diff options
Diffstat (limited to 'lib/autoconf/general.m4')
| -rw-r--r-- | lib/autoconf/general.m4 | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/autoconf/general.m4 b/lib/autoconf/general.m4 index c15fb132..ef6285d6 100644 --- a/lib/autoconf/general.m4 +++ b/lib/autoconf/general.m4 @@ -2167,9 +2167,11 @@ m4_define([AC_DEFINE_UNQUOTED], [_AC_DEFINE_Q([_$0], $@)]) # Append the pre-expanded STRING and a newline to confdefs.h, as if # with an unquoted here-doc, but avoiding a fork in the common case of # no backslash, no command substitution, no complex variable -# substitution, and no quadrigraphs. +# substitution (taking into account quadrigraphs as well). Also +# avoid AS_ECHO if "#" is present to avoid confusing m4 with comments, +# but quadrigraphs are fine in that case. m4_define([_AC_DEFINE_UNQUOTED], -[m4_if(m4_bregexp([$1], [\\\|`\|\$(\|\${\|@]), [-1], +[m4_if(m4_bregexp([$1], [#\|\\\|`\|\(\$\|@S|@\)\((|{|@{:@\)]), [-1], [AS_ECHO(["AS_ESCAPE([$1], [""])"]) >>confdefs.h], [cat >>confdefs.h <<_ACEOF [$1] |