# libunistring-base.m4 serial 8 dnl Copyright (C) 2010-2023 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). dnl dnl This macro invocation must not occur in macros that are AC_REQUIREd. 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. gl_CONDITIONAL(AS_TR_CPP([LIBUNISTRING_COMPILE_$2]), [gl_LIBUNISTRING_VERSION_CMP([$1])]) ]) dnl gl_LIBUNISTRING_MODULE_WITH_VARIABLE([VERSION], [Module]) dnl is like gl_LIBUNISTRING_MODULE([VERSION], [Module]), except that it also dnl defines an AC_SUBSTed autoconf variable GNULIB_$MODULE_DLL_VARIABLE. dnl What's the expansion of this autoconf variable? dnl - When building libunistring, it expands to LIBUNISTRING_DLL_VARIABLE. dnl (This is necessary because this token must be present in the .h files dnl when the .h files get installed.) dnl - When building gnulib or application code it expands to dnl - LIBUNISTRING_DLL_VARIABLE by default, dnl - empty if the automake conditional LIBUNISTRING_COMPILE_$MODULE dnl evaluates to true. dnl (This is necessary because when the conditional evaluates to false, dnl the application code expects to use the declared variable from the dnl installed libunistring; it's in this case that the dnl LIBUNISTRING_DLL_VARIABLE macro from the installed dnl must be used.) dnl dnl This macro invocation must not occur in macros that are AC_REQUIREd. AC_DEFUN([gl_LIBUNISTRING_MODULE_WITH_VARIABLE], [ gl_LIBUNISTRING_MODULE([$1], [$2]) m4_ifndef([gl_IN_LIBUNISTRING], [if test -z "${AS_TR_CPP([LIBUNISTRING_COMPILE_$2])_TRUE}"; then GL_MODULE_INDICATOR_PREFIX[]_GNULIB_[]AS_TR_CPP([$2_DLL_VARIABLE])= fi ]) ]) 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([$1]); then dnl It is OK to use a .h file in lib/ from within tests/, but not vice dnl versa. if test -z "$LIBUNISTRING_[]AS_TR_CPP([$2])"; then LIBUNISTRING_[]AS_TR_CPP([$2])="${gl_source_base_prefix}$2" fi 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 "$gl_libunistring_sed_extract_subminor"` fi dnl Determine whether from an installed libunistring dnl is available. m4_ifdef([gl_IN_LIBUNISTRING], [dnl In libunistring, all .h files that declare variables need to dnl #include . This references the file dnl unistring/woe32dll.h in libunistring. HAVE_UNISTRING_WOE32DLL_H=1 ], [dnl In gnulib or in applications, we need a #include dnl if and only if an installed libunistring is available. if test "$HAVE_LIBUNISTRING" = yes; then AC_CHECK_HEADERS([unistring/woe32dll.h], [HAVE_UNISTRING_WOE32DLL_H=1], [HAVE_UNISTRING_WOE32DLL_H=0]) else HAVE_UNISTRING_WOE32DLL_H=0 fi ]) AC_SUBST([HAVE_UNISTRING_WOE32DLL_H]) ]) 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])])