I have it fixed locally, but yeah I have not yet committed it.
Jonathan Wakely writes:
> On 25/04/19 15:58 -0700, Thomas Rodgers wrote:
>>
>> PR libstdc++/90252
>> * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
>> Changed v3_target_compile check from preprocess to executable.
>>---
>> libstdc++-v3/testsuite/lib/libstdc++.exp | 9 +++++++--
>> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> This patch is still pending, but I think it's missing -ltbb that would
> actually make the link succeed, isn't it?
>
>>diff --git a/libstdc++-v3/testsuite/lib/libstdc++.exp
>>b/libstdc++-v3/testsuite/lib/libstdc++.exp
>>index c48b4d78bbb..fa61bccc9f6 100644
>>--- a/libstdc++-v3/testsuite/lib/libstdc++.exp
>>+++ b/libstdc++-v3/testsuite/lib/libstdc++.exp
>>@@ -1612,15 +1612,20 @@ proc check_effective_target_tbb-backend { } {
>> # Set up and preprocess a C++ test program that depends
>> # on tbb
>> set src tbb_backend[pid].cc
>>-
>>+ set exe tbb_backend[pid].x
>>+
>> set f [open $src "w"]
>> puts $f "#include <tbb/tbb.h>"
>> puts $f "#if TBB_INTERFACE_VERSION < 10000"
>> puts $f "# error Intel(R) Threading Building Blocks 2018 is required;
>> older versions are not supported."
>> puts $f "#endif"
>>+ puts $f "int main ()"
>>+ puts $f "{"
>>+ puts $f " return 0;"
>>+ puts $f "}"
>> close $f
>>
>>- set lines [v3_target_compile $src /dev/null preprocess ""]
>>+ set lines [v3_target_compile $src $exe executable ""]
>> file delete $src
>>
>> if [string match "" $lines] {
>> --
>>2.20.1
>>
