" ; then		     GNU_PROF_CFLAGS="-pg -fprofile-arcs -ftest-coverage"		     GNU_PROF_LDFLAGS="-pg"		  fi])dnl Assembly codeAC_ARG_ENABLE(assembly,		AC_HELP_STRING([--disable-assembly],				 [Disable assembly code]),		 [if test "$enable_assembly" = "no" ; then		     assembly="no"		  else		     if test "$enable_assembly" = "yes" ; then			assembly="yes"		     fi		  fi],		 [assembly="yes"])dnl Build as a module not a shared lib on darwinAC_ARG_ENABLE(macosx_module,		AC_HELP_STRING([--enable-macosx_module],				 [Build as a module on MacOS X]),		 [if test "$enable_macosx_module" = "yes" ; then		     macosx_module="yes"		  else 		     macosx_module="no"		  fi],		  [macosx_module="no"])dnl ==========================================================================dnl Default install prefix and checks build typednl ==========================================================================AC_PREFIX_DEFAULT("/usr/local")AC_CANONICAL_BUILDAC_CANONICAL_HOSTAC_CANONICAL_TARGETdnl ==========================================================================dnl Check for the C compiler (could be passed on command line)dnl ==========================================================================dnldnl First we test if CFLAGS have been passed on command linednl I do that because autoconf defaults (-g -O2) suck and they would killdnl performance. To prevent that we define a good defult CFLAGS at the enddnl of the script if and only if CFLAGS has not been passed on the commanddnl linednlAC_MSG_CHECKING(whether to use default CFLAGS)if test  x"$CFLAGS" = x"" ; then   force_default_cc_options="yes"   AC_MSG_RESULT([yes])else   force_default_cc_options="no"   AC_MSG_RESULT([no])fidnl Now we can safely check for the C compilerAC_PROG_CCdnl ==========================================================================dnl Check for the install programdnl ==========================================================================AC_PROG_INSTALLdnl ==========================================================================dnl Check for the ranlib program to generate static library indexdnl ==========================================================================AC_PROG_RANLIBdnl ==========================================================================dnldnl This part looks for:dnldnl ARCHITECTURE : The platform architecturednl                - IA32 for mmx, mmx-ext, mmx2, sse assemblydnl                - IA64dnl                - PPC for PowerPC assembly routinesdnl                - GENERIC for plain C sources onlydnldnl BUS: Address bus size (in bits)dnl      - 32dnl      - 64dnldnl ENDIANNESS: I think you can guess what this thing means :-)dnl             - LITTLE_ENDIANdnl             - BIG_ENDIANdnldnl ==========================================================================dnldnl Looking what sources have to be compiled according to the CPU typednlARCHITECTURE=""AC_MSG_CHECKING([for whether to use assembly code])if test x"$assembly" = x"yes" ; then   AC_MSG_RESULT([yes])   AC_MSG_CHECKING([for architecture type])   case "$target_cpu" in	  i[[3456]]86)	  AC_MSG_RESULT(ia32)	  	ARCHITECTURE="IA32"		;;			powerpc)		AC_MSG_RESULT(PowerPC)		dnl ATM the ppc port is out of date 		dnl ARCHITECTURE="PPC"		ARCHITECTURE="GENERIC"		;;		ia64)		AC_MSG_RESULT(ia64)		ARCHITECTURE="IA64"		;;		*)		AC_MSG_RESULT($target_cpu)		ARCHITECTURE="GENERIC"		;;   esacelse   AC_MSG_RESULT([no])   ARCHITECTURE="GENERIC"fidnldnl Testing address bus lengthdnlBUS=""AC_CHECK_SIZEOF([int *])case "$ac_cv_sizeof_int_p" in     4)	BUS="32BIT"	;;     8)	BUS="64BIT"	;;     *)	AC_MSG_ERROR([XviD supports only 32/64 bit architectures])	;;esacdnldnl Testing endiannessdnlENDIANNESS=""AC_C_BIGENDIAN(ENDIANNESS="BIG_ENDIAN", ENDIANNESS="LITTLE_ENDIAN")dnl ==========================================================================dnldnl Check for OS specific variablesdnl    - SHARED_EXTENSION, STATIC_EXTENSION, OBJECT_EXTENSIONdnldnl ==========================================================================AC_MSG_CHECKING(for build extensions)SHARED_EXTENSION=""STATIC_EXTENSION=""OBJECT_EXTENSION=""case "$target_os" in     *bsd*|linux*|beos|irix*|solaris*)	AC_MSG_RESULT([.so .a .o])	STATIC_EXTENSION="a"	SHARED_EXTENSION="so"	OBJECT_EXTENSION="o"	;;     [[cC]][[yY]][[gG]][[wW]][[iI]][[nN]]*|mingw32*|mks*)	AC_MSG_RESULT([.dll .a .obj])	STATIC_EXTENSION="a"	SHARED_EXTENSION="dll"	OBJECT_EXTENSION="obj"	;;     darwin*|raphsody*)	if test x"$macosx_module" = x"yes"; then	   AC_MSG_RESULT([.so .a .o])	   SHARED_EXTENSION="so"        else	   AC_MSG_RESULT([.dynlib .a .o])	   SHARED_EXTENSION="dylib"	fi	STATIC_EXTENSION="a"	OBJECT_EXTENSION="o"	;;     *)        AC_MSG_RESULT([Unknown OS - Using .so .a .o])	STATIC_EXTENSION="a"	SHARED_EXTENSION="so"	OBJECT_EXTENSION="o"	;;esacdnl ==========================================================================dnldnl Determines best options for CC and LDdnl  - STATIC_LIB, SHARED_LIB, SPECIFIC_CFLAGS, SPECIFIC_LDLAGSdnldnl ==========================================================================AC_MSG_CHECKING(for platform specific LDFLAGS/CFLAGS)SPECIFIC_LDFLAGS=""SPECIFIC_CFLAGS=""PRE_SHARED_LIB=""case "$target_os" in     *bsd*|linux*|irix*|solaris*)	AC_MSG_RESULT([ok])	STATIC_LIB="libxvidcore.\$(STATIC_EXTENSION)"	SHARED_LIB="libxvidcore.\$(SHARED_EXTENSION).\$(API_MAJOR).\$(API_MINOR)"	SPECIFIC_LDFLAGS="-Wl,-soname,libxvidcore.\$(SHARED_EXTENSION).\$(API_MAJOR) -shared -lc -lm"	SPECIFIC_CFLAGS="-fPIC"	;;     [[cC]][[yY]][[gG]][[wW]][[iI]][[nN]]*|mingw32*|mks*)	AC_MSG_RESULT([ok])	STATIC_LIB="xvidcore.\$(STATIC_EXTENSION)"	SHARED_LIB="xvidcore.\$(SHARED_EXTENSION)"	SPECIFIC_LDFLAGS="-mno-cygwin -shared -Wl,--dll,--out-implib,\$@.a libxvidcore.def"	SPECIFIC_CFLAGS="-mno-cygwin"	;;     darwin*|raphsody*)	STATIC_LIB="libxvidcore.\$(STATIC_EXTENSION)"	SPECIFIC_CFLAGS="-fPIC -fno-common -no-cpp-precomp"	if test x"$macosx_module" = x"no"; then	   AC_MSG_RESULT([dylib options])	   SHARED_LIB="libxvidcore.\$(API_MAJOR).\$(SHARED_EXTENSION)"	   SPECIFIC_LDFLAGS="-dynamiclib -flat_namespace -compatibility_version \$(API_MAJOR) -current_version \$(API_MAJOR).\$(API_MINOR) -install_name \$(libdir)/\$(SHARED_LIB)"	else 	   AC_MSG_RESULT([module options]) 	   PRE_SHARED_LIB="libxvidcore.\$(SHARED_EXTENSION)-temp.o"	   SHARED_LIB="libxvidcore.\$(SHARED_EXTENSION).\$(API_MAJOR)"	   SPECIFIC_LDFLAGS="-r -keep_private_externs -nostdlib && \$(CC) \$(LDFLAGS) \$(PRE_SHARED_LIB) -o libxvidcore.\$(SHARED_EXTENSION).\$(API_MAJOR) -bundle -flat_namespace -undefined suppress"	fi	;;     beos)	AC_MSG_RESULT([ok])	STATIC_LIB="libxvidcore.\$(STATIC_EXTENSION)"	SHARED_LIB="libxvidcore.\$(SHARED_EXTENSION)"	SPECIFIC_LDFLAGS="-nostart"	SPECIFIC_CFLAGS="-fPIC"	;;     *)        AC_MSG_RESULT([Unknown Platform (Using default -shared -lc -lm)])	STATIC_LIB="libxvidcore.\$(STATIC_EXTENSION)"	SHARED_LIB="libxvidcore.\$(SHARED_EXTENSION)"	SPECIFIC_LDFLAGS=""	SPECIFIC_CFLAGS=""	;;esacif test x"$PRE_SHARED_LIB" = x; then   PRE_SHARED_LIB=$SHARED_LIBfidnl ==========================================================================dnldnl Assembler stuffdnl  - AS, AFLAGS, ASSEMBLY_EXTENSION, SOURCESdnldnl ==========================================================================AS=""AFLAGS=""ASSEMBLY_EXTENSION=""GENERIC_SOURCES="SRC_GENERIC"ASSEMBLY_SOURCES=""dnldnl IA32dnlif test "$ARCHITECTURE" = "IA32" ; then   dnl   dnl Checking nasm existence   dnl   AC_CHECK_PROG([ac_nasm], [$nasm_prog], [yes], [no], , [yes])   if test "$ac_nasm" = "yes" ; then      dnl      dnl Checking nasm patch version      dnl      AC_MSG_CHECKING([for nasm patch version])      nasm_patch=`nasm -r | cut -d '.' -f 3 | cut -d ' ' -f 1`      if test -z $nasm_patch ; then        nasm_patch=-1      fi      AC_MSG_RESULT([$nasm_patch])      if test "$nasm_patch" -lt "$minimum_nasm_patch_version" ; then        AC_MSG_WARN([nasm patch version too old - Compiling generic sources only])	ARCHITECTURE="GENERIC"      else         dnl         dnl Checking nasm format - win32 or elf         dnl         AC_MSG_CHECKING([for nasm object format])         case "$target_os" in              *bsd*|linux*|beos|irix*|solaris*)                  AC_MSG_RESULT([elf])                  NASM_FORMAT="elf"		  PREFIX=""                  ;;              [[cC]][[yY]][[gG]][[wW]][[iI]][[nN]]*|mingw32*|mks*)                  AC_MSG_RESULT([win32])                  NASM_FORMAT="win32"		  PREFIX="-DPREFIX"                  ;;          esac          AS=nasm          AFLAGS="-I\$(<D)/ -f $NASM_FORMAT $PREFIX"          ASSEMBLY_EXTENSION="asm"          ASSEMBLY_SOURCES="SRC_IA32"       fi   else	AC_MSG_WARN([nasm not found - Compiling generic sources only])	ARCHITECTURE="GENERIC"   fifidnldnl PPCdnlif test "$ARCHITECTURE" = "PPC" ; then   AS="\$(CC)"   AFLAGS="-c"   ASSEMBLY_EXTENSION="s"   ASSEMBLY_SOURCES="SRC_PPC"   AC_MSG_CHECKING([for Altivec support])   cat > conftest.S << EOF         .text         vxor 0,0,0EOF   if $CC -c conftest.S 2>/dev/null 1>/dev/null ; then        AC_MSG_RESULT(yes)        SPECIFIC_CFLAGS="$SPECIFIC_CFLAGS -DARCH_IS_PPC_ALTIVEC"        ASSEMBLY_SOURCES="SRC_ALTIVEC"   else        AC_MSG_RESULT(no)   fi   rm -f conftest.*fidnldnl IA64dnlif test "$ARCHITECTURE" = "IA64" ; then   AS="\$(CC)"   AFLAGS="-c"   ASSEMBLY_EXTENSION="s"   ASSEMBLY_SOURCES="SRC_IA64"   case `basename $CC` in	*ecc*)		DCT_IA64_SOURCES="SRC_IA64_IDCT_ECC"		dnl If the compiler is ecc, then i don't know its options		dnl fallback to "no options"		if test "$force_default_cc_options" = "yes" ; then		   our_cflags_defaults=""		fi		;;	*)		DCT_IA64_SOURCES="SRC_IA64_IDCT_GCC"		;;   esacfidnl ==========================================================================dnldnl Check for header filesdnldnl ==========================================================================AC_CHECK_HEADERS(	stdio.h \	signal.h \	stdlib.h \	string.h \	assert.h \	math.h \	, , AC_MSG_ERROR(Missing header file))dnl ==========================================================================dnldnl Now we can set CFLAGS if neededdnldnl ==========================================================================if test "$force_default_cc_options" = "yes" ; then   CFLAGS="$our_cflags_defaults"fidnl ==========================================================================dnldnl Profiling stuff goes herednl  - adds options to SPECIFIC_CFLAGS, SPECIFIC_LDLAGSdnl  - removes incompatible options from CFLAGSdnldnl ==========================================================================SPECIFIC_LDFLAGS="$SPECIFIC_LDFLAGS $GNU_PROF_LDFLAGS"SPECIFIC_CFLAGS="$SPECIFIC_CFLAGS $GNU_PROF_CFLAGS"if test "$enable_gnuprofile" = "yes" ; then   CFLAGS=`echo $CFLAGS | sed s/'-fomit-frame-pointer'/''/`fidnl ==========================================================================dnldnl Substitionsdnldnl ==========================================================================AC_SUBST(FEATURES)AC_SUBST(ARCHITECTURE)AC_SUBST(BUS)AC_SUBST(ENDIANNESS)AC_SUBST(SHARED_EXTENSION)AC_SUBST(STATIC_EXTENSION)AC_SUBST(OBJECT_EXTENSION)AC_SUBST(NASM_FORMAT)AC_SUBST(AS)AC_SUBST(AFLAGS)AC_SUBST(ASSEMBLY_EXTENSION)AC_SUBST(GENERIC_SOURCES)AC_SUBST(ASSEMBLY_SOURCES)AC_SUBST(CC)AC_SUBST(CFLAGS)AC_SUBST(SPECIFIC_LDFLAGS)AC_SUBST(SPECIFIC_CFLAGS)AC_SUBST(DCT_IA64_SOURCES)AC_SUBST(RANLIB)AC_SUBST(API_MAJOR)AC_SUBST(API_MINOR)AC_SUBST(STATIC_LIB)AC_SUBST(PRE_SHARED_LIB)AC_SUBST(SHARED_LIB)dnl ==========================================================================dnldnl Output filesdnldnl ==========================================================================AC_CONFIG_FILES(platform.inc)AC_OUTPUT