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On older libc, _POSIX_C_SOURCE didn't satisfy to use posix_fadvise()
and AC_CHECK_FUNCS doesn't check a header file if the function is
declared there properly. so use AC_LINK_IFELSE instead.

Check if libxml2 has built with --with-sax1

It's introduced by 0ac6c982.
Use lstat() and S_ISDIR() to check if it's the directory or not
if there are no d_type in struct dirent.

Keith Packard authored May 01, 2012 and Akira TAGOH committed May 02, 2012

Commit 87d7b82a

 reformatted this
part of the configure script, accidentally introducing a spurious
comma.
Signed-off-by: Keith Packard <keithp@keithp.com>

Stop using mmap() if the cache file is stored on NFS.
also added FONTCONFIG_USE_MMAP environment variable to enforce the use of
or not the use of mmap(2) regardless of what the filesystem the cache files
are stored on.

Disable iconv support by default, which provide a feature to convert
non-Unicode SFNT names to UTF-8.

Reported by Jon TURNEY

Keith Packard authored Apr 16, 2012 and Akira TAGOH committed Apr 17, 2012

Given that fontconfig will scan all of the cache file data during the
first font search, ask the kernel to start reading the pages right away.
Signed-off-by: Keith Packard <keithp@keithp.com>

Fix a build issue on the platforms where regex isn't available

Allow :file=/path/to/font/file on matching

Add --with-libiconv, --with-libiconv-includes and --with-libiconv-lib
to specify the directory where libiconv might be installed.

Add configure options to set the directory to be installed:
  --with-templatedir for the configuration files a.k.a.
    /etc/fonts/conf.avail
  --with-baseconfigdir for fonts.conf etc a.k.a. /etc/fonts
  --with-configdir for the active configuration files a.k.a.
    /etc/fonts/conf.d
  --with-xmldir for fonts.dtd etc

and the default path for templatedir is changed to
${datadir}/fontconfig/conf.avail

$< isn't supported in BSD make say. $(RM) is pre-defined in GNU make
though, not in BSD make say. so changed to check on configure if it's
pre-defined by make, otherwise set the appropriate command to $(RM).

This would be a workaround until it has the certain pre-defined value.

Use the own random number generator state if possible.

That macro is simply broken.

This was also brought up in:
Bug 32679 - fontconfig-2.8.0 does not cross compile

Fixes:
Bug 32679 - fontconfig-2.8.0 does not cross compile
Bug 25462 - Cross-compilation doesn't work

Remove dolt.  With libtool2, there's not much need for dolt.