FYI: Autoconf patch to avoid generation of arbitralily-long lines

[Paul Eggert]

I installed this:

2005-02-03  Paul Eggert  <address@hidden>

        Try not to generated lines of unlimited length, as POSIX places a
        2047-byte limit on line length of portable text files.
        * lib/autoconf/general.m4 (AC_SUBST, AC_SUBST_FILE):
        Use newline as a separator, not space.
        * lib/autotest/general.m4 (AT_TESTED, AT_KEYWORDS): Likewise.
        (AT_CAPTURE_FILE): Use space-backslash-newline as a separator, not
        space.

Index: lib/autoconf/general.m4
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/autoconf/general.m4,v
retrieving revision 1.841
diff -p -u -r1.841 general.m4
--- lib/autoconf/general.m4     2 Feb 2005 23:31:16 -0000       1.841
+++ lib/autoconf/general.m4     4 Feb 2005 07:28:48 -0000
@@ -1942,7 +1942,8 @@ _ACEOF
 m4_define([AC_SUBST],
 [m4_pattern_allow([^$1$])dnl
 m4_ifvaln([$2], [$1=$2])[]dnl
-m4_append_uniq([_AC_SUBST_VARS], [$1], [ ])dnl
+m4_append_uniq([_AC_SUBST_VARS], [$1], [
+])dnl
 ])# AC_SUBST
 
 
@@ -1951,7 +1952,8 @@ m4_append_uniq([_AC_SUBST_VARS], [$1], [
 # Read the comments of the preceding macro.
 m4_define([AC_SUBST_FILE],
 [m4_pattern_allow([^$1$])dnl
-m4_append_uniq([_AC_SUBST_FILES], [$1], [ ])])
+m4_append_uniq([_AC_SUBST_FILES], [$1], [
+])])
 
 
 
Index: lib/autotest/general.m4
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/autotest/general.m4,v
retrieving revision 1.170
diff -p -u -r1.170 general.m4
--- lib/autotest/general.m4     28 Jan 2005 21:21:32 -0000      1.170
+++ lib/autotest/general.m4     4 Feb 2005 07:28:48 -0000
@@ -1033,7 +1033,8 @@ m4_defun([AT_ARG_OPTION_ARG],[_AT_ARG_OP
 # must correspond to the version of the package.  PATH should be
 # already preset so the proper executable will be selected.
 m4_define([AT_TESTED],
-[m4_append_uniq([AT_tested], [$1], [ ])])
+[m4_append_uniq([AT_tested], [$1], [
+])])
 
 
 # AT_SETUP(DESCRIPTION)
@@ -1078,7 +1079,8 @@ m4_case([$1],
 # ---------------------
 # Declare a list of keywords associated to the current test group.
 m4_define([AT_KEYWORDS],
-[m4_append_uniq([AT_keywords], [$1], [ ])])
+[m4_append_uniq([AT_keywords], [$1], [
+])])
 
 
 # AT_CAPTURE_FILE(FILE)
@@ -1086,7 +1088,8 @@ m4_define([AT_KEYWORDS],
 # If the current test group does not behave as expected, save the contents of
 # FILE in the test suite log.
 m4_define([AT_CAPTURE_FILE],
-[m4_append_uniq([AT_capture_files], ["$1"], [ ])])
+[m4_append_uniq([AT_capture_files], ["$1"], [ \
+])])
 
 
 # AT_CLEANUP