Extend flymake's warning predicate to be a function. Test suite for flymake.

* lisp/progmodes/flymake.el (flymake-warning-predicate): New.
(flymake-parse-line): Use it.
(flymake-warning-re): Make obsolete alias to
`flymake-warning-predicate'.
* doc/misc/flymake.texi (Parsing the output, Customizable variables):
Add reference to `flymake-warning-predicate'.
* test/automated/flymake-tests.el:
* test/automated/flymake/warnpred/Makefile
* test/automated/flymake/warnpred/test.c
* test/automated/flymake/warnpred/test.pl: New files.

Fixes: debbugs:14217

3 files changed, 15 insertions, 0 deletions

diff --git a/test/automated/flymake/warnpred/Makefile b/test/automated/flymake/warnpred/Makefile
new file mode 100644
index 00000000000..33af51c3337
--- /dev/null
+++ b/test/automated/flymake/warnpred/Makefile
@@ -0,0 +1,8 @@
+# Makefile for flymake tests
+
+CC_OPTS = -Wall
+
+check-syntax:
+	$(CC) $(CC_OPTS) ${CHK_SOURCES}
+
+# eof
diff --git a/test/automated/flymake/warnpred/test.c b/test/automated/flymake/warnpred/test.c
new file mode 100644
index 00000000000..3a3926131f5
--- /dev/null
+++ b/test/automated/flymake/warnpred/test.c
@@ -0,0 +1,5 @@
+int main()
+{
+  char c = 1000;
+  return c;
+}
diff --git a/test/automated/flymake/warnpred/test.pl b/test/automated/flymake/warnpred/test.pl
new file mode 100644
index 00000000000..2013b2e4434
--- /dev/null
+++ b/test/automated/flymake/warnpred/test.pl
@@ -0,0 +1,2 @@
+@arr = [1,2,3,4];
+@arr[1] = -1;