dnl taken from SDL, audiere.

dnl Process this file with autoconf to produce a configure script.
AC_INIT(README)
dnl AM_INIT_AUTOMAKE

AC_CONFIG_SRCDIR(src/sc2.c)

CFLAGS="$CFLAGS -Wall"

VERSION=2.0
PACKAGE="sc2"

AC_SUBST(VERSION)
AC_SUBST(PACKAGE)


dnl Detect the canonical host and target build environment
AC_CANONICAL_SYSTEM

dnl Setup for automake
AM_INIT_AUTOMAKE(sc2, $VERSION)

dnl Check for tools

AC_PROG_CC
AC_C_INLINE
AC_PROG_RANLIB
dnl AM_PROG_LIBTOOL  (really slow with msys)

dnl AC_PATH_PROG(STRIP, strip)
dnl AC_PATH_PROG(UPX, upx)



dnl Add compiler-specific optimization flags

dnl See if the user wants aggressive optimizations of the code
AC_ARG_ENABLE(debug,
[  --enable-debug          Disable aggressive optimizations [default=no]],
              , enable_debug=no)
if test x$enable_debug != xyes; then
    if test x$ac_cv_prog_gcc = xyes; then
	CFLAGS="$CFLAGS -s -O2 -pipe -ffast-math -fstrength-reduce -freduce-all-givs -fomit-frame-pointer -fexpensive-optimizations"
	LIBS="-s -pipe"
    fi
    case "$target" in
        i486-*-*)
            if test x$ac_cv_prog_gcc = xyes; then
                CFLAGS="$CFLAGS -march=i486"
            fi
            ;;
        i?86-*-*)
            if test x$ac_cv_prog_gcc = xyes; then
                CFLAGS="$CFLAGS -march=pentium -mcpu=pentiumpro"
            fi
            ;;
        *-*-osf*)
            if test x$ac_cv_prog_gcc != xyes; then
                CFLAGS="-g3 -fast -arch host"
            fi
            ;;
    esac
fi

dnl Figure out which math library to use
case "$target" in
    *-*-cygwin* | *-*-mingw32*)
        MATHLIB=""
        SYS_GL_LIBS="-lopengl32 -lGLU32 -lwinmm -lgdi32"
	NFLAGS="-f win32 -D__WIN32__"
        ;;
    *-*-beos*)
        MATHLIB=""
        SYS_GL_LIBS="-lGL -lGLU"
        ;;
    *-*-darwin*)
        MATHLIB=""
        SYS_GL_LIBS=""
        ;;
    *-*-aix*)
        if test x$ac_cv_prog_gcc = xyes; then
            CFLAGS="-mthreads"
	fi
        SYS_GL_LIBS=""
        ;;
    *)
        MATHLIB="-lm"
        AC_PATH_X
        AC_PATH_XTRA
        if test x$have_x = xyes; then
            CFLAGS="$CFLAGS $X_CFLAGS"
            SYS_GL_LIBS="$X_LIBS -lGL -lGLU"
        else
            SYS_GL_LIBS="-lGL -lGLU"
        fi
	NFLAGS="-f elf -D__LINUX__"
        ;;
esac
AC_SUBST(MATHLIB)


dnl Enable/disable various subsystems of the SDL library

AC_ARG_ENABLE(mikmod,
[  --enable-mikmod         Use mikmod instead of minifmod [default=no]],
              , enable_mikmod=no)
if test x$enable_mikmod = xyes; then
    MUSICDIR="mikmod"
    MUSICLIB="mikmod/libmikmod.a"
    CFLAGS="$CFLAGS -I\$(top_srcdir)/src/mikmod"
    CFLAGS="$CFLAGS -DUSE_MIKMOD"
else
    MUSICDIR="minifmod"
    MUSICLIB="minifmod/libminifmod.a"
    CFLAGS="$CFLAGS -I\$(top_srcdir)/src/minifmod"
    LIBS="$LIBS"
   
    AC_PATH_PROG(NASM, nasm)
fi

SDL_VERSION=1.2.7
AM_PATH_SDL($SDL_VERSION,
   :,
   AC_MSG_ERROR([*** SDL version $SDL_VERSION not found!])
)

CFLAGS="$CFLAGS $SDL_CFLAGS"


AC_ARG_ENABLE(sdl,
[  --enable-sdl            Use SDL (no=custom win32 renderer) [default=yes]],
              , enable_sdl=yes)
if test x$enable_sdl = xyes; then

	CFLAGS="$CFLAGS -DUSE_SDL"
	LIBS="$LIBS $SDL_LIBS"
fi

dnl Check for OpenGL
AC_MSG_CHECKING(for OpenGL support)
have_opengl=no
AC_TRY_COMPILE([
 #include "SDL_opengl.h"
],[
],[
have_opengl=yes
])
AC_MSG_RESULT($have_opengl)
if test x$have_opengl = xyes; then
    LIBS="$LIBS $SYS_GL_LIBS"
else
    LIBS="$LIBS"
fi

AC_SUBST(MUSICDIR)
AC_SUBST(MUSICLIB)

AC_SUBST(NFLAGS)

dnl Expand the cflags and libraries needed by apps using SDL
dnl AC_SUBST(CFLAGS)
AC_SUBST(CFLAGS_SSE)
AC_SUBST(LIBS)


dnl Expand the libraries needed for static and dynamic linking
dnl AC_SUBST(STATIC_SYSTEM_LIBS)
dnl AC_SUBST(SHARED_SYSTEM_LIBS)
dnl AC_SUBST(SYSTEM_LIBS)

CXXFLAGS="$CFLAGS"

# Finally create all the generated files
dnl Important: Any directory that you want to be in the distcheck should
dnl            have a file listed here, so that configure generates the
dnl            subdirectories on the build target.
AC_OUTPUT([
Makefile
src/Makefile
src/data/Makefile
src/data/src/Makefile
src/minifmod/Makefile
src/mikmod/Makefile
])