URL:
<https://savannah.gnu.org/support/?110554>
Summary: AC_CONFIG_HEADERS doesn't work properly for files
with Windows line-endings
Project: Autoconf
Submitted by: dra27
Submitted on: Thu 21 Oct 2021 04:20:43 PM UTC
Category: None
Priority: 5 - Normal
Severity: 3 - Normal
Status: None
Privacy: Public
Assigned to: None
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Operating System: Microsoft Windows
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Details:
For headers with standard
#undef MACRO
lines, AC_CONFIG_HEADERS doesn't perform substitutions if the there is no
whitespace following MACRO and the .in file has Windows CRLF line-endings.
This is a mild nuisance, given that the C pre-processor shouldn't mind about
line endings. The work-around is to add space (or space and a comment) after
the macro name, but the fix seems relatively straightforward (assuming the
change is portable).
diff --git a/lib/autoconf/status.m4 b/lib/autoconf/status.m4
index c2721a85..d5c222bb 100644
--- a/lib/autoconf/status.m4
+++ b/lib/autoconf/status.m4
@@ -824,9 +824,9 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
for (key in D) D_is_set[key] = 1
FS = "^G"
}
-/^[\t ]*#[\t ]*(define|undef)[\t ]+$ac_word_re([\t (]|\$)/ {
+/^[\t ]*#[\t ]*(define|undef)[\t ]+$ac_word_re([\t (]|\r?\$)/ {
line = \$ 0
- split(line, arg, " ")
+ split(line, arg, /[ \r\t]/)
if (arg[1] == "#") {
defundef = arg[2]
mac1 = arg[3]
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