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kconfig-frontends/configure.ac
Clement Chauplannaz 7c03674c19 Configure: check for lex/yacc availability in path 
Autoconf provides macros to check for `Particular programs'. Among
those are `lex' and `yacc' families of programs. When the relevant
macro is used, autoconf will look for a list of programs in the PATH,
perform execution check of the programs found, and set the associated
variable to the best possible match (for example, `flex' has precedence
over `lex').

The problem comes from the behavior of those two macros when no match
is found in the PATH: associated variables are set to a default value
and no further check is performed. This can lead to running ./configure
successfully and encountering an obfuscated error during compilation
for the output of `lex' and `yacc' could not be produced and fed to
the compiler.

This patch adds checks on the result of autoconf macros, and aborts
./configure execution if needed.

Signed-off-by: Clement Chauplannaz <chauplac@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
2013-05-11 21:48:27 +02:00

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# -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.
#---------------------------------------------------------------------------
# Global initialisation
#----------------------------------------
# Prepare autoconf
AC_PREREQ([2.67])
AC_INIT(
[kconfig-frontends],
[m4_esyscmd_s([./scripts/version.sh])],
[yann.morin.1998@free.fr])
AC_CONFIG_SRCDIR([frontends/conf/conf.c])
# Use a config.h to avoid brazilions -DHAVE_FOO on compile lines
AC_CONFIG_HEADERS([scripts/.autostuff/config.h])
AC_CONFIG_AUX_DIR([scripts/.autostuff/scripts])
AC_CONFIG_MACRO_DIR([scripts/.autostuff/m4])
#----------------------------------------
# Prepare automake
# We want to allow the user to override our default program-prefix,
# so we must set-it now, before automake has a chance to interpret
# it, but after the options are parsed, so as not to overwrite the
# value (if any) set by the user
AS_IF(
[test "$program_prefix" = NONE],
[program_prefix=kconfig-])
AM_INIT_AUTOMAKE([foreign])
# For releases, enable silent rules, unless the user explicitly
# disables them.
# For the devel tree, do build with verbose output, unless user
# explicitly enables silent rules
AS_IF(
[test "$(${srcdir}/scripts/version.sh --internal)" = "git"],
[AM_SILENT_RULES],
[AM_SILENT_RULES([yes])])
AS_IF(
[test $AM_DEFAULT_VERBOSITY -eq 0],
[SILENT_MAKEFLAGS="--no-print-directory -s"],
[SILENT_MAKEFLAGS=""])
AC_SUBST([SILENT_MAKEFLAGS])
#----------------------------------------
# Prepare libtool
m4_ifdef([AM_PROG_AR], [AM_PROG_AR]) dnl Automake, we have a problem...
LT_PREREQ([2.2.6])
LT_INIT([disable-static])
#---------------------------------------------------------------------------
# Set misc options
# By default, do build with -Wall, unless the user asks not to
[wall_CFLAGS=-Wall]
AC_ARG_ENABLE(
[wall],
[AS_HELP_STRING(
[--disable-wall],
[build with -Wall (default=yes)])],
[AS_CASE(
["$enableval"],
[yes], [wall_CFLAGS=-Wall],
[*], [wall_CFLAGS=""])])
AC_SUBST([wall_CFLAGS],[${wall_CFLAGS}])
# For releases, do not build with -Werror, unless the user explicitly
# requests to build with -Werror.
# For the devel tree, do build with -Werror by default, unless user
# explicitly disables -Werror
AS_IF(
[test "$(${srcdir}/scripts/version.sh --internal)" = "git"],
[werror_CFLAGS=-Werror])
AC_ARG_ENABLE(
[werror],
[AS_HELP_STRING(
[--enable-werror],
[build with -Werror (default=no)])],
[AS_CASE(
["$enableval"],
[yes], [werror_CFLAGS=-Werror],
[*], [werror_CFLAGS=""])])
AC_SUBST([werror_CFLAGS],[${werror_CFLAGS}])
# Although there is a default (="linux") in the code, we do provide
# a default here, to get a consistent autostuff behavior
AC_ARG_ENABLE(
[root-menu-prompt],
[AS_HELP_STRING(
[--enable-root-menu-prompt=PROMPT],
[set the root-menu prompt (default=Configuration)])],
[AS_CASE(
["$enableval"],
[yes], [root_menu=Configuration],
[no], [root_menu=],
[# Escape the $ signs, otherwise they would get munged by make
root_menu="$( echo "$enableval" |sed -e 's/\$/\\$$/g;' )"])])
AC_SUBST([root_menu], [${root_menu=Configuration}])
AC_ARG_ENABLE(
[config-prefix],
[AS_HELP_STRING(
[--enable-config-prefix=PREFIX],
[the prefix to the config option (default=CONFIG_)])],
[AS_CASE(
["$enableval"],
[*" "*],[AC_MSG_ERROR([config prefix can not contain spaces: '$enableval'])],
[yes], [config_prefix=CONFIG_],
[no], [config_prefix=],
[config_prefix=$enableval])])
AC_SUBST([config_prefix], [${config_prefix-CONFIG_}])
AC_ARG_ENABLE(
[utils],
[AS_HELP_STRING(
[--disable-utils],
[install utilities to manage .config files (default=yes)])])
AC_SUBST([enable_utils], [${enable_utils:-yes}])
AC_ARG_ENABLE(
[L10n],
[AS_HELP_STRING(
[--disable-L10n],
[enable localisation (L10n) (default=auto)])])
AC_SUBST([enable_L10n], [${enable_L10n:-yes}])
#----------------------------------------
# Options to selectively enable/disable frontends
# All are selected by default
AC_ARG_ENABLE(
[conf],
[AS_HELP_STRING(
[--disable-conf],
[conf, the stdin-based frontend (default=auto)])])
AC_SUBST([enable_conf], [${enable_conf:-auto}])
AC_ARG_ENABLE(
[mconf],
[AS_HELP_STRING(
[--disable-mconf],
[mconf, the traditional ncurses-based frontend (default=auto)])])
AC_SUBST([enable_mconf], [${enable_mconf:-auto}])
AC_ARG_ENABLE(
[nconf],
[AS_HELP_STRING(
[--disable-nconf],
[nconf, the modern ncurses-based frontend (default=auto)])])
AC_SUBST([enable_nconf], [${enable_nconf:-auto}])
AC_ARG_ENABLE(
[gconf],
[AS_HELP_STRING(
[--disable-gconf],
[gconf, the GTK-based frontend (default=auto)])])
AC_SUBST([enable_gconf], [${enable_gconf:-auto}])
AC_ARG_ENABLE(
[qconf],
[AS_HELP_STRING(
[--disable-qconf],
[qconf, the QT-based frontend (default=auto)])])
AC_SUBST([enable_qconf], [${enable_qconf:-auto}])
AC_ARG_ENABLE(
[frontends],
[AS_HELP_STRING(
[--enable-frontends=list],
[enables only the set of frontends in comma-separated 'list'
(default: auto selection), takes precedence over all
--enable-*conf, above])],
[for f in conf mconf nconf gconf qconf; do
AS_CASE(
["$enableval"],
[yes], [eval enable_$f=yes],
["$f"], [eval enable_$f=yes],
["$f",*], [eval enable_$f=yes],
[*,"$f"], [eval enable_$f=yes],
[*,"$f",*], [eval enable_$f=yes],
[eval enable_$f=no])
done])
AC_SUBST([enable_frontends])
#----------------------------------------
# What extra CFLAGS we will be using
AC_SUBST([kf_CFLAGS], ["$wall_CFLAGS $werror_CFLAGS"])
#----------------------------------------
# Dependencies that will be needed, depending on the frontends
AS_CASE(
["$enable_mconf":"$enable_nconf"],
[*yes*], [need_curses=yes],
[*auto*], [need_curses=auto],
[need_curses=no])
[need_panel_menu="$enable_nconf"]
AS_CASE(
["$enable_gconf":"$enable_qconf"],
[*yes*], [need_pkgconfig=yes],
[*auto*], [need_pkgconfig=yes],
[need_pkgconfig=no ])
[need_gtk="$enable_gconf"]
[need_qt="$enable_qconf"]
#---------------------------------------------------------------------------
# Now check we have the required stuff
#----------------------------------------
# Some program checks
AC_PROG_CC
AM_PROG_CC_C_O
AC_PROG_CXX
AC_C_INLINE
AC_PROG_MAKE_SET
AC_CHECK_PROGS(
[GPERF],
[gperf])
AS_IF(
[test -z "$GPERF"],
[AC_MSG_ERROR([can not find gperf])])
AS_IF(
[test "$need_pkgconfig" = "yes"],
[PKG_PROG_PKG_CONFIG()])
# Look for `lex'. If it cannot be found, autoconf sets $LEX to ':'.
AC_PROG_LEX
AS_IF(
[test "$LEX" = ":"],
[AC_MSG_ERROR([can not find a lexer generator (such as lex or flex)])])
AC_SUBST([AM_LFLAGS], ["-L -P zconf"])
# Look for `yacc'. If it cannot be found, autoconf sets $YACC to 'yacc'.
AC_PROG_YACC
AS_IF(
[test "$YACC" = "yacc"],
[AC_CHECK_PROGS(
[YACC_IN_PATH],
[yacc])]
AS_IF(
[test -z "$YACC_IN_PATH"],
[AC_MSG_ERROR([can not find a parser generator (such as yacc or bison)])]))
AC_SUBST([AM_YFLAGS], ["-t -l -p zconf"])
#----------------------------------------
# Check for gettext, for the kconfig frontends
[has_gettext="$enable_L10n"]
AS_IF(
[test "$has_gettext" = "yes"],
[AC_CHECK_HEADERS(
[libintl.h],
[ac_ct_gettext_hdr=$ac_header; break],
[has_gettext=no])])
AS_IF(
[test "$has_gettext" = "yes"],
[AC_CHECK_DECL(
[gettext],,
[has_gettext=no],
[#include <$ac_ct_gettext_hdr>])])
AS_IF(
[test "$has_gettext" = "yes"],
[LIBS_old="$LIBS"
LIBS=
AC_SEARCH_LIBS(
[gettext],
[intl],,
[has_gettext=no])
intl_LIBS="$LIBS"
LIBS="$LIBS_old"])
AS_IF(
[test "$has_gettext" = "no"],
[intl_CPPFLAGS=-DKBUILD_NO_NLS])
AC_SUBST([intl_CPPFLAGS])
AC_SUBST([intl_LIBS])
#----------------------------------------
# Check for ncurses, for the mconf & nconf frontends
AS_IF(
[test "$need_curses" = "yes" -o "$need_curses" = "auto"],
[AC_SUBST([ncurses_mconf_CPPFLAGS])
AC_SUBST([ncurses_LIBS])
LIBS_old="$LIBS"
LIBS=
AC_CHECK_HEADERS(
[ncursesw/curses.h ncurses/ncurses.h ncurses/curses.h ncurses.h curses.h],
[CURSES_LOC=$ac_header; ncurses_mconf_CPPFLAGS=-DCURSES_LOC=\\\"$ac_header\\\"; break])
AS_IF(
[test -z "$CURSES_LOC"],
[AS_IF(
[test "$need_curses" = "yes"],
[AC_MSG_ERROR([could not find curses headers (frontends: mconf/nconf)])],
[has_curses=no])])
AS_CASE(
[$CURSES_LOC],
[ncursesw/*],[ncurses_mconf_CPPFLAGS="$ncurses_mconf_CPPFLAGS -DNCURSES_WIDECHAR=1"])
AC_SEARCH_LIBS(
[initscr],
[ncursesw ncurses curses],
[ac_ct_curses_lib_found=yes; break])
AS_IF(
[test -z "$ac_ct_curses_lib_found"],
[AS_IF(
[test "$need_curses" = "yes"],
[AC_MSG_ERROR([could not find curses library (frontends: mconf/nconf)])],
[has_curses=no])])
AC_SEARCH_LIBS(
[setupterm],
[tinfo],
[break])
ncurses_LIBS="$LIBS"
LIBS=$LIBS_old])
AS_IF(
[test "$has_curses" = "no" ],
[enable_mconf=no; enable_nconf=no])
#----------------------------------------
# Check for libpanel and libmenu, for the nconf frontend
AS_IF(
[test "$need_panel_menu" = "yes" -o "$need_panel_menu" = "auto"],
[AC_SUBST([ncurses_nconf_CPPFLAGS])
AC_SUBST([ncurses_panel_menu_LIBS])
AS_CASE(
[$CURSES_LOC],
[ncursesw/*],[ncurses_nconf_CPPFLAGS="-I/usr/include/ncursesw"],
[ncurses/*],[ncurses_nconf_CPPFLAGS="-I/usr/include/ncurses"])
LIBS_old="$LIBS"
LIBS=
AC_SEARCH_LIBS(
[new_panel],
[panelw panel],
[ac_ct_panel_lib_found=yes; break],,
[$ncurses_LIBS])
AS_IF(
[test -z "$ac_ct_panel_lib_found"],
[AS_IF(
[test "$need_panel_menu" = "yes"],
[AC_MSG_ERROR([could not find libpanel library (frontend: nconf)])],
[has_panel_menu=no])])
AC_SEARCH_LIBS(
[menu_init],
[menuw menu],
[ac_ct_menu_lib_found=yes; break],,
[$ncurses_LIBS])
AS_IF(
[test -z "$ac_ct_panel_lib_found"],
[AS_IF(
[test "$need_panel_menu" = "yes"],
[AC_MSG_ERROR([could not find libmenu library (frontend: nconf)])],
[has_panel_menu=no])])
ncurses_panel_menu_LIBS="$LIBS"
LIBS=$LIBS_old])
AS_IF(
[test "$has_panel_menu" = "no" ],
[enable_nconf=no])
#----------------------------------------
# Check headers and libs for gconf
AS_IF(
[test "$need_gtk" = "yes" -o "$need_gtk" = "auto"],
[PKG_CHECK_MODULES(
[gtk],
[gtk+-2.0 gmodule-2.0 libglade-2.0],
[has_gtk=yes],
[AS_IF(
[test "$need_gtk" = "yes"],
[AC_MSG_ERROR([could not find GTK+ headers and/or libraries (frontend: gconf)])],
[has_gtk=no])])])
AS_IF(
[test "$has_gtk" = "no" ],
[enable_gconf=no])
#----------------------------------------
# Check headers and libs for qconf
AS_IF(
[test "$need_qt" = "yes" -o "$need_qt" = "auto"],
[PKG_CHECK_MODULES(
[qt4],
[QtCore QtGui Qt3Support],
[has_qt=yes; need_moc="$need_qt"],
[AS_IF(
[test "$need_qt" = "yes"],
[AC_MSG_ERROR([could not find QT4 headers and/or libraries (frontend: qconf)])],
[has_qt=no; need_moc=no])])])
AC_ARG_VAR([MOC], [Qt meta object compiler (moc) command])
AS_IF(
[test "$need_moc" = "yes" -o "$need_moc" = "auto"],
[QT4_BINDIR=`$PKG_CONFIG Qt --variable bindir`
AC_PATH_PROGS(
[MOC],
[moc-qt4 moc],,
[$QT4_BINDIR:$PATH])
AS_IF(
[test -n "$MOC"],
[has_moc=yes],
[AS_IF(
[test "$need_moc" = "yes"],
[AC_MSG_ERROR([could not find moc (frontend: qconf)])],
[has_moc=no])])])
AS_IF(
[test "$has_qt" = "no" -o "$has_moc" = "no"],
[enable_qconf=no])
#----------------------------------------
# Per-frontends extra libraries
AC_ARG_VAR([conf_EXTRA_LIBS], [Extra libraries to build the conf frontend] )
AC_ARG_VAR([gconf_EXTRA_LIBS], [Extra libraries to build the gconf frontend])
AC_ARG_VAR([mconf_EXTRA_LIBS], [Extra libraries to build the mconf frontend])
AC_ARG_VAR([nconf_EXTRA_LIBS], [Extra libraries to build the nconf frontend])
AC_ARG_VAR([qconf_EXTRA_LIBS], [Extra libraries to build the qconf frontend])
#---------------------------------------------------------------------------
# Now, we know what frontends to enable
AS_IF([test "$enable_conf" = "auto"], [enable_conf=yes ])
AS_IF([test "$enable_gconf" = "auto"], [enable_gconf=yes])
AS_IF([test "$enable_mconf" = "auto"], [enable_mconf=yes])
AS_IF([test "$enable_nconf" = "auto"], [enable_nconf=yes])
AS_IF([test "$enable_qconf" = "auto"], [enable_qconf=yes])
#----------------------------------------
# Check if the lxdialog library should be built
AS_IF(
[test "$enable_mconf" = "yes"],
[need_lxdialog=yes],
[need_lxdialog=no])
#----------------------------------------
# Check if the images library should be built
AS_IF(
[test "$enable_gconf" = "yes" -o "$enable_qconf" = "yes"],
[need_images=yes],
[need_images=no])
#----------------------------------------
# Setup automake conditional build
AM_CONDITIONAL(
[COND_conf],
[test "$enable_conf" = "yes"])
AM_CONDITIONAL(
[COND_mconf],
[test "$enable_mconf" = "yes"])
AM_CONDITIONAL(
[COND_nconf],
[test "$enable_nconf" = "yes"])
AM_CONDITIONAL(
[COND_gconf],
[test "$enable_gconf" = "yes"])
AM_CONDITIONAL(
[COND_qconf],
[test "$enable_qconf" = "yes"])
AM_CONDITIONAL(
[COND_lxdialog],
[test "$need_lxdialog" = "yes"])
AM_CONDITIONAL(
[COND_images],
[test "$need_images" = "yes"])
AM_CONDITIONAL(
[COND_utils],
[test "$enable_utils" = "yes"])
AM_CONDITIONAL(
[COND_utils_gettext],
[test "$has_gettext" = "yes"])
#----------------------------------------
# Get the version to apply to the parser shared library
AC_SUBST(
[KCONFIGPARSER_LIB_VERSION],
[m4_esyscmd_s([./scripts/version.sh --plain])])
#----------------------------------------
# Finalise
AC_CONFIG_FILES([
Makefile
docs/Makefile
libs/Makefile
libs/images/Makefile
libs/lxdialog/Makefile
libs/parser/Makefile
frontends/Makefile
frontends/conf/Makefile
frontends/mconf/Makefile
frontends/nconf/Makefile
frontends/gconf/Makefile
frontends/qconf/Makefile
utils/Makefile
scripts/Makefile
])
AC_OUTPUT
#----------------------------------------
# Pretty-print the configuration settings
[fe_list=]
AS_IF([test "$enable_conf" = "yes"], [fe_list="$fe_list conf" ])
AS_IF([test "$enable_gconf" = "yes"], [fe_list="$fe_list gconf"])
AS_IF([test "$enable_mconf" = "yes"], [fe_list="$fe_list mconf"])
AS_IF([test "$enable_nconf" = "yes"], [fe_list="$fe_list nconf"])
AS_IF([test "$enable_qconf" = "yes"], [fe_list="$fe_list qconf"])
[lib_list=]
AS_IF(
[test "$enable_shared" = "yes"],
[lib_list="$lib_list shared (version: $KCONFIGPARSER_LIB_VERSION)"])
AS_IF(
[test "$enable_static" = "yes"],
[lib_list="$lib_list${lib_list:+,} static"])
AC_MSG_NOTICE()
AC_MSG_NOTICE([Configured with:])
AC_MSG_NOTICE([- parser library :$lib_list])
AC_MSG_NOTICE([ - root-menu prompt : $root_menu])
AC_MSG_NOTICE([ - config prefix : $config_prefix])
AC_MSG_NOTICE([- frontends :$fe_list])
AC_MSG_NOTICE([ - transform name : $program_transform_name])
AC_MSG_NOTICE([ - localised : $has_gettext])
AC_MSG_NOTICE([- install utilities : $enable_utils])
AC_MSG_NOTICE([- CFLAGS CXXFLAGS : $wall_CFLAGS $werror_CFLAGS])
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