configure.ac - platform/external/flex - Git at Google

 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.

 # This file is part of flex.

 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:

 # 1. Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 # 2. Redistributions in binary form must reproduce the above copyright
 # notice, this list of conditions and the following disclaimer in the
 # documentation and/or other materials provided with the distribution.

 # Neither the name of the University nor the names of its contributors
 # may be used to endorse or promote products derived from this software
 # without specific prior written permission.

 # THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 # PURPOSE.

 # autoconf requirements and initialization

 AC_INIT([the fast lexical analyser generator],[2.6.3],[flex-help@lists.sourceforge.net],[flex])
 AC_CONFIG_SRCDIR([src/scan.l])
 AC_CONFIG_AUX_DIR([build-aux])
 LT_INIT
 AM_INIT_AUTOMAKE([-Wno-portability foreign check-news std-options dist-lzip parallel-tests 1.14.1])
 AC_CONFIG_HEADER([src/config.h])
 AC_CONFIG_LIBOBJ_DIR([lib])
 AC_CONFIG_MACRO_DIR([m4])
 SHARED_VERSION_INFO="2:0:0"
 AC_SUBST(SHARED_VERSION_INFO)

 # checks for programs

 AM_GNU_GETTEXT([external])
 AM_GNU_GETTEXT_VERSION([0.19])
 AC_PROG_YACC
 AM_PROG_LEX
 AC_PROG_CC
 AC_PROG_CXX
 AM_PROG_CC_C_O
 AC_PROG_LN_S
 AC_PROG_AWK
 AC_PROG_INSTALL

 # allow passing a variable `WARNINGFLAGS',
 #   either when invoking `configure', or when invoking `make'
 # default to something useful if GCC was detected

 AC_ARG_ENABLE([warnings],
   [AS_HELP_STRING([--enable-warnings],
                   [enable a bunch of compiler warning flags (defaults to GCC warning flags).])],
   [AS_IF([test "x$GCC" == xyes],
     [ : ${WARNINGFLAGS="-Wall -Wextra -Wmissing-prototypes -Wstrict-prototypes -Wnested-externs -Wold-style-definition -Wredundant-decls -Wconversion -Wno-unused-but-set-variable"} ])])

 AC_SUBST([WARNINGFLAGS])

 AC_PATH_PROG([BISON], bison, no)
 AS_IF([test "$BISON" != no],[],
 	[ AC_SUBST([BISON], [\${top_srcdir}/build-aux/missing bison])
 	  AC_MSG_NOTICE(no bison program found: only required for maintainers)
 	])

 AC_PATH_PROG([HELP2MAN], help2man, [\${top_srcdir}/build-aux/missing help2man])
   AS_IF([test -z "$ac_cv_path_HELP2MAN" ],[],
     AC_MSG_WARN(program not found: help2man: building man page will not work)
   )

 AC_PATH_PROGS([TEXI2DVI], [gtexi2dvi texi2dvi], [\${top_srcdir}/build-aux/missing texi2dvi])
   AS_IF([test -z "$ac_cv_path_TEXI2DVI" ], [],
     AC_MSG_WARN(texi2dvi: program not found: building pdf version of manual will not work)
   )

 # Check for a m4 that supports -P

 AC_CACHE_CHECK([for m4 that supports -P], [ac_cv_path_M4],
 [AC_PATH_PROGS_FEATURE_CHECK([M4], [gm4 gnum4 m4],
               [[m4out=`echo 'm''4_divnum' | $ac_path_M4 -P`]
                 [test "x$m4out" = x0 \
                 && ac_cv_path_M4=$ac_path_M4 ac_path_M4_found=:]],
               [AC_MSG_ERROR([could not find m4 that supports -P])])])
 AC_SUBST([M4], [$ac_cv_path_M4])
 AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the m4 executable name.])

 AC_PATH_PROG(INDENT, indent, indent)
 # if INDENT is set to 'indent' then we didn't find indent
 if test "$INDENT" != indent ; then
    AC_MSG_CHECKING(if $INDENT is GNU indent)
    if $INDENT --version 2>/dev/null | head -n 1|grep "GNU indent" > /dev/null ; then
       AC_MSG_RESULT(yes)
    else
       AC_MSG_RESULT(no)
       AC_MSG_WARN($INDENT does not appear to be GNU indent.)
    fi
 else
    AC_MSG_WARN(no indent program found: make indent target will not function)
 fi

 # checks for headers

 AC_CHECK_HEADERS([inttypes.h libintl.h limits.h locale.h malloc.h netinet/in.h regex.h unistd.h])

 # checks for libraries

 # The test test-pthread uses libpthread, so we check for it here, but
 # all we need is the preprocessor symbol defined since we don't need
 # LIBS to include libpthread for building flex.

 AC_CHECK_LIB(pthread, pthread_mutex_lock,
 AC_DEFINE([HAVE_LIBPTHREAD], 1, [pthread library] ),
 AC_DEFINE([HAVE_LIBPTHREAD], 0, [pthread library] )
 )
 AC_CHECK_HEADERS([pthread.h])
 AM_CONDITIONAL([want_pthread], [test x$ac_cv_lib_pthread_pthread_mutex_lock = xyes])

 AC_CHECK_LIB(m, log10)

 # Checks for typedefs, structures, and compiler characteristics.

 AC_HEADER_STDBOOL
 AC_C_CONST
 AC_TYPE_SIZE_T

 # Checks for library functions.

 AC_FUNC_ALLOCA
 AC_FUNC_FORK
 AC_FUNC_MALLOC
 AC_FUNC_REALLOC

 AC_CHECK_FUNCS(dup2 dnl
 memset dnl
 pow dnl
 regcomp dnl
 setlocale dnl
 strchr dnl
 strdup dnl
 strtol)

 AC_REPLACE_FUNCS(reallocarray)

 AC_CONFIG_FILES(
 Makefile
 doc/Makefile
 examples/Makefile
 examples/fastwc/Makefile
 examples/manual/Makefile
 lib/Makefile
 po/Makefile.in
 src/Makefile
 tools/Makefile
 tests/Makefile
 )

 AC_OUTPUT
	# -- Autoconf --
	# Process this file with autoconf to produce a configure script.

	# This file is part of flex.

	# Redistribution and use in source and binary forms, with or without
	# modification, are permitted provided that the following conditions
	# are met:

	# 1. Redistributions of source code must retain the above copyright
	# notice, this list of conditions and the following disclaimer.
	# 2. Redistributions in binary form must reproduce the above copyright
	# notice, this list of conditions and the following disclaimer in the
	# documentation and/or other materials provided with the distribution.

	# Neither the name of the University nor the names of its contributors
	# may be used to endorse or promote products derived from this software
	# without specific prior written permission.

	# THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	# IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	# PURPOSE.

	# autoconf requirements and initialization

	AC_INIT([the fast lexical analyser generator],[2.6.3],[flex-help@lists.sourceforge.net],[flex])
	AC_CONFIG_SRCDIR([src/scan.l])
	AC_CONFIG_AUX_DIR([build-aux])
	LT_INIT
	AM_INIT_AUTOMAKE([-Wno-portability foreign check-news std-options dist-lzip parallel-tests 1.14.1])
	AC_CONFIG_HEADER([src/config.h])
	AC_CONFIG_LIBOBJ_DIR([lib])
	AC_CONFIG_MACRO_DIR([m4])
	SHARED_VERSION_INFO="2:0:0"
	AC_SUBST(SHARED_VERSION_INFO)

	# checks for programs

	AM_GNU_GETTEXT([external])
	AM_GNU_GETTEXT_VERSION([0.19])
	AC_PROG_YACC
	AM_PROG_LEX
	AC_PROG_CC
	AC_PROG_CXX
	AM_PROG_CC_C_O
	AC_PROG_LN_S
	AC_PROG_AWK
	AC_PROG_INSTALL

	# allow passing a variable `WARNINGFLAGS',
	# either when invoking `configure', or when invoking `make'
	# default to something useful if GCC was detected

	AC_ARG_ENABLE([warnings],
	[AS_HELP_STRING([--enable-warnings],
	[enable a bunch of compiler warning flags (defaults to GCC warning flags).])],
	[AS_IF([test "x$GCC" == xyes],
	[ : ${WARNINGFLAGS="-Wall -Wextra -Wmissing-prototypes -Wstrict-prototypes -Wnested-externs -Wold-style-definition -Wredundant-decls -Wconversion -Wno-unused-but-set-variable"} ])])

	AC_SUBST([WARNINGFLAGS])

	AC_PATH_PROG([BISON], bison, no)
	AS_IF([test "$BISON" != no],[],
	[ AC_SUBST([BISON], [\${top_srcdir}/build-aux/missing bison])
	AC_MSG_NOTICE(no bison program found: only required for maintainers)
	])

	AC_PATH_PROG([HELP2MAN], help2man, [\${top_srcdir}/build-aux/missing help2man])
	AS_IF([test -z "$ac_cv_path_HELP2MAN" ],[],
	AC_MSG_WARN(program not found: help2man: building man page will not work)
	)

	AC_PATH_PROGS([TEXI2DVI], [gtexi2dvi texi2dvi], [\${top_srcdir}/build-aux/missing texi2dvi])
	AS_IF([test -z "$ac_cv_path_TEXI2DVI" ], [],
	AC_MSG_WARN(texi2dvi: program not found: building pdf version of manual will not work)
	)

	# Check for a m4 that supports -P

	AC_CACHE_CHECK([for m4 that supports -P], [ac_cv_path_M4],
	[AC_PATH_PROGS_FEATURE_CHECK([M4], [gm4 gnum4 m4],
	[[m4out=`echo 'm''4_divnum' \| $ac_path_M4 -P`]
	[test "x$m4out" = x0 \
	&& ac_cv_path_M4=$ac_path_M4 ac_path_M4_found=:]],
	[AC_MSG_ERROR([could not find m4 that supports -P])])])
	AC_SUBST([M4], [$ac_cv_path_M4])
	AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the m4 executable name.])

	AC_PATH_PROG(INDENT, indent, indent)
	# if INDENT is set to 'indent' then we didn't find indent
	if test "$INDENT" != indent ; then
	AC_MSG_CHECKING(if $INDENT is GNU indent)
	if $INDENT --version 2>/dev/null \| head -n 1\|grep "GNU indent" > /dev/null ; then
	AC_MSG_RESULT(yes)
	else
	AC_MSG_RESULT(no)
	AC_MSG_WARN($INDENT does not appear to be GNU indent.)
	fi
	else
	AC_MSG_WARN(no indent program found: make indent target will not function)
	fi

	# checks for headers

	AC_CHECK_HEADERS([inttypes.h libintl.h limits.h locale.h malloc.h netinet/in.h regex.h unistd.h])

	# checks for libraries

	# The test test-pthread uses libpthread, so we check for it here, but
	# all we need is the preprocessor symbol defined since we don't need
	# LIBS to include libpthread for building flex.

	AC_CHECK_LIB(pthread, pthread_mutex_lock,
	AC_DEFINE([HAVE_LIBPTHREAD], 1, [pthread library] ),
	AC_DEFINE([HAVE_LIBPTHREAD], 0, [pthread library] )
	)
	AC_CHECK_HEADERS([pthread.h])
	AM_CONDITIONAL([want_pthread], [test x$ac_cv_lib_pthread_pthread_mutex_lock = xyes])

	AC_CHECK_LIB(m, log10)

	# Checks for typedefs, structures, and compiler characteristics.

	AC_HEADER_STDBOOL
	AC_C_CONST
	AC_TYPE_SIZE_T

	# Checks for library functions.

	AC_FUNC_ALLOCA
	AC_FUNC_FORK
	AC_FUNC_MALLOC
	AC_FUNC_REALLOC

	AC_CHECK_FUNCS(dup2 dnl
	memset dnl
	pow dnl
	regcomp dnl
	setlocale dnl
	strchr dnl
	strdup dnl
	strtol)

	AC_REPLACE_FUNCS(reallocarray)

	AC_CONFIG_FILES(
	Makefile
	doc/Makefile
	examples/Makefile
	examples/fastwc/Makefile
	examples/manual/Makefile
	lib/Makefile
	po/Makefile.in
	src/Makefile
	tools/Makefile
	tests/Makefile
	)

	AC_OUTPUT