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|
dnl #
dnl # Look for a header file in a number of places.
dnl #
dnl # FR_SMART_CHECK_INCLUDE(foo.h, [ #include <other.h> ])
dnl #
AC_DEFUN([FR_SMART_CHECK_INCLUDE], [
ac_safe=`echo "$1" | sed 'y%./+-%__pm%'`
old_CPPFLAGS="$CPPFLAGS"
smart_include=
dnl # The default directories we search in (in addition to the compilers search path)
smart_include_dir="/usr/local/include /opt/include"
dnl # Our local versions
_smart_try_dir=
_smart_include_dir=
dnl # Add variants with the different prefixes and one with no prefix
for _prefix in $smart_prefix ""; do
for _dir in $smart_try_dir; do
_smart_try_dir="${_smart_try_dir} ${_dir}/${_prefix}"
done
for _dir in $smart_include_dir; do
_smart_include_dir="${_smart_include_dir} ${_dir}/${_prefix}"
done
done
dnl #
dnl # Try any user-specified directory first otherwise we may pick up
dnl # the wrong version.
dnl #
if test "x$_smart_try_dir" != "x"; then
for try in $_smart_try_dir; do
AC_MSG_CHECKING([for $1 in $try])
CPPFLAGS="-isystem $try $old_CPPFLAGS"
AC_TRY_COMPILE([$2
#include <$1>],
[int a = 1;],
[
smart_include="-isystem $try"
AC_MSG_RESULT(yes)
break
],
[
smart_include=
AC_MSG_RESULT(no)
])
done
CPPFLAGS="$old_CPPFLAGS"
fi
dnl #
dnl # Try using the default includes (with prefixes).
dnl #
if test "x$smart_include" = "x"; then
for _prefix in $smart_prefix; do
AC_MSG_CHECKING([for ${_prefix}/$1])
AC_TRY_COMPILE([$2
#include <$1>],
[int a = 1;],
[
smart_include="-isystem ${_prefix}/"
AC_MSG_RESULT(yes)
break
],
[
smart_include=
AC_MSG_RESULT(no)
])
done
fi
dnl #
dnl # Try using the default includes (without prefixes).
dnl #
if test "x$smart_include" = "x"; then
AC_MSG_CHECKING([for $1])
AC_TRY_COMPILE([$2
#include <$1>],
[int a = 1;],
[
smart_include=" "
AC_MSG_RESULT(yes)
break
],
[
smart_include=
AC_MSG_RESULT(no)
])
fi
dnl #
dnl # Try to guess possible locations.
dnl #
if test "x$smart_include" = "x"; then
for try in $_smart_include_dir; do
AC_MSG_CHECKING([for $1 in $try])
CPPFLAGS="-isystem $try $old_CPPFLAGS"
AC_TRY_COMPILE([$2
#include <$1>],
[int a = 1;],
[
smart_include="-isystem $try"
AC_MSG_RESULT(yes)
break
],
[
smart_include=
AC_MSG_RESULT(no)
])
done
CPPFLAGS="$old_CPPFLAGS"
fi
dnl #
dnl # Found it, set the appropriate variable.
dnl #
if test "x$smart_include" != "x"; then
eval "ac_cv_header_$ac_safe=yes"
CPPFLAGS="$smart_include $old_CPPFLAGS"
SMART_CPPFLAGS="$smart_include $SMART_CPPFLAGS"
fi
dnl #
dnl # Consume prefix, it's not likely to be used
dnl # between multiple calls.
dnl #
smart_prefix=
])
|
