1 # libunistring-base.m4 serial 1
2 dnl Copyright (C) 2010 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 dnl From Paolo Bonzini and Bruno Haible.
9 dnl gl_LIBUNISTRING_LIBSOURCE([VERSION], [SourceFile])
10 dnl Declares that SourceFile should be compiled, unless we are linking
11 dnl with libunistring and its version is >= the given VERSION.
12 dnl SourceFile should be relative to the lib directory and end in '.c'.
13 dnl This macro is to be used for public libunistring API, not for
16 dnl You have to bump the VERSION argument to the next projected version
17 dnl number each time you make a change that affects the behaviour of the
18 dnl functions defined in SourceFile (even if SourceFile itself does not
21 AC_DEFUN([gl_LIBUNISTRING_LIBSOURCE],
23 AC_REQUIRE([gl_LIBUNISTRING_LIB_PREPARE])
24 dnl Use the variables HAVE_LIBUNISTRING, LIBUNISTRING_VERSION from
25 dnl gl_LIBUNISTRING_CORE if that macro has been run.
26 if gl_LIBUNISTRING_VERSION_CMP([$1])
28 m4_foreach_w([gl_source_file], [$2],
29 [AC_LIBOBJ(m4_bpatsubst(m4_defn([gl_source_file]), [\.c$], []))
34 dnl gl_LIBUNISTRING_LIBHEADER([VERSION], [HeaderFile])
35 dnl Declares that HeaderFile should be created, unless we are linking
36 dnl with libunistring and its version is >= the given VERSION.
37 dnl HeaderFile should be relative to the lib directory and end in '.h'.
38 dnl Prepares for substituting LIBUNISTRING_HEADERFILE (to HeaderFile or empty).
40 dnl When we are linking with the already installed libunistring and its version
41 dnl is < VERSION, we create HeaderFile here, because we may compile functions
42 dnl (via gl_LIBUNISTRING_LIBSOURCE above) that are not contained in the
43 dnl installed version.
44 dnl When we are linking with the already installed libunistring and its version
45 dnl is > VERSION, we don't create HeaderFile here: it could cause compilation
46 dnl errors in other libunistring header files if some types are missing.
48 dnl You have to bump the VERSION argument to the next projected version
49 dnl number each time you make a non-comment change to the HeaderFile.
51 AC_DEFUN([gl_LIBUNISTRING_LIBHEADER],
53 AC_REQUIRE([gl_LIBUNISTRING_LIB_PREPARE])
54 dnl Use the variables HAVE_LIBUNISTRING, LIBUNISTRING_VERSION from
55 dnl gl_LIBUNISTRING_CORE if that macro has been run.
56 if gl_LIBUNISTRING_VERSION_CMP([$1])
58 LIBUNISTRING_[]AS_TR_CPP([$2])='$2'
60 LIBUNISTRING_[]AS_TR_CPP([$2])=
62 AC_SUBST([LIBUNISTRING_]AS_TR_CPP([$2]))
65 dnl Miscellaneous preparations/initializations.
67 AC_DEFUN([gl_LIBUNISTRING_LIB_PREPARE],
69 AC_REQUIRE([AC_PROG_AWK])
71 dnl Sed expressions to extract the parts of a version number.
73 gl_libunistring_sed_extract_major='/^[0-9]/{s/^\([0-9]*\).*/\1/p;q;}
78 gl_libunistring_sed_extract_minor='/^[0-9][0-9]*[.][0-9]/{s/^[0-9]*[.]\([0-9]*\).*/\1/p;q;}
83 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;}
90 if test "$HAVE_LIBUNISTRING" = yes; then
91 LIBUNISTRING_VERSION_MAJOR=`echo "$LIBUNISTRING_VERSION" | sed -n -e "$gl_libunistring_sed_extract_major"`
92 LIBUNISTRING_VERSION_MINOR=`echo "$LIBUNISTRING_VERSION" | sed -n -e "$gl_libunistring_sed_extract_minor"`
93 LIBUNISTRING_VERSION_SUBMINOR=`echo "$LIBUNISTRING_VERSION" | sed -n -e "$gl_libunistring_sed_extract_subminor"`
97 dnl gl_LIBUNISTRING_VERSION_CMP([VERSION])
98 dnl Expands to a shell statement that evaluates to true if LIBUNISTRING_VERSION
99 dnl is less than the VERSION argument.
100 dnl This is the unoptimized variant:
101 AC_DEFUN([gl_LIBUNISTRING_VERSION_CMP_ORIG],
102 [ { test "$HAVE_LIBUNISTRING" != yes \
104 requested_version_major=`echo '$1' | sed -n -e "$gl_libunistring_sed_extract_major"`
105 requested_version_minor=`echo '$1' | sed -n -e "$gl_libunistring_sed_extract_minor"`
106 requested_version_subminor=`echo '$1' | sed -n -e "$gl_libunistring_sed_extract_subminor"`
107 test $LIBUNISTRING_VERSION_MAJOR -lt $requested_version_major \
108 || { test $LIBUNISTRING_VERSION_MAJOR -eq $requested_version_major \
109 && { test $LIBUNISTRING_VERSION_MINOR -lt $requested_version_minor \
110 || { test $LIBUNISTRING_VERSION_MINOR -eq $requested_version_minor \
111 && test $LIBUNISTRING_VERSION_SUBMINOR -lt $requested_version_subminor
118 dnl This is the optimized variant, that assumes the argument is a literal:
119 AC_DEFUN([gl_LIBUNISTRING_VERSION_CMP],
120 [ { test "$HAVE_LIBUNISTRING" != yes \
122 m4_pushdef([requested_version_major],
123 [gl_LIBUNISTRING_ARG_OR_ZERO(m4_bpatsubst([$1], [^\([0-9]*\).*], [\1]), [])])
124 m4_pushdef([requested_version_minor],
125 [gl_LIBUNISTRING_ARG_OR_ZERO(m4_bpatsubst([$1], [^[0-9]*[.]\([0-9]*\).*], [\1]), [$1])])
126 m4_pushdef([requested_version_subminor],
127 [gl_LIBUNISTRING_ARG_OR_ZERO(m4_bpatsubst([$1], [^[0-9]*[.][0-9]*[.]\([0-9]*\).*], [\1]), [$1])])
128 test $LIBUNISTRING_VERSION_MAJOR -lt requested_version_major \
129 || { test $LIBUNISTRING_VERSION_MAJOR -eq requested_version_major \
130 && { test $LIBUNISTRING_VERSION_MINOR -lt requested_version_minor \
131 || { test $LIBUNISTRING_VERSION_MINOR -eq requested_version_minor \
132 && test $LIBUNISTRING_VERSION_SUBMINOR -lt requested_version_subminor
136 m4_popdef([requested_version_subminor])
137 m4_popdef([requested_version_minor])
138 m4_popdef([requested_version_major])
143 dnl gl_LIBUNISTRING_ARG_OR_ZERO([ARG], [ORIG]) expands to ARG if it is not the
144 dnl same as ORIG, otherwise to 0.
145 m4_define([gl_LIBUNISTRING_ARG_OR_ZERO], [m4_if([$1], [$2], [0], [$1])])