--- /dev/null
+# libunistring-base.m4 serial 5
+dnl Copyright (C) 2010 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Paolo Bonzini and Bruno Haible.
+
+dnl gl_LIBUNISTRING_MODULE([VERSION], [Module])
+dnl Declares that the source files of Module should be compiled, unless we
+dnl are linking with libunistring and its version is >= the given VERSION.
+dnl Defines an automake conditional LIBUNISTRING_COMPILE_$MODULE that is
+dnl true if the source files of Module should be compiled.
+dnl This macro is to be used for public libunistring API, not for
+dnl undocumented API.
+dnl
+dnl You have to bump the VERSION argument to the next projected version
+dnl number each time you make a change that affects the behaviour of the
+dnl functions defined in Module (even if the sources of Module itself do not
+dnl change).
+
+AC_DEFUN([gl_LIBUNISTRING_MODULE],
+[
+ AC_REQUIRE([gl_LIBUNISTRING_LIB_PREPARE])
+ dnl Use the variables HAVE_LIBUNISTRING, LIBUNISTRING_VERSION from
+ dnl gl_LIBUNISTRING_CORE if that macro has been run.
+ AM_CONDITIONAL(AS_TR_CPP([LIBUNISTRING_COMPILE_$2]),
+ [gl_LIBUNISTRING_VERSION_CMP([$1])])
+])
+
+dnl gl_LIBUNISTRING_LIBHEADER([VERSION], [HeaderFile])
+dnl Declares that HeaderFile should be created, unless we are linking
+dnl with libunistring and its version is >= the given VERSION.
+dnl HeaderFile should be relative to the lib directory and end in '.h'.
+dnl Prepares for substituting LIBUNISTRING_HEADERFILE (to HeaderFile or empty).
+dnl
+dnl When we are linking with the already installed libunistring and its version
+dnl is < VERSION, we create HeaderFile here, because we may compile functions
+dnl (via gl_LIBUNISTRING_MODULE above) that are not contained in the installed
+dnl version.
+dnl When we are linking with the already installed libunistring and its version
+dnl is > VERSION, we don't create HeaderFile here: it could cause compilation
+dnl errors in other libunistring header files if some types are missing.
+dnl
+dnl You have to bump the VERSION argument to the next projected version
+dnl number each time you make a non-comment change to the HeaderFile.
+
+AC_DEFUN([gl_LIBUNISTRING_LIBHEADER],
+[
+ AC_REQUIRE([gl_LIBUNISTRING_LIB_PREPARE])
+ dnl Use the variables HAVE_LIBUNISTRING, LIBUNISTRING_VERSION from
+ dnl gl_LIBUNISTRING_CORE if that macro has been run.
+ if gl_LIBUNISTRING_VERSION_CMP([$1]); then
+ LIBUNISTRING_[]AS_TR_CPP([$2])='$2'
+ else
+ LIBUNISTRING_[]AS_TR_CPP([$2])=
+ fi
+ AC_SUBST([LIBUNISTRING_]AS_TR_CPP([$2]))
+])
+
+dnl Miscellaneous preparations/initializations.
+
+AC_DEFUN([gl_LIBUNISTRING_LIB_PREPARE],
+[
+ dnl Ensure that HAVE_LIBUNISTRING is fully determined at this point.
+ m4_ifdef([gl_LIBUNISTRING], [AC_REQUIRE([gl_LIBUNISTRING])])
+
+ AC_REQUIRE([AC_PROG_AWK])
+
+dnl Sed expressions to extract the parts of a version number.
+changequote(,)
+gl_libunistring_sed_extract_major='/^[0-9]/{s/^\([0-9]*\).*/\1/p;q;}
+i\
+0
+q
+'
+gl_libunistring_sed_extract_minor='/^[0-9][0-9]*[.][0-9]/{s/^[0-9]*[.]\([0-9]*\).*/\1/p;q;}
+i\
+0
+q
+'
+gl_libunistring_sed_extract_subminor='/^[0-9][0-9]*[.][0-9][0-9]*[.][0-9]/{s/^[0-9]*[.][0-9]*[.]\([0-9]*\).*/\1/p;q;}
+i\
+0
+q
+'
+changequote([,])
+
+ if test "$HAVE_LIBUNISTRING" = yes; then
+ LIBUNISTRING_VERSION_MAJOR=`echo "$LIBUNISTRING_VERSION" | sed -n -e "$gl_libunistring_sed_extract_major"`
+ LIBUNISTRING_VERSION_MINOR=`echo "$LIBUNISTRING_VERSION" | sed -n -e "$gl_libunistring_sed_extract_minor"`
+ LIBUNISTRING_VERSION_SUBMINOR=`echo "$LIBUNISTRING_VERSION" | sed -n -e "$gl_libunistring_sed_extract_subminor"`
+ fi
+])
+
+dnl gl_LIBUNISTRING_VERSION_CMP([VERSION])
+dnl Expands to a shell statement that evaluates to true if LIBUNISTRING_VERSION
+dnl is less than the VERSION argument.
+AC_DEFUN([gl_LIBUNISTRING_VERSION_CMP],
+[ { test "$HAVE_LIBUNISTRING" != yes \
+ || {
+ dnl AS_LITERAL_IF exists and works fine since autoconf-2.59 at least.
+ AS_LITERAL_IF([$1],
+ [dnl This is the optimized variant, that assumes the argument is a literal:
+ m4_pushdef([requested_version_major],
+ [gl_LIBUNISTRING_ARG_OR_ZERO(m4_bpatsubst([$1], [^\([0-9]*\).*], [\1]), [])])
+ m4_pushdef([requested_version_minor],
+ [gl_LIBUNISTRING_ARG_OR_ZERO(m4_bpatsubst([$1], [^[0-9]*[.]\([0-9]*\).*], [\1]), [$1])])
+ m4_pushdef([requested_version_subminor],
+ [gl_LIBUNISTRING_ARG_OR_ZERO(m4_bpatsubst([$1], [^[0-9]*[.][0-9]*[.]\([0-9]*\).*], [\1]), [$1])])
+ test $LIBUNISTRING_VERSION_MAJOR -lt requested_version_major \
+ || { test $LIBUNISTRING_VERSION_MAJOR -eq requested_version_major \
+ && { test $LIBUNISTRING_VERSION_MINOR -lt requested_version_minor \
+ || { test $LIBUNISTRING_VERSION_MINOR -eq requested_version_minor \
+ && test $LIBUNISTRING_VERSION_SUBMINOR -lt requested_version_subminor
+ }
+ }
+ }
+ m4_popdef([requested_version_subminor])
+ m4_popdef([requested_version_minor])
+ m4_popdef([requested_version_major])
+ ],
+ [dnl This is the unoptimized variant:
+ requested_version_major=`echo '$1' | sed -n -e "$gl_libunistring_sed_extract_major"`
+ requested_version_minor=`echo '$1' | sed -n -e "$gl_libunistring_sed_extract_minor"`
+ requested_version_subminor=`echo '$1' | sed -n -e "$gl_libunistring_sed_extract_subminor"`
+ test $LIBUNISTRING_VERSION_MAJOR -lt $requested_version_major \
+ || { test $LIBUNISTRING_VERSION_MAJOR -eq $requested_version_major \
+ && { test $LIBUNISTRING_VERSION_MINOR -lt $requested_version_minor \
+ || { test $LIBUNISTRING_VERSION_MINOR -eq $requested_version_minor \
+ && test $LIBUNISTRING_VERSION_SUBMINOR -lt $requested_version_subminor
+ }
+ }
+ }
+ ])
+ }
+ }])
+
+dnl gl_LIBUNISTRING_ARG_OR_ZERO([ARG], [ORIG]) expands to ARG if it is not the
+dnl same as ORIG, otherwise to 0.
+m4_define([gl_LIBUNISTRING_ARG_OR_ZERO], [m4_if([$1], [$2], [0], [$1])])
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