autoconf version 2.63 does not have AS_VAR_APPEND, resulting errors below:
tests/testsuite.tmp:3863: error: possibly undefined macro: AS_VAR_APPEND
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
make[2]: *** [tests/testsuite] Error 1
Signed-off-by: William Tu <[email protected]>
---
m4/compat.at | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/m4/compat.at b/m4/compat.at
index 736f1ff..607d1eb 100644
--- a/m4/compat.at
+++ b/m4/compat.at
@@ -30,3 +30,7 @@ m4_ifndef([AT_FAIL_IF],
m4_ifndef([AS_VAR_COPY],
[m4_define([AS_VAR_COPY],
[AS_LITERAL_IF([$1[]$2], [$1=$$2], [eval $1=\$$2])])])
+
+m4_ifndef([AS_VAR_APPEND],
+ [m4_define([AS_VAR_APPEND],
+ [$1=$$1$2])])
--
2.5.0
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