freetype2.m4

来自「ftgl-2.1.2 夸平台的opengl显示字体」· M4 代码 · 共 113 行

# Configure paths for FreeType2
# Marcelo Magallon 2001-10-26, based on gtk.m4 by Owen Taylor

dnl AC_CHECK_FT2([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
dnl Test for FreeType2, and define FT2_CFLAGS and FT2_LIBS
dnl
AC_DEFUN(AC_CHECK_FT2,
[dnl
dnl Get the cflags and libraries from the freetype-config script
dnl
AC_ARG_WITH(freetype-prefix,
[  --with-ft-prefix=PFX      Prefix where FreeType is installed (optional)],
            ft_config_prefix="$withval", ft_config_prefix="")
AC_ARG_WITH(freetype-exec-prefix,
[  --with-ft-exec-prefix=PFX Exec prefix where FreeType is installed (optional)],
            ft_config_exec_prefix="$withval", ft_config_exec_prefix="")
AC_ARG_ENABLE(freetypetest, [  --disable-freetypetest  Do not try to compile and run a test FreeType program],[],
              enable_fttest=yes)

if test x$ft_config_exec_prefix != x ; then
  ft_config_args="$ft_config_args --exec-prefix=$ft_config_exec_prefix"
  if test x${FT2_CONFIG+set} != xset ; then
    FT2_CONFIG=$ft_config_exec_prefix/bin/freetype-config
  fi
fi
if test x$ft_config_prefix != x ; then
  ft_config_args="$ft_config_args --prefix=$ft_config_prefix"
  if test x${FT2_CONFIG+set} != xset ; then
    FT2_CONFIG=$ft_config_prefix/bin/freetype-config
  fi
fi
AC_PATH_PROG(FT2_CONFIG, freetype-config, no)

min_ft_version=ifelse([$1], ,6.1.0,$1)
AC_MSG_CHECKING(for FreeType - version >= $min_ft_version)
no_ft=""
if test "$FT2_CONFIG" = "no" ; then
  no_ft=yes
else
  FT2_CFLAGS=`$FT2_CONFIG $ft_config_args --cflags`
  FT2_LIBS=`$FT2_CONFIG $ft_config_args --libs`
  ft_config_version=`$FT2_CONFIG $ft_config_args --version`
  ft_config_major_version=`echo $ft_config_version | cut -d . -f 1`
  ft_config_minor_version=`echo $ft_config_version | cut -d . -f 2`
  ft_config_micro_version=`echo $ft_config_version | cut -d . -f 3`
  ft_min_major_version=`echo $min_ft_version | cut -d . -f 1`
  ft_min_minor_version=`echo $min_ft_version | cut -d . -f 2`
  ft_min_micro_version=`echo $min_ft_version | cut -d . -f 3`
  if test "x$enable_fttest" = "xyes" ; then
    ft_config_version=`expr $ft_config_major_version \* 10000 + $ft_config_minor_version \* 100 + $ft_config_micro_version`
    ft_min_version=`expr $ft_min_major_version \* 10000 + $ft_min_minor_version \* 100 + $ft_min_micro_version`
    if test $ft_config_version -lt $ft_min_version ; then
      ifelse([$3], , :, [$3])
    else
      ac_save_CFLAGS="$CFLAGS"
      ac_save_LIBS="$LIBS"
      CFLAGS="$CFLAGS $FT2_CFLAGS"
      LIBS="$FT2_LIBS $LIBS"
dnl
dnl Sanity checks the results of freetype-config to some extent
dnl
      AC_TRY_RUN([
#include <ft2build.h>
#include FT_FREETYPE_H
#include <stdio.h>
#include <stdlib.h>

int 
main ()
{
    FT_Library library;
    FT_Error error;

    error = FT_Init_FreeType( &library );

    if ( error )
    {
        return 1;
    } else {
        FT_Done_FreeType( library );
        return 0;
    }
}
],, no_ft=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
      CFLAGS="$ac_save_CFLAGS"
      LIBS="$ac_save_LIBS"
    fi             # test $ft_config_version -lt $ft_min_version
  fi               # test "x$enable_fttest" = "xyes"
fi                 # test "$FT2_CONFIG" = "no"
if test "x$no_ft" = x ; then
   AC_MSG_RESULT(yes)
   ifelse([$2], , :, [$2])     
else
   AC_MSG_RESULT(no)
   if test "$FT2_CONFIG" = "no" ; then
     echo "*** The freetype-config script installed by FT2 could not be found"
     echo "*** If FT2 was installed in PREFIX, make sure PREFIX/bin is in"
     echo "*** your path, or set the FT2_CONFIG environment variable to the"
     echo "*** full path to freetype-config."
   else
     echo "*** The FreeType test program failed to run.  If your system uses"
     echo "*** shared libraries and they are installed outside the normal"
     echo "*** system library path, make sure the variable LD_LIBRARY_PATH"
     echo "*** (or whatever is appropiate for your system) is correctly set."
   fi
   FT2_CFLAGS=""
   FT2_LIBS=""
   ifelse([$3], , :, [$3])
fi
AC_SUBST(FT2_CFLAGS)
AC_SUBST(FT2_LIBS)
])