As reported by Christopher Zimmermann in <http://bugs.debian.org/379757>,
code generated from simple #undef directives by h2ph can cause
'Constant subroutine ... undefined' warnings if the undefined
function was eligible for inlining.
---
t/lib/h2ph.h | 4 ++++
t/lib/h2ph.pht | 4 +++-
utils/h2ph.PL | 2 +-
3 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/t/lib/h2ph.h b/t/lib/h2ph.h
index 23f259e..78429ca 100644
--- a/t/lib/h2ph.h
+++ b/t/lib/h2ph.h
@@ -26,6 +26,10 @@
#undef MAX
#define MAX(a,b) ((a) > (b) ? (a) : (b))
+/* Test #undef'ining an existing constant function */
+#define NOTTRUE 0
+#undef NOTTRUE
+
/* Test #ifdef */
#ifdef __SOME_UNIMPORTANT_PROPERTY
#define MIN(a,b) ((a) < (b) ? (a) : (b))
diff --git a/t/lib/h2ph.pht b/t/lib/h2ph.pht
index 01db98d..3723fca 100644
--- a/t/lib/h2ph.pht
+++ b/t/lib/h2ph.pht
@@ -1,6 +1,6 @@
require '_h2ph_pre.ph';
-no warnings 'redefine';
+no warnings qw(redefine misc);
unless(defined(&SQUARE)) {
sub SQUARE {
@@ -22,6 +22,8 @@ unless(defined(&_H2PH_H_)) {
my($a,$b) = @_;
eval q((($a) > ($b) ? ($a) : ($b)));
}' unless defined(&MAX);
+ eval 'sub NOTTRUE () {0;}' unless defined(&NOTTRUE);
+ undef(&NOTTRUE) if defined(&NOTTRUE);
if(defined(&__SOME_UNIMPORTANT_PROPERTY)) {
eval 'sub MIN {
my($a,$b) = @_;
diff --git a/utils/h2ph.PL b/utils/h2ph.PL
index 6f40126..4e99a7a 100644
--- a/utils/h2ph.PL
+++ b/utils/h2ph.PL
@@ -123,7 +123,7 @@ while (defined (my $file = next_file())) {
print OUT
"require '_h2ph_pre.ph';\n\n",
- "no warnings 'redefine';\n\n";
+ "no warnings qw(redefine misc);\n\n";
while (defined (local $_ = next_line($file))) {
if (s/^\s*\#\s*//) {
--
1.5.6.5
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