configure.ac

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

AC_INIT([patchutils],[0.4.2])
AC_CONFIG_SRCDIR(patchutils.spec.in)
AC_CONFIG_HEADERS(config.h)

AM_INIT_AUTOMAKE([dist-xz dist-bzip2 subdir-objects 1.6])

dnl Checks for programs.
AC_PROG_CC
AM_PROG_CC_C_O
AC_PROG_CPP
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_MAKE_SET
AC_PROG_RANLIB
AC_PATH_PROG([XMLTO], [xmlto])
AM_CONDITIONAL(HAVE_XMLTO, test x$XMLTO != x)
if test x$XMLTO = x; then
  AC_MSG_WARN([xmlto not available so not building docs])
fi

dnl Checks for perl, for the scripts
AC_PATH_PROGS(PERL, perl perl5)

dnl Find a default editor
AC_CHECK_PROGS(DEFAULT_EDITOR, sensible-editor editor vim vi, vi)

CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
if test x"$GCC" = xyes; then
	CFLAGS="$CFLAGS -Wall"
fi

dnl Checks for libraries.

dnl Checks for header files.
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS(sys/types.h unistd.h error.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_PID_T
AC_TYPE_SIZE_T

dnl Checks for library functions.
AC_FUNC_ALLOCA
AC_FUNC_FNMATCH
AC_CHECK_FUNCS(strcspn strspn strtoul getline error)

AC_CONFIG_LIBOBJ_DIR([src])

dnl Check for long getopt
AC_CHECK_FUNCS(getopt_long , , [
  AC_LIBOBJ([getopt])
  AC_LIBOBJ([getopt1])
])

dnl Check pcre2 availability
AC_MSG_CHECKING([whether PCRE2 support is requested])
AC_ARG_WITH([pcre2],
            [AS_HELP_STRING([--with-pcre2],
                            [use pcre2 regex library @<:@default=check@:>@])],
            [], [with_pcre2=check])
LIBPCRE2=
AS_IF([test "x$with_pcre2" != xno],
      [
       AC_MSG_RESULT($with_pcre2)
       AC_CHECK_HEADERS([pcre2posix.h], [], [LIBPCRE2=_missing_header])
       AC_CHECK_LIB([pcre2-posix${LIBPCRE2}], [regexec],
                    [],
                    [if test "x$with_pcre2" != xcheck; then
                     AC_MSG_FAILURE(
                       [--with-pcre2 was given, but test for pcre2-posix failed])
                     fi]
                    )
      ],
      AC_MSG_RESULT(no)
)

dnl Check diff/patch programs
AC_MSG_CHECKING(for diff program)
DIFF=diff
AC_ARG_WITH(diff, [  --with-diff=DIFF        name of the diff program],
  DIFF=$withval)
AC_MSG_RESULT($DIFF)

PATCH=patch
AC_MSG_CHECKING(for patch program)
AC_ARG_WITH(patch, [  --with-patch=PATCH      name of the patch program],
  PATCH=$withval)
AC_MSG_RESULT($PATCH)

AC_MSG_CHECKING(whether patch works)
pver=`$PATCH -v 2>&1`
if echo "$pver" | grep -q "version 2.0" > /dev/null 2>&1; then
   AC_MSG_ERROR([no

Sorry, you have version 2.0 of the patch program, which
is not supported by interdiff.  Please upgrade.
])
fi
AC_MSG_RESULT(yes)

AC_DEFINE_UNQUOTED(PATCH, "$PATCH", How patch(1) is called)
AC_DEFINE_UNQUOTED(DIFF, "$DIFF", How diff(1) is called)

AC_CONFIG_FILES([
Makefile
scripts/splitdiff
scripts/editdiff
scripts/fixcvsdiff
scripts/recountdiff
scripts/unwrapdiff
scripts/dehtmldiff
scripts/espdiff
patchutils.spec
])
AC_OUTPUT