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elinks/config/m4/features.m4

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dnl ===================================================================
dnl Macros for various checks
dnl ===================================================================
dnl TODO: Make EL_CONFIG* macros assume CONFIG_* defines so it is possible
dnl to write EL_CONFIG_DEPENDS(SCRIPTING, [GUILE LUA PERL], [...])
dnl EL_CONFIG(define, what)
AC_DEFUN([EL_CONFIG], [
$1=yes
ABOUT_$1="$2"
AC_DEFINE($1, 1, [Define if you want: $2 support])])
dnl EL_LOG_CONFIG(define, description, value)
dnl The first parameter (define) will not be expanded by m4,
dnl and it must be a valid name for a shell variable.
AC_DEFUN([EL_LOG_CONFIG],
[
about="$2"
value="$3"
[msgdots2="`echo $about | sed 's/[0-9]/./g'`"]
[msgdots1="`echo $msgdots2 | sed 's/[a-z]/./g'`"]
[msgdots0="`echo $msgdots1 | sed 's/[A-Z]/./g'`"]
[msgdots="`echo $msgdots0 | sed 's/[-_ ()]/./g'`"]
DOTS="................................"
dots=`echo $DOTS | sed "s/$msgdots//"`
# $msgdots too big?
if test "$dots" = "$DOTS"; then
dots=""
fi
if test -z "$value"; then
value="$[$1]"
fi
echo "$about $dots $value" >> features.log
AC_SUBST([$1])
])
dnl EL_CONFIG_DEPENDS(define, CONFIG_* dependencies, what)
AC_DEFUN([EL_CONFIG_DEPENDS],
[
$1=no
el_value=
for dependency in $2; do
# Hope this is portable?!? --jonas
eval el_config_value=$`echo $dependency`
if test "$el_config_value" = yes; then
el_about_dep=$`echo ABOUT_$dependency`
eval depvalue=$el_about_dep
if test -z "$el_value"; then
el_value="$depvalue"
else
el_value="$el_value, $depvalue"
fi
$1=yes
fi
done
if test "[$]$1" = yes; then
EL_CONFIG($1, [$3])
fi
EL_LOG_CONFIG([$1], [$3], [$el_value])
])
dnl EL_ARG_ENABLE(define, name, conf-help, arg-help)
AC_DEFUN([EL_ARG_ENABLE],
[
AC_ARG_ENABLE($2, [$4],
[
if test "$enableval" != no; then enableval="yes"; fi
$1="$enableval";
])
if test "x[$]$1" = xyes; then
EL_CONFIG($1, [$3])
else
$1=no
fi
EL_LOG_CONFIG([$1], [$3], [])
])
dnl EL_ARG_DEPEND(define, name, depend, conf-help, arg-help)
AC_DEFUN([EL_ARG_DEPEND],
[
AC_ARG_ENABLE($2, [$5],
[
if test "$enableval" != no; then enableval="yes"; fi
$1="$enableval"
])
ENABLE_$1="[$]$1";
if test "x[$]$1" = xyes; then
# require all dependencies to be met
for dependency in $3; do
el_name=`echo "$dependency" | sed 's/:.*//'`;
el_arg=`echo "$dependency" | sed 's/.*://'`;
# Hope this is portable?!? --jonas
eval el_value=$`echo $el_name`;
if test "x$el_value" != "x$el_arg"; then
ENABLE_$1=no;
break;
fi
done
if test "[$]ENABLE_$1" = yes; then
EL_CONFIG($1, [$4])
else
$1=no;
fi
else
$1=no;
fi
EL_LOG_CONFIG([$1], [$4], [])
])
dnl EL_DEFINE(define, what)
AC_DEFUN([EL_DEFINE], [AC_DEFINE($1, 1, [Define if you have $2])])
dnl EL_CHECK_CODE(type, define, includes, code)
AC_DEFUN([EL_CHECK_CODE],
[
$2=yes;
AC_MSG_CHECKING([for $1])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[$3]], [[$4]])],[EL_DEFINE($2, [$1])],[$2=no])
AC_MSG_RESULT([$]$2)
])
dnl EL_CHECK_TYPE(type, default)
AC_DEFUN([EL_CHECK_TYPE],
[
EL_CHECK_TYPE_LOCAL=yes;
AC_MSG_CHECKING([for $1])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
]], [[int a = sizeof($1);]])],[EL_CHECK_TYPE_LOCAL=yes],[EL_CHECK_TYPE_LOCAL=no])
AC_MSG_RESULT([$]EL_CHECK_TYPE_LOCAL)
if test "x[$]EL_CHECK_TYPE_LOCAL" != "xyes"; then
AC_DEFINE($1, $2, [Define to $2 if <sys/types.h> doesn't define.])
fi
])
dnl EL_CHECK_SYS_TYPE(type, define, includes)
AC_DEFUN([EL_CHECK_SYS_TYPE],
[
EL_CHECK_CODE([$1], [$2], [
#include <sys/types.h>
$3
], [int a = sizeof($1);])
])
dnl EL_CHECK_NET_TYPE(type, define, include)
AC_DEFUN([EL_CHECK_NET_TYPE],
[
EL_CHECK_SYS_TYPE([$1], [$2], [
#include<sys/socket.h>
$3
])
])
dnl EL_CHECK_INT_TYPE(type, define)
AC_DEFUN([EL_CHECK_INT_TYPE],
[
EL_CHECK_SYS_TYPE([$1], [$2], [
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
])
])
dnl Save and restore the current build flags
AC_DEFUN([EL_SAVE_FLAGS],
[
CFLAGS_X="$CFLAGS";
CPPFLAGS_X="$CPPFLAGS";
LDFLAGS_X="$LDFLAGS";
LIBS_X="$LIBS";
])
AC_DEFUN([EL_RESTORE_FLAGS],
[
CFLAGS="$CFLAGS_X";
CPPFLAGS="$CPPFLAGS_X";
LDFLAGS="$LDFLAGS_X";
LIBS="$LIBS_X";
])