As noticed when verifying the dejagnu fix. Tested cris-elf
with a new newlib that arranges to emit the mentioned
warning, with/without the update in dejagnu to handle the
miniscule "in". Ok to commit?
-- >8 --
All testsuite compiler-calls pass default_target_compile in the
dejagnu installation (typically /usr/share/dejagnu/target.exp) which
also calls the dejagnu-installed prune_warnings.
Normally, tests using the dg framework (most or all tests these days)
compile and link by calling various wrappers that end up calling
dg-test in the dejagnu installation, typically installed as
/usr/share/dejagnu/dg.exp. That, besides the compiler call, also
calls ${tool}-dg-prune (g++-dg-prune) on the messages, which in turn
ends up calling prune_gcc_output in gcc/testsuite/lib/prune.exp. That
gcc-specific "pruning" function handles more cases than the dejagnu
prune_warnings, and also has updated patterns.
But, module_do_it in modules.exp calls the lower-level
${tool}_target_compile "directly", i.e. g++_target_compile defined in
gcc/testsuite/lib/g++.exp. That does not call ${tool}-dg-prune,
meaning those test-cases miss the gcc-specific pruning.
Noticed while testing a dejagnu update that handled the miniscule "in"
in the warning (line-breaks added below besides the original one after
"(void*)':")
"/path/to/cris-elf/bin/ld:
/gccobj/cris-elf/./libstdc++-v3/src/.libs/libstdc++.a(random.o): in
function `std::(anonymous namespace)::__libc_getentropy(void*)':
/gccsrc/libstdc++-v3/src/c++11/random.cc:183: warning: _getentropy is
not implemented and will always fail"
The line saying "in function" rather than "In function" (from the
binutils linker since 2018) is pruned by prune_gcc_output. The
prune_warnings in dejagnu-1.6.3 and earlier handles the second line
separately. It's an unfortunate wart that neither consumes the
delimiting line-break, leaving to the callers to prune residual empty
lines. See prune_warnings in dejagnu (default_target_compile and
dg-test) for those other line-break fixups, as alluded in the comment.
* g++.dg/modules/modules.exp (module_do_it): Prune compilation
messages.
---
gcc/testsuite/g++.dg/modules/modules.exp | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/gcc/testsuite/g++.dg/modules/modules.exp
b/gcc/testsuite/g++.dg/modules/modules.exp
index 3e8df9b89309..e6bf28d8b1a0 100644
--- a/gcc/testsuite/g++.dg/modules/modules.exp
+++ b/gcc/testsuite/g++.dg/modules/modules.exp
@@ -205,9 +205,19 @@ proc module_do_it { do_what testcase std asm_list } {
if { !$ok } {
unresolved "$ident link"
} else {
+ global target_triplet
set out [${tool}_target_compile $asm_list \
$execname executable $options]
eval $xfail
+
+ # Do gcc-specific pruning.
+ set out [${tool}-dg-prune $target_triplet $out]
+ # Fix up remaining line-breaks similar to "regular" pruning
+ # calls. Otherwise, a multi-line message stripped e.g. one
+ # part by the default prune_warnings and one part part by the
+ # gcc prune_gcc_output will have a residual line-break.
+ regsub "^\[\r\n\]+" $out "" out
+
if { $out == "" } {
pass "$ident link"
} else {
--
2.30.2
