Fix namespace contamination in testsuite.

* tests/append01.at: Use m4_pushdef/m4_popdef to define local macros.
* tests/delete03.at: Likewise.
* tests/exclude06.at: Likewise.
* tests/incr04.at: Likewise.
* tests/link03.at: Likewise.
* tests/long01.at: Likewise.
* tests/longv7.at: Likewise.
* tests/lustar01.at: Likewise.
* tests/lustar02.at: Likewise.
* tests/lustar03.at: Likewise.
* tests/multiv05.at: Likewise.
* tests/sparse04.at: Likewise.

tests/append01.at

@@ -29,7 +29,7 @@
 AT_SETUP([appending files with long names])
 AT_KEYWORDS([append append01])
 
-m4_define([PREFIX],[This_is_a_very_long_file_name_prefix_that_is_designed_to_cause_problems_with_appending_long_file_names_that_run_into_a_limit_of_the_ustar_tarX])
+m4_pushdef([PREFIX],[This_is_a_very_long_file_name_prefix_that_is_designed_to_cause_problems_with_appending_long_file_names_that_run_into_a_limit_of_the_ustar_tarX])
 
 AT_TAR_CHECK([
 mkdir PREFIX
@@ -44,4 +44,5 @@ PREFIX/file2
 ],
 [],[],[],[oldgnu, ustar, posix, gnu])
 
+m4_popdef([PREFIX])
 AT_CLEANUP

tests/delete03.at

@@ -21,7 +21,7 @@
 AT_SETUP([deleting members with long names])
 AT_KEYWORDS([delete delete03])
 
-m4_define([PREFIX],[This_is_a_very_long_file_name_prefix_that_is_designed_to_cause_problems_with_file_names_that_run_into_a_limit_of_the_posix_tar_formatXX])
+m4_pushdef([PREFIX],[This_is_a_very_long_file_name_prefix_that_is_designed_to_cause_problems_with_file_names_that_run_into_a_limit_of_the_posix_tar_formatXX])
 
 AT_TAR_CHECK([
 
@@ -45,4 +45,5 @@ tar -cf archive ./$prefix* &&
 ./PREFIX[]9
 ],[],[],[],[gnu, oldgnu, posix])
 
+m4_popdef([PREFIX])
 AT_CLEANUP

tests/exclude06.at

@@ -26,7 +26,7 @@
 AT_SETUP([exclude: long files in pax archives])
 AT_KEYWORDS([exclude exclude06])
 
-m4_define([test_base_dir],[one/two/three/four/five/six/seven/eight/nine/ten/eleven/twelve/thirteen/fourteen/fifteen/sixteen/seventeen])
+m4_pushdef([test_base_dir],[one/two/three/four/five/six/seven/eight/nine/ten/eleven/twelve/thirteen/fourteen/fifteen/sixteen/seventeen])
 
 AT_TAR_CHECK([
 AT_TAR_MKHIER(test_base_dir)
@@ -46,4 +46,5 @@ find out -type f
 [],
 [pax])
 
+m4_popdef([test_base_dir])
 AT_CLEANUP

tests/incr04.at

@@ -29,7 +29,7 @@
 AT_SETUP([proper icontents initialization])
 AT_KEYWORDS([incremental incr04 icontents])
 
-m4_define([NAME_PREFIX],[a/b/one_31_chars_long_file_name_])
+m4_pushdef([NAME_PREFIX],[a/b/one_31_chars_long_file_name_])
 
 AT_TAR_CHECK([
 AT_TAR_MKHIER(a/b)
@@ -61,6 +61,7 @@ tar: a/b: Directory is new
 tar: a/c: Directory has been renamed from 'a/b'
 ],[],[],[gnu, oldgnu, posix])
 
+m4_popdef([NAME_PREFIX])
 AT_CLEANUP
 
 # End of incr04.at

tests/link03.at

@@ -24,7 +24,7 @@
 AT_SETUP([working -l with --remove-files])
 AT_KEYWORDS([hardlinks link03])
 
-m4_define([create_files],[
+m4_pushdef([create_files],[
 genfile -l 64 -f file1
 ln file1 file2
 ln file2 file3
@@ -51,4 +51,5 @@ file1
 [tar: Missing links to 'file1'.
 ])
 
+m4_popdef([create_files])
 AT_CLEANUP

tests/long01.at

@@ -29,8 +29,8 @@ AT_SETUP([long file names divisible by block size])
 AT_KEYWORDS([longname long512])
 
 dnl Create a directory structure with maximum directory name length 512-16
-m4_define([NAME],[0123456789abcde])
-m4_define([FULLNAME],NAME)
+m4_pushdef([NAME],[0123456789abcde])
+m4_pushdef([FULLNAME],NAME)
 m4_for([N],0,29,,[m4_define([FULLNAME],FULLNAME/NAME)])
 
 AT_TAR_CHECK([
@@ -45,4 +45,6 @@ endfile
 ],
 [],[],[],[gnu,oldgnu])
 
+m4_popdef([NAME])
+m4_popdef([FULLNAME])
 AT_CLEANUP

tests/longv7.at

@@ -24,8 +24,8 @@
 AT_SETUP([long names in V7 archives])
 AT_KEYWORDS([longname longv7])
 
-m4_define([DIR],[this_is_a_very_long_name_for_a_directory_which_causes_problems])
-m4_define([FILE],[this_is_a_very_long_file_name_which_raises_issues.c])
+m4_pushdef([DIR],[this_is_a_very_long_name_for_a_directory_which_causes_problems])
+m4_pushdef([FILE],[this_is_a_very_long_file_name_which_raises_issues.c])
 
 AT_TAR_CHECK([
 mkdir DIR
@@ -44,4 +44,6 @@ tar: Exiting with failure status due to previous errors
 ],
 [],[],[v7])
 
+m4_popdef([FILE])
+m4_popdef([DIR])
 AT_CLEANUP

tests/lustar01.at

@@ -21,7 +21,7 @@
 AT_SETUP([ustar: unsplittable file name])
 AT_KEYWORDS([longname ustar lustar01])
 
-m4_define([LONGNAME],
+m4_pushdef([LONGNAME],
           [this_is_a_very_long_name_for_a_file_designed_to_test_generation_of_ustar_archives_by_gnu_tar_semicolon_it_will_not_fit_the_name_field_and_cannot_be_split_between_name_and_prefix])
 
 AT_TAR_CHECK([
@@ -34,4 +34,5 @@ tar cf archive LONGNAME
 tar: Exiting with failure status due to previous errors
 ],[],[],[ustar])
 
+m4_popdef([LONGNAME])
 AT_CLEANUP

tests/lustar02.at

@@ -21,13 +21,13 @@
 AT_SETUP([ustar: unsplittable path name])
 AT_KEYWORDS([longname ustar lustar02])
 
-m4_define([PREFIX_155],
+m4_pushdef([PREFIX_155],
 	  [this_is_a_very_long_name_for_a_file_designed_to_test_generation_of_ustar_archives_by_gnu_tar_semicolon_it_will_not_fit_the_name_field_and_cannot_be_split_be])
 
-m4_define([DIR_155],
+m4_pushdef([DIR_155],
 	  [this_is_a_very_long_name_for_a_file_designed_to_test_generation/of_ustar_archives_by_gnu_tar_semicolon_it_will_not_fit_the_name_field_and_cannot_be_split_be])
 
-m4_define([NAME], [tween_name_and_prefix])
+m4_pushdef([NAME], [tween_name_and_prefix])
 
 AT_TAR_CHECK([
 AT_TAR_MKHIER(PREFIX_155,NAME)
@@ -39,4 +39,8 @@ tar cf archive PREFIX_155
 tar: Exiting with failure status due to previous errors
 ],[],[],[ustar])
 
+m4_popdef([NAME])
+m4_popdef([DIR_155])
+m4_popdef([PREFIX_155])
+
 AT_CLEANUP

tests/lustar03.at

@@ -21,10 +21,10 @@
 AT_SETUP([ustar: splitting long names])
 AT_KEYWORDS([longname ustar lustar03])
 
-m4_define([DIR_155],
+m4_pushdef([DIR_155],
 	  [this_is_a_very_long_name_for_a_file_designed_to_test_generation/of_ustar_archives_by_gnu_tar_semicolon_it_will_not_fit_the_name_field_and_cannot_be_split_be])
 
-m4_define([NAME], [file])
+m4_pushdef([NAME], [file])
 
 AT_TAR_CHECK([
 AT_TAR_MKHIER(DIR_155,NAME)
@@ -40,4 +40,6 @@ DIR_155/NAME
 ],
 [],[],[],[ustar])
 
+m4_popdef([NAME])
+m4_popdef([DIR_155])
 AT_CLEANUP

tests/multiv05.at

@@ -25,7 +25,7 @@
 
 AT_SETUP([Restoring after an out of sync volume])
 AT_KEYWORDS([multivolume multiv multiv05 sync])
-m4_define([FILELIST],[jeden,dwa,trzy,cztery,piec,szesc])
+m4_pushdef([FILELIST],[jeden,dwa,trzy,cztery,piec,szesc])
 
 AT_TAR_CHECK([
 exec <&-
@@ -61,4 +61,5 @@ m4_foreach([file],
 [tar: 'trzy' is not continued on this volume
 ],[],[], [gnu])
 
+m4_popdef([FILELIST])
 AT_CLEANUP

tests/sparse04.at

@@ -29,7 +29,7 @@ AT_KEYWORDS([sparse sparse04])
 # References: <[email protected]>,
 #             http://lists.gnu.org/archive/html/bug-tar/2010-11/msg00099.html
 
-m4_define([NAME_111],
+m4_pushdef([NAME_111],
 	  [123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960])
 
 AT_TAR_CHECK([
@@ -44,4 +44,5 @@ tar -f - -c --sparse --posix NAME_111 | tar tf -
 [],
 [pax])
 
+m4_popdef([NAME_111])
 AT_CLEANUP