configure.in

基于SDL的framegrabber适用于简单的UI下的webcam应用开发

dnl Process this file with autoconf to produce a configure script.

AC_INIT(SDL_bgrab.c)

dnl SDL version required

SDL_VERSION=1.2.0

dnl Setup for automake

# Making releases:
#   MICRO_VERSION += 1;
#   INTERFACE_AGE += 1;
#   BINARY_AGE += 1;
# if any functions have been added, set INTERFACE_AGE to 0.
# if backwards compatibility has been broken,
# set BINARY_AGE and INTERFACE_AGE to 0.

MAJOR_VERSION=1
MINOR_VERSION=0
MICRO_VERSION=0
INTERFACE_AGE=0
BINARY_AGE=0
VERSION=$MAJOR_VERSION.$MINOR_VERSION.$MICRO_VERSION

AC_SUBST(MAJOR_VERSION)
AC_SUBST(MINOR_VERSION)
AC_SUBST(MICRO_VERSION)
AC_SUBST(INTERFACE_AGE)
AC_SUBST(BINARY_AGE)
AC_SUBST(VERSION)

# libtool versioning
LT_RELEASE=$MAJOR_VERSION.$MINOR_VERSION
LT_CURRENT=`expr $MICRO_VERSION - $INTERFACE_AGE`
LT_REVISION=$INTERFACE_AGE
LT_AGE=`expr $BINARY_AGE - $INTERFACE_AGE`

AC_SUBST(LT_RELEASE)
AC_SUBST(LT_CURRENT)
AC_SUBST(LT_REVISION)
AC_SUBST(LT_AGE)

AM_INIT_AUTOMAKE(SDL_vnc, $VERSION)

dnl Detect the canonical host and target build environment
AC_CANONICAL_HOST
AC_CANONICAL_TARGET

dnl Check for compilers
AC_LIBTOOL_WIN32_DLL
AM_PROG_LIBTOOL
AC_PROG_MAKE_SET
AC_PROG_CC
AC_PROG_CXX
AC_PROG_INSTALL

dnl Check for compiler environment
AC_C_CONST

dnl Set for C compiler by default
AC_LANG_C

dnl Setup target flagsw
case "$target" in
    *-*-cygwin* | *-*-mingw32*)
	CFLAGS="$CFLAGS -DWIN32"
        if test "$build" != "$target"; then # cross-compiling
            ac_default_prefix=/usr/local/cross-tools/i386-mingw32msvc
        fi
        ;;
    *)
	dnl nothing to do
        ;;
esac

dnl Figure out which math library to use
case "$target" in
    *-*-cygwin* | *-*-mingw32*)
        MATHLIB=""
        ;;
    *-*-beos*)
        MATHLIB=""
        ;;
    *-*-darwin*)
        MATHLIB=""
        ;;
    *-*-aix*)
	MATHLIB="-lm"
        if test x$ac_cv_prog_gcc = xyes; then
            CFLAGS="-mthreads"
	fi
        ;;
    *)
        MATHLIB="-lm"
        AC_PATH_X
        AC_PATH_XTRA
        ;;
esac
AC_SUBST(MATHLIB)
LIBS="$LIBS $MATHLIB"

dnl Check for SDL
AM_PATH_SDL($SDL_VERSION,
            :,
	    AC_MSG_ERROR([*** SDL version $SDL_VERSION not found!])
)
CFLAGS="$CFLAGS $SDL_CFLAGS"
LIBS="$LIBS $SDL_LIBS"

# Finally create all the generated files
AC_OUTPUT([Makefile])